Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Pittard, Julian M."'
Autor:
Pittard, Julian M.
We investigate the effect of mass-loading from embedded clouds on the evolution of supernova remnants and on the energy and momentum that they inject into an inhomogeneous interstellar medium. We use 1D hydrodynamical calculations and assume that the
Externí odkaz:
http://arxiv.org/abs/1907.03519
Autor:
Hamaguchi, Kenji, Corcoran, Michael F., Pittard, Julian M., Sharma, Neetika, Takahashi, Hiromitsu, Russell, Christopher M. P., Grefenstette, Brian W., Wik, Daniel R., Gull, Theodore R., Richardson, Noel D., Madura, Thomas I., Moffat, Anthony F. J.
Publikováno v:
Nature Astronomy 2 (2018) 731-736
Cosmic-ray acceleration has been a long-standing mystery and despite more than a century of study, we still do not have a complete census of acceleration mechanisms. The collision of strong stellar winds in massive binary systems creates powerful sho
Externí odkaz:
http://arxiv.org/abs/1904.09219
Autor:
Naze, Yael, Koenigsberger, Gloria, Pittard, Julian M., Parkin, Elliot Ross, Rauw, Gregor, Corcoran, Michael F., Hillier, D. John
Publikováno v:
ApJ, 853, 164 (11p, 2018)
We report on the first detection of a global change in the X-ray emitting properties of a wind-wind collision, thanks to XMM-Newton observations of the massive SMC system HD5980. While its lightcurve had remained unchanged between 2000 and 2005, the
Externí odkaz:
http://arxiv.org/abs/1712.05625
We have used the AMR hydrodynamic code, MG, to perform 3D hydrodynamic simulations with self-gravity of stellar feedback in a spherical clumpy molecular cloud formed through the action of thermal instability. We simulate the interaction of the mechan
Externí odkaz:
http://arxiv.org/abs/1706.01844
Autor:
Hamaguchi, Kenji, Corcoran, Michael F., Gull, Theodore R., Takahashi, Hiromitsu, Grefenstette, Brian W., Yuasa, Takayuki, Stuhlinger, Martin, Russell, Christopher M. P., Moffat, Anthony F. J., Sharma, Neetika, Madura, Thomas I., Richardson, Noel D., Groh, Jose, Pittard, Julian M., Owocki, Stanley
Publikováno v:
The Astrophysical Journal, 817:23, 2016 January 20
The evolved, massive highly eccentric binary system, eta Carinae, underwent a periastron passage in the summer of 2014. We obtained two coordinated X-ray observations with XMM-Newton and NuSTAR during the elevated X-ray flux state and just before the
Externí odkaz:
http://arxiv.org/abs/1602.01148
Autor:
Hamaguchