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Dr Julian Pittard

Astrophysics Group

Contact details

Room: 9.82
Tel: +44 (0)113 3433805
Email: J.M.Pittard @ leeds.ac.uk

Keywords

Colliding Stellar Winds
Computational Fluid Dynamics
Dynamics of the Interstellar Medium
Physics of Shocks and Mass-Loaded Flows
Star Formation
Stellar Feedback

Research interests

My research focuses on the impact that massive stars have on their surrounding environment (stellar feedback), and how this affects the dynamics and structure of the interstellar medium (ISM). Massive stars return most of their mass to the ISM during their lives and final death throes. The expelled material, in the form of stellar winds, eruptions and explosions, sweeps up and compresses interstellar material, and drives turbulence in the ISM. Large groups of massive stars can significantly affect galaxy evolution: in dwarf galaxies starburst-driven galactic winds can completely expel the ISM. On more local scales, stellar feedback has the potential to enhance star formation (via triggering), though perhaps more often disrupts it.

I use advanced computational techniques and numerical codes to simulate many aspects of this stellar feedback. On the smallest scales I simulate the interaction of stellar winds in massive binary star systems. Each wind acts as an in-situ probe of the other, and can reveal fascinating details about the process of mass-loss from high mass stars and the physics of high mach number shocks (e.g. post-shock equilibration, particle acceleration and dust formation). I also study the way that astrophysical flows interact with a clumpy environment. The interstellar and circumstellar gas around stars is far from homogeneous and contains dense clumps of gas embedded in a lower density medium. The details of the interaction have consequences for the evolution of many astrophysical sources, including wind-blown bubbles, supernova remnants, and starburst superwinds. The mixing of material stripped from clumps into the background flow is a key issue which is not well understood at present. I have also used 3D simulations to study the effect that massive star winds and their supernova explosions have on the gaseous material remaining in the stellar nursery in which they form. This work showed that both forms of feedback, and the SN explosion in particular, may couple inefficiently to the surrounding medium. However, we are far from fully understanding this process.

Useful links

Astrophysics Group Webpage
Personal Webpage

Publications

Wareing CJ, Pittard JM, Falle SAEG Hydrodynamic simulations of mechanical stellar feedback in a molecular cloud formed by thermal instability Monthly Notices of the Royal Astronomical Society 470 2283-2313, 2017
DOI:10.1093/mnras/stx1417
View abstract

Goldsmith KJA, Pittard JM A comparison of shock-cloud and wind-cloud interactions: The longer survival of clouds in winds Monthly Notices of the Royal Astronomical Society 470 2427-2438, 2017
DOI:10.1093/mnras/stx1431
View abstract

Steggles HG, Hoare MG, Pittard JM Hydrodynamical models of cometary H ii regions Monthly Notices of the Royal Astronomical Society 466 4573-4591, 2017
DOI:10.1093/mnras/stw3373
View abstract

Close JL, Pittard JM Hydrodynamic ablation of protoplanetary disks via supernovae Monthly Notices of the Royal Astronomical Society 469 1117-1130, 2017
DOI:10.1093/mnras/stx897
View abstract

Wareing CJ, Pittard JM, Falle SAEG Magnetohydrodynamic simulations of mechanical stellar feedback in a sheet-like molecular cloud Monthly Notices of the Royal Astronomical Society 465 2757-2783, 2017
DOI:10.1093/mnras/stw2990
View abstract

Goldsmith KJA, Pittard JM The interaction of a magnetohydrodynamical shock with a filament Monthly Notices of the Royal Astronomical Society 461 578-605, 2016
DOI:10.1093/mnras/stw1365
View abstract

Wareing CJ, Pittard JM, Falle SAEG, Van Loo S Magnetohydrodynamical simulation of the formation of clumps and filaments in quiescent diffuse medium by thermal instability Monthly Notices of the Royal Astronomical Society 459 1803-1818, 2016
DOI:10.1093/mnras/stw581
View abstract

Pittard JM, Goldsmith KJA Numerical simulations of a shock-filament interaction Monthly Notices of the Royal Astronomical Society 458 1139-1163, 2016
DOI:10.1093/mnras/stw378
View abstract

Pittard JM, Parkin ER The turbulent destruction of clouds - III. Three-dimensional adiabatic shock-cloud simulations Monthly Notices of the Royal Astronomical Society 457 4470-4498, 2016
DOI:10.1093/mnras/stw025
View abstract

Hamaguchi K, Corcoran MF, Gull TR, Takahashi H, Grefenstette BW, Yuasa T, Stuhlinger M, Russell CMP, Moffat AFJ, Sharma N, Madura TI, Richardson ND, Groh J, Pittard JM, Owocki S ETA CARINAE'S THERMAL X-RAY TAIL MEASURED with XMM-Newton and NuSTAR Astrophysical Journal 817 -, 2016
DOI:10.3847/0004-637X/817/1/23
View abstract

Wareing C, Pittard J, Falle S Dataset associated with’Magnetohydrodynamic simulations of mechanical stellar feedback in a sheet-like molecular cloud’, 2016
DOI:10.5518/114

Goldsmith K, Pittard J Raw data, statistics, and images pertaining to the interaction of a magnetohydrodynamical shock with a filament, 2016
DOI:10.5518/74

Sugawara Y, Maeda Y, Tsuboi Y, Hamaguchi K, Corcoran M, Pollock AMT, Moffat AFJ, Williams PM, Dougherty S, Pittard J Suzaku monitoring of the Wolf-Rayet binary WR 140 around periastron passage: An approach for quantifying the wind parameters Publications of the Astronomical Society of Japan 67 -, 2015
DOI:10.1093/pasj/psv099
View abstract

Lomax JR, Nazé Y, Hoffman JL, Russell CMP, De Becker M, Corcoran MF, Davidson JW, Neilson HR, Owocki S, Pittard JM, Pollock AMT V444 Cygni X-ray and polarimetric variability: radiative and coriolis forces shape the wind collision region Astronomy and Astrophysics 573 1-18, 2015
DOI:10.1051/0004-6361/201424468
View abstract

Hamaguchi K, Corcoran MF, Takahashi H, Yuasa T, Ishida M, Gull TR, Pittard JM, Russell CMP, Madura TI Suzaku monitoring of hard X-ray emission fromη carinae over a single binary orbital cycle Astrophysical Journal 795 1-12, 2014
DOI:10.1088/0004-637X/795/2/119
View abstract

Parkin ER, Pittard JM, Nazé Y, Blomme R The 2.35 year itch of Cygnus OB2 #9: III. X-ray and radio emission analysis based on 3D hydrodynamical modelling Astronomy and Astrophysics 570 1-20, 2014
DOI:10.1051/0004-6361/201423833
View abstract

Rogers H, Pittard JM Feedback from winds and supernovae in massive stellar clusters - II. X-ray emission Monthly Notices of the Royal Astronomical Society 441 964-982, 2014
DOI:10.1093/mnras/stu625
View abstract

Hamaguchi K, Corcoran MF, Russell CMP, Pollock AMT, Gull TR, Teodoro M, Madura TI, Damineli A, Pittard JM X-ray emission from eta carinae near periastron in 2009. I. A two-state solution Astrophysical Journal 784 1-6, 2014
DOI:10.1088/0004-637X/784/2/125
View abstract

Aluzas R, Pittard JM, Falle SAEG, Hartquist TW Numerical simulations of a shock interacting with multiple magnetized clouds Monthly Notices of the Royal Astronomical Society 444 971-993, 2014
DOI:10.1093/mnras/stu1501
View abstract

Close JL, Pittard JM, Hartquist TW, Falle SAEG Ram pressure stripping of the hot gaseous haloes of galaxies using the k -ε sub-grid turbulence model Monthly Notices of the Royal Astronomical Society 436 3021-3030, 2013
DOI:10.1093/mnras/stt1788
View abstract

Feigelson ED, Townsley LK, Broos PS, Busk HA, Getman KV, King RR, Kuhn MA, Naylor T, Povich MS, Baddeley A, Bate MR, Indebetouw R, Luhman KL, McCaughrean MJ, Pittard JM, Pudritz RE, Sills A, Song Y, Wadsley J Overview of the massive young star-forming complex study in infrared and X-ray (MYStIX) project Astrophysical Journal, Supplement Series 209 209-226, 2013
DOI:10.1088/0067-0049/209/2/26
View abstract

Pittard JM Self-sealing shells: blowouts and blisters on the surfaces of leaky wind-blown bubbles and supernova remnants Monthly Notices of the Royal Astronomical Society 435 3600-3613, 2013
DOI:10.1093/mnras/stt1552
View abstract

Rogers H, Pittard JM Feedback from winds and supernovae in massive stellar clusters - I. Hydrodynamics Monthly Notices of the Royal Astronomical Society 431 1337-1351, 2013
DOI:10.1093/mnras/stt255
View abstract

Blomme R, Naze Y, Volpi D, De Becker M, Prinja RK, Pittard JM, Parkin ER, Absil O The 2.35 year itch of Cygnus OB2 #9 II. Radio monitoring ASTRONOMY&ASTROPHYSICS 550 -, 2013
DOI:10.1051/0004-6361/201220529

Nazé Y, Mahy L, Damerdji Y, Kobulnicky HA, Pittard JM, Parkin ER, Absil O, Blomme R The 2.35 year itch of cygnus OB2 #9: I. Optical and X-ray monitoring Astronomy and Astrophysics 546 -, 2012
DOI:10.1051/0004-6361/201219442
View abstract

Aluzas R, Pittard JM, Hartquist TW, Falle SAEG, Langton R Numerical simulations of shocks encountering clumpy regions Monthly Notices of the Royal Astronomical Society 425 2212-2227, 2012
DOI:10.1111/j.1365-2966.2012.21598.x
View abstract

Van Den Heever SP, Van Der Walt DJ, Pittard JM, Hoare MG On the Methanol masers in G9.62+0.20E: Preliminary colliding-wind binary (CWB) calculations Proceedings of the International Astronomical Union 8 112-113, 2012
DOI:10.1017/S174392131200676X
View abstract

Pittard JM, Rogers H Feedback from Winds and Supernovae in Massive Stellar Clusters, 2012

Pittard JM, Rogers H Stellar wind and supernova feedback from massive stars, 2012
DOI:10.1017/S1743921314012289
View abstract

Fahed R, Moffat AFJ, Zorec J, Eversberg T, Chene AN, Alves F, Arnold W, Bergmann T, Corcoran MF, Viegas NGC, Dougherty SM, Fernando A, Fremat Y, Carreira LFG, Hunger T, Knapen JH, Leadbeater R, Dias FM, Martayan C, Morel T, Pittard JM, Pollock AMT, Rauw G, Reinecke N, Ribeiro J, Romeo N, Sanchez-Gallego JR, dos Santos EM, Schanne L, Stahl O, Stober B, Stober B, Vollmann K, Williams PM, Collaboration MP-A 2009: A Colliding-Wind Odyssey, 2012

Pittard JM, Hartquist TW, Dyson JE, Falle SAEG The turbulent destruction of interstellar clouds ASTROPHYS SPACE SCI 336 239-244, 2011
DOI:10.1007/s10509-010-0526-4

Fahed R, Moffat AFJ, Zorec J, Eversberg T, Chene AN, Alves F, Arnold W, Bergmann T, Corcoran MF, Viegas NGC, Dougherty SM, Fernando A, Fremat Y, Carreira LFG, Hunger T, Knapen JH, Leadbeater R, Dias FM, Martayan C, Morel T, Pittard JM, Pollock AMT, Rauw G, Reinecke N, Ribeiro J, Romeo N, Sanchez-Gallego JR, dos Santos EM, Schanne L, Stahl O, Stober B, Stober B, Vollmann K, Williams PM, Collaboration MP-A Spectroscopy of the archetype colliding-wind binary WR 140 during the 2009 January periastron passage MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 418 2-13, 2011
DOI:10.1111/j.1365-2966.2011.19035.x

Townsley LK, Broos PS, Corcoran MF, Feigelson ED, Gagne M, Montmerle T, Oey MS, Smith N, Garmire GP, Getman KV, Povich MS, Evans NR, Naze Y, Parkin ER, Preibisch T, Wang JF, Wou SJ, Chu YH, Cohen DH, Gruendl RA, Hamaguchi K, King RR, Mac Low MM, McCaughrean MJ, Moffat AFJ, Oskinova LM, Pittard JM, Stassun KG, Ud-Doula A, Walborn NR, Waldron WL, Churchwell E, Nictiols JS, Owocki SP, Schulz NS AN INTRODUCTION TO THE CHANDRA CARINA COMPLEX PROJECT ASTROPHYS J SUPPL S 194 -, 2011
DOI:10.1088/0067-0049/194/1/1

Naze Y, Broos PS, Oskinova L, Townsley LK, Cohen D, Corcoran MF, Evans NR, Gagne M, Moffat AFJ, Pittard JM, Rauw G, Ud-Doula A, Walborn NR GLOBAL X-RAY PROPERTIES OF THE O AND B STARS IN CARINA ASTROPHYS J SUPPL S 194 -, 2011
DOI:10.1088/0067-0049/194/1/7

Parkin ER, Broos PS, Townsley LK, Pittard JM, Moffat AFJ, Naze Y, Rauw G, Oskinova LM, Waldron WL X-RAY EMISSION FROM THE DOUBLE-BINARY OB-STAR SYSTEM QZ CAR (HD 93206) ASTROPHYS J SUPPL S 194 -, 2011
DOI:10.1088/0067-0049/194/1/8

Townsley LK, Broos PS, Chu YH, Gagne M, Garmire GP, Gruendl RA, Hamaguchi K, Mac Low MM, Montmerle T, Naze Y, Oey MS, Park S, Petre R, Pittard JM THE CHANDRA CARINA COMPLEX PROJECT: DECIPHERING THE ENIGMA OF CARINA'S DIFFUSE X-RAY EMISSION ASTROPHYS J SUPPL S 194 -, 2011
DOI:10.1088/0067-0049/194/1/15

Townsley LK, Broos PS, Chu YH, Gruendl RA, Oey MS, Pittard JM THE INTEGRATED DIFFUSE X-RAY EMISSION OF THE CARINA NEBULA COMPARED TO OTHER MASSIVE STAR-FORMING REGIONS ASTROPHYS J SUPPL S 194 -, 2011
DOI:10.1088/0067-0049/194/1/16

Pittard JM Tails of the unexpected: the interaction of an isothermal shell with a cloud MON NOT R ASTRON SOC 411 L41-L45, 2011
DOI:10.1111/j.1745-3933.2010.00988.x

Parkin ER, Pittard JM, Corcoran MF, Hamaguchi K SPIRALING OUT OF CONTROL: THREE-DIMENSIONAL HYDRODYNAMICAL MODELING OF THE COLLIDING WINDS IN eta CARINAE ASTROPHYS J 726 -, 2011
DOI:10.1088/0004-637X/726/2/105

Parkin ER, Pittard JM, Corcoran MF, Hamaguchi K Spiraling out of control: Three-dimensional hydrodynamical modeling of the colliding winds inη carinae Astrophysical Journal 726 -, 2011
DOI:10.1088/0004-637X/726/2/105
View abstract

Morel T, Rauw G, Eversberg T, Alves F, Arnold W, Bergmann T, Viegas NGC, Fahed R, Fernando A, Carreira LFG, Hunger T, Knapen JH, Leadbeater R, Dias FM, Moffat AFJ, Reinecke N, Ribeiro J, Romeo N, Gallego JS, dos Santos EM, Schanne L, Stahl O, Stober B, Stober B, Vollmann K, Corcoran MF, Dougherty SM, Hamaguchi K, Pittard JM, Pollock AMT, Williams PM Variability monitoring of OB stars during the Mons campaign, 2011
DOI:10.1017/S1743921311010982

Fahed R, Moffat AFJ, Zorec J, Eversberg T, Chene AN, Alves F, Arnold W, Bergmann T, Carreira LFG, Dias FM, Fernando A, Gallego JS, Hunger T, Knapen JH, Leadbeater R, Morel T, Rauw G, Reinecke N, Ribeiro J, Romeo N, dos Santos EM, Schanne L, Stahl O, Stober B, Stober B, Viegas NGC, Vollmann K, Corcoran MF, Dougherty SM, Pittard JM, Pollock AMT, Williams PM Spectroscopic follow-up of the colliding-wind binary WR 140 during the 2009 January periastron passage, 2011
DOI:10.1017/S1743921311011173

Pittard JM Theory and models of colliding stellarwinds Stellar Winds in Interaction - Proceedings of the International ProAm Workshop on Stellar Winds 43-54, 2010
View abstract

Fahed R, Moffat AFJ, Zorec J, Eversberg T, Cheńe AN, Alves F, Arnold W, Bergmann T, Carreira LFG, Dias FM, Fernando A, Gallego JS, Hunger T, Knapen JH, Leadbeater R, Morel T, Rauw G, Reinecke N, Ribeiro J, Romeo N, Dos Santos EM, Schanne L, Stahl O, Stober B, Stober B, Viegas NGC, Vollmann K, Corcoran MF, Dougherty SM, Pittard JM, Pollock AMT,Williams PM The WR 140 periastron passage 2009: First results from mons and other optical sources Stellar Winds in Interaction - Proceedings of the International ProAm Workshop on Stellar Winds 13-18, 2010
View abstract

Corcoran MF, Hamaguchi K, Pittard JM, Russell CMP, Owocki SP, Parkin ER, Okazaki A RECENT X-RAY VARIABILITY OF eta CARINAE: THE QUICK ROAD TO RECOVERY ASTROPHYS J 725 1528-1535, 2010
DOI:10.1088/0004-637X/725/2/1528

Parkin ER, Pittard JM Numerical heat conduction in hydrodynamical models of colliding hypersonic flows MON NOT R ASTRON SOC 406 2373-2385, 2010
DOI:10.1111/j.1365-2966.2010.16888.x

Pittard JM, Hartquist TW, Falle SAEG The turbulent destruction of clouds - II. Mach number dependence, mass-loss rates and tail formation MON NOT R ASTRON SOC 405 821-838, 2010
DOI:10.1111/j.1365-2966.2010.16504.x

Pittard JM 3D models of radiatively driven colliding winds in massive O plus O star binaries - II. Thermal radio to submillimetre emission MON NOT R ASTRON SOC 403 1633-1656, 2010
DOI:10.1111/j.1365-2966.2010.15516.x

Parkin ER, Pittard JM A 3D dynamical model of the colliding winds in binary systems (vol 388, pg 1047, 2008) MON NOT R ASTRON SOC 403 2176-2176, 2010
DOI:10.1111/j.1365-2966.2010.16523.x

Pittard JM, Parkin ER 3D models of radiatively driven colliding winds in massive O plus O star binaries - III. Thermal X-ray emission MON NOT R ASTRON SOC 403 1657-1683, 2010
DOI:10.1111/j.1365-2966.2010.15776.x

Parkin ER, Pittard JM Erratum to A 3D dynamical model of the colliding winds in binary systems [MNRAS, 388, (2008), 1047] Monthly Notices of the Royal Astronomical Society 403 2176-, 2010
DOI:10.1111/j.1365-2966.2010.16523.x

Pittard JM, Hartquist TW, Dyson JE, Falle SAEG The turbulent destruction of interstellar clouds Astrophysics and Space Science 1-6, 2010

Pittard JM, Parkin ER, Corcoran MF, Hamaguchi K, Stevens IR 3-D Modeling and Application, 2010

Pittard JM The non-thermal emission from colliding wind binaries, 2010
View abstract

Parkin ER, Pittard JM, Hoare MG Non-Thermal Emission from Massive Young Stellar Objects, 2010

Pittard JM Models of the Non-Thermal Emission from Early-Type Binaries, 2010

Parkin ER, Pittard JM, Hoare MG, Wright NJ, Drake JJ The interactions of winds from massive young stellar objects: X-ray emission, dynamics and cavity evolution MON NOT R ASTRON SOC 400 629-645, 2009
DOI:10.1111/j.1365-2966.2009.15504.x

Pittard JM 3D models of radiatively driven colliding winds in massive O plus O star binaries - I. Hydrodynamics MON NOT R ASTRON SOC 396 1743-1763, 2009
DOI:10.1111/j.1365-2966.2009.14857.x

Parkin ER, Pittard JM, Corcoran MF, Hamaguchi K, Stevens IR 3D modelling of the colliding winds in eta Carinae - evidence for radiative inhibition MON NOT R ASTRON SOC 394 1758-1774, 2009
DOI:10.1111/j.1365-2966.2009.14475.x

Pittard JM, Falle SAEG, Hartquist TW, Dyson JE The turbulent destruction of clouds - I. A k-epsilon treatment of turbulence in 2D models of adiabatic shock-cloud interactions MON NOT R ASTRON SOC 394 1351-1378, 2009
DOI:10.1111/j.1365-2966.2009.13759.x

De Becker M, Blomme R, Micela G, Pittard JM, Rauw G, Romero GE, Sana H, Stevens IR Non-thermal Processes in Colliding-wind Massive Binaries: the Contribution of Simbol-X to a Multiwavelength Investigation, 2009

Pope ECD, Hartquist TW, Pittard JM Cold gas in the intracluster medium: implications for flow dynamics and powering optical nebulae MON NOT R ASTRON SOC 389 1259-1265, 2008
DOI:10.1111/j.1365-2966.2008.13622.x

Parkin ER, Pittard JM A 3D dynamical model of the colliding winds in binary systems MON NOT R ASTRON SOC 388 1047-1061, 2008
DOI:10.1111/j.1365-2966.2008.13511.x

Henley DB, Corcoran MF, Pittard JM, Stevens IR, Hamaguchi K, Gull TR Chandra X-ray grating spectrometry of eta carinae near X-ray minimum. I. Variability of the sulfur and silicon emission lines ASTROPHYS J 680 705-727, 2008

Pope ECD, Pittard JM, Hartquist TW, Falle SAEG The generation of optical emission-line filaments in galaxy clusters MON NOT R ASTRON SOC 385 1779-1791, 2008
DOI:10.1111/j.1365-2966.2008.12963.x

Foellmi C, Koenigsberger G, Georgiev L, Toledano O, Marchenko S, Massey P, Dall T, Moffat A, Morrell N, Corcoran M, Kaufer A, Naze Y, Pittard J, St-Louis N, Fullerton A, Massa D, Pollock A New insights into the nature of the SMC WR/LBV binary HD 5980 Revista Mexicana de Astronomía y Astrofísica 44 3-27, 2008

Pittard JM, Dougherty SM PARTICLE ACCELERATION IN THE COLLIDING WIND BINARY WR 140, 2008

Hartquist TW, Dyson JE, Falle SAEG, Pittard JM, Wagner AY Shocks in Multicomponent Astrophysical Media, 2008

De Becker M, Rauw G, Pittard JM, Sana H, Stevens IR, Romero GE INTEGRAL-ISGRI observations of the cygnus OB2 region - Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars ASTRON ASTROPHYS 472 905-910, 2007
DOI:10.1051/0004-6361:20077734

Hamaguchi K, Corcoran MF, Gull T, Ishibashi K, Pittard JM, Hillier DJ, Damineli A, Davidson K, Nielsen KE, Kober GV X-ray spectral variation of eta carinae through the 2003 X-ray minimum ASTROPHYS J 663 522-542, 2007

Pittard JM A Clumping-independent Diagnostic of Stellar Mass-Loss Rates: Rapid Clump Destruction in Adiabatic Colliding Winds The Astrophysical Journal 660 L141-L144, 2007
DOI:10.1086/518365

Pittard JM, Dougherty SM, Coker RF Models of the radio emission from colliding-wind binaries, 2007

St-Louis N, Moffat AFJ, Boisvert P, Marchenko SV, Pittard JM FUSE observations of colliding winds in three magellanic-cloud WR binaries, 2007
View abstract

Pittard JM, Dougherty SM Radio, X-ray, and gamma-ray emission models of the colliding-wind binary WR 140 MON NOT R ASTRON SOC 372 801-826, 2006
DOI:10.1111/j.1365-2966.2006.10888.x

Dyson JE, Pittard JM, Meaburn J, Falle SAEG The tails in the Helix Nebula NGC 7293 ASTRON ASTROPHYS 457 561-567, 2006
DOI:10.1051/0004-6361:20065550

De Becker M, Rauw G, Sana H, Pollock AMT, Pittard JM, Blomme R, Stevens IR, Van Loo S XMM-Newton observations of the massive colliding wind binary and non-thermal radio emitter Cyg OB2#8A [O6If+O5.5III(f)] MON NOT R ASTRON SOC 371 1280-1294, 2006
DOI:10.1111/j.1365-2966.2006.10746.x

Coker RF, Pittard JM The central cluster and X-ray emission from Sgr A* Proceedings of the International Astronomical Union 2 347-348, 2006
DOI:10.1017/S1743921307005388
View abstract

Wagner AY, Falle SAEG, Hartquist TW, Pittard JM Two-fluid models of cosmic ray modified radiative shocks ASTRON ASTROPHYS 452 763-771, 2006
DOI:10.1051/0004-6361:20064885

Pittard JM, Dougherty SM, Coker RF, O'Connor E, Bolingbroke NJ Radio emission models of colliding-wind binary systems. Inclusion of IC cooling ASTRON ASTROPHYS 446 1001-1019, 2006
DOI:10.1051/0004-6361:20053649

St-Louis N, Moffat AFJ, Marchenko S, Pittard JM, Boisvert P Colliding winds in three Magellanic-Cloud WR binaries, 2006

St-Louis N, Moffat AFJ, Marchenko S, Pittard JM FUSE observations of the SMC 16 day Wolf-Rayet binary Sanduleak 1 (WO4+O4): Atmospheric eclipses and colliding stellar winds ASTROPHYS J 628 953-972, 2005

Pittard JM, Dyson JE, Falle S, Hartquist TW Dynamical and pressure structures in winds with multiple embedded evaporating clumps– I. Two-dimensional numerical simulations Monthly Notices of the Royal Astronomical Society. 361 1077-1090, 2005
DOI:10.1111/j.1365-2966.2005.09268.x

Pittard JM, Dobson MS, Durisen RH, Dyson JE, Hartquist TW, O'Brien JT The shocking properties of supersonic flows: Dependence of the thermal overstability on M, alpha, and T-c/T-0 ASTRON ASTROPHYS 438 11-21, 2005
DOI:10.1051/0004-6361:20042260

De Becker M, Rauw G, Blomme R, Pittard JM, Stevens IR, Runacres MC An XMM-Newton observation of the multiple system HD 167971 (O5-8V+O5-8V+(O81)) and the young open cluster NGC6604 ASTRON ASTROPHYS 437 1029-1046, 2005
DOI:10.1051/0004-6361:20052810

Wagner AY, Falle SAEG, Hartquist TW, Pittard JM Cosmic ray moderation of the thermal instability ASTRON ASTROPHYS 430 567-569, 2005
DOI:10.1051/0004-6361:20042138

Henley DB, Stevens IR, Pittard JM Probing the wind-wind collision in gamma(2) Velorum with high-resolution Chandra X-ray spectroscopy: evidence for sudden radiative braking and non-equilibrium ionization MON NOT R ASTRON SOC 356 1308-1326, 2005
DOI:10.1111/j.1365-2966.2004.08556.x

Corcoran MF, Hamaguchi K, Pollock AMT, Pittard JM, Stevens IR, Henley DB, Moffat AFJ, Marchenko S Colliding wind binary X-ray sources Proceedings of the International Astronomical Union 1 35-36, 2005
DOI:10.1017/S1743921306007757
View abstract

Corcoran MF, Hamaguchi K, Gull T, Davidson K, Petre R, Hillier DJ, Smith N, Damineli A, Morse JA, Walborn NR, Verner E, Collins N, White S, Pittard JM, Weis K, Bomans D, Butt Y Waiting in the wings: Reflected X-ray emission from the Homunculus nebula ASTROPHYS J 613 381-386, 2004

Petitjean P, Aracil B The ratio of the C IV$\lambda\lambda$1548,1550 rest-wavelengths from high-redshift QSO absorption lines Astronomy&Astrophysics 422 523-526, 2004
DOI:10.1051/0004-6361:20041030

De Becker A, Rauw G, Blomme R, Waldron WL, Sana H, Pittard JM, Eenens P, Stevens IR, Runacres MC, Van Loo S, Pollock AMT Quasi-simultaneous XMM-Newton and VLA observation of the non-thermal radio emitter HD 168112 (05.5III(f(+))) ASTRON ASTROPHYS 420 1061-1077, 2004
DOI:10.1051/0004-6361:20041030

De Becker M, Rauw G, Pittard JM, Antokhin II, Stevens IR, Gosset E, Owocki SP An XMM-Newton observation of the massive binary HD 159176 ASTRON ASTROPHYS 416 221-233, 2004
DOI:10.1051/0004-6361:20031710

Pittard JM, Hartquist TW, Ashmore I, Byfield A, Dyson JE, Falle SAEG Mass-loaded spherical accretion flows ASTRON ASTROPHYS 414 399-408, 2004
DOI:10.1051/0004-6361:20034134

Henley DB, Stevens IR, Pittard JM Theoretical X-ray line profiles from colliding wind binaries MON NOT R ASTRON SOC 346 773-786, 2003

Pittard JM, Corcoran MF The wind properties of eta Carinae Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias 15 81-, 2003
View abstract

Pittard JM, Dyson JE, Falle SAEG, Hartquist TW Supernova remnant evolution in an AGN environment Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias 15 317-322, 2003
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Dougherty SM, Pittard JM, Coker R, Williams PM, Kasian L, Lloyd HM Radio emission models of colliding-wind binaries Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias 15 56-58, 2003
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Dougherty SM, Pittard JM, Kasian L, Coker RF, Williams PM, Lloyd HM Radio emission models of colliding-wind binary systems ASTRON ASTROPHYS 409 217-233, 2003
DOI:10.1051/0004-6361:20031048

Pittard JM Eta Carinae shows "model" behaviour ASTRON GEOPHYS 44 5-5, 2003

Pittard JM, Arthur SJ, Dyson JE, Falle SAEG, Hartquist TW, Knight MI, Pexton M The evolution of mass loaded supernova remnants - II. Temperature dependent mass injection rates ASTRON ASTROPHYS 401 1027-1038, 2003
DOI:10.1051/0004-6361:20030157

Pittard JM, Hartquist TW, Ashmore I The thermal stability of mass-loaded flows Astronomy and Astrophysics 408 813-816, 2003
DOI:10.1051/0004-6361:20030993

Rauw G, De Becker M, Gosset E, Pittard JM, Stevens IR An XMM-Newton observation of the very young open cluster NGC 6383 Astronomy and Astrophysics 407 pp.925-, 2003
DOI:10.1051/0004-6361:20030910

Hartquist TW, Pittard JM Molecules in the cosmos - A volume honouring David A. Williams ASTROPHYS SPACE SCI 285 611-612, 2003

Pittard JM Enigmatic Eta Carinae Astronomy&Geophysics 44 17-22, 2003
DOI:10.1046/j.1468-4004.2003.44117.x

Pittard JM, Dyson JE, Falle S, Hartquist TW The formation of broad emission line regions in supernova-QSO wind interactions - II. 2D calculations Astronomy and Astrophysics 408 79-94, 2003
DOI:10.1051/0004-6361:20030767

Moffat AFJ, Corcoran MF, Stevens IR, Skalkowski G, Marchenko SV, Mucke A, Ptak A, Koribalski BS, Brenneman L, Mushotzky R, Pittard JM, Pollock AMT, Brandner W Galactic starburst NGC 3603 from X-rays to radio ASTROPHYS J 573 191-198, 2002

Pittard JM, Stevens IR The dominant X-ray wind in massive star binaries ASTRON ASTROPHYS 388 L20-L23, 2002
DOI:10.1051/0004-6361:20020583

Kurosawa R, Hillier DJ, Pittard JM Mass-loss rate determination for the massive binary V444 Cygni using 3-D Monte-Carlo simulations of line and polarization variability ASTRON ASTROPHYS 388 957-977, 2002
DOI:10.1051/0004-6361:20020443

Pittard JM, Corcoran MF In hot pursuit of the hidden companion of eta Carinae: An X-ray determination of the wind parameters ASTRON ASTROPHYS 383 636-647, 2002
DOI:10.1051/0004-6361:20020025

Coker RF, Pittard JM, Kastner JH The Galactic Centre source IRS 13E: A post-LBV Wolf-Rayet colliding wind binary? ASTRON ASTROPHYS 383 568-573, 2002
DOI:10.1051/0004-6361:20011745

Corcoran MF, Moffat AFJ, Pittard JM, Pollock AMT, Skinner SL, Stevens IR, Williams PM High-resolution X-ray imaging of the colliding wind shock in WR147 Astronomy and Astrophysics 388 335-345, 2002
DOI:10.1051/0004-6361:20020465

Rauw G, Blomme R, Corcoran MF, Pittard JM, Pollock AMT, Runacres MC, Sana H, Stevens IR, Van Loo S, waldron WL A multi-wavelength investigation of the non-thermal radio emitting O-star 9 Sgr Astronomy and Astrophysics 394 993-1008, 2002
DOI:10.1051/0004-6361:20020926

Blomme R, Corcoran MF, Gosset E, Naze Y, Pittard JM, Rauw G, Runacres MC, Stevens IR An XMM-Newton observation of the Lagoon Nebula and the very young open cluster NGC6530 Astronomy and Astrophysics 395 499-513, 2002
DOI:10.1051/0004-6361:20021230

Moffat AFJ, Brandner W, Brenneman L, Corcoran P, Koribalski BS, Marcheno SV, Mucke A, Mushotzky R, Pittard JM, Pollock AMT, Ptak A, Skalkowski G, Stevens IR Galactic starburst NGC 3603 from X-rays to radio The Astrophysical Journal 573 191-198, 2002
DOI:10.1086/340491

Falle S, Coker RF, Pittard JM, Dyson JE, Hartquist TW Numerical simulations of tail formation in wind interactions with injected material Monthly Notices of the Royal Astronomical Society. 329 670-674, 2002
DOI:10.1046/j.1365-8711.2002.05011.x

Pittard JM, Dyson JE, Falle SAEG, Hartquist TW The formation of broad emission line regions in supernova-QSO wind interactions ASTRON ASTROPHYS 375 827-839, 2001

Pittard JM, Hartquist TW, Dyson JE Self-similar evolution of wind-blown bubbles with mass loading by hydrodynamic ablation ASTRON ASTROPHYS 373 1043-1055, 2001
DOI:10.1051/0004-6361:20010673

Pittard JM, Dyson JE, Hartquist TW Self-similar evolution of wind-blown bubbles with mass-loading by conductive evaporation ASTRON ASTROPHYS 367 1000-1010, 2001

Pittard JM, Dyson JE, Hartquist TW Self-similar evolution of remnants with conductively driven mass-loading ASTROPHYS SPACE SCI 278 269-281, 2001

Pittard JM, Stevens IR, Corcoran MF, Gayley KG, Marchenko SV, Rauw G Coordinated monitoring of the eccentric O-star binary Iota Orionis: the X-ray analysis MON NOT R ASTRON SOC 319 137-153, 2000

Coker R, Pittard J An X-ray binary model for the Galactic Center source IRS 13E Astronomy and Astrophysics 361 L13-L16, 2000

Marchenko S, Rauw G, Antokhina E, Antokhin I, Ballereau D, Chauville J, Corcoran M, Costero R, Echevarria J, Eversberg T, Gayley K, Koenigsberger G, Miroshnichenko A, Moffat A, Morrell N, Morrison N, Mulliss C, Pittard J, Stevens I, Vreux J-M, Zorec J Coordinated monitoring of the eccentric O-star binary Iota Orionis: optical spectroscopy and photometry Monthly Notices of the Royal Astronomical Society 317 333-342, 2000

Rauw G, Stevens IR, Pittard JM, Corcoran MF ASCA spectroscopy of the hard X-ray emission from the colliding wind interaction inγ2Velorum Monthly Notices of the Royal Astronomical Society 316 129-136, 2000
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Stevens IR, Pittard JM Eta carinae: A colliding wind binary?, 1999

Stevens IR, Pittard JM Colliding stellar winds: recent advances in modelling, 1999

Pittard JM, Stevens IR 3D hydrodynamic simulations of colliding winds in V444 Cygni, 1999

Pittard JM Hydrodynamic simulations of the colliding winds in Iota Orionis Monthly Notices of the Royal Astronomical Society 300 479-492, 1998
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Pittard JM, Stevens IR, Corcoran MF, Ishibashi K The X-ray light curve of Eta Carinae Monthly Notices of the Royal Astronomical Society 299 -, 1998
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Pittard JM, Stevens LR Theoretical X-ray properties of colliding stellar winds in O+O star binaries Monthly Notices of the Royal Astronomical Society 292 298-316, 1997
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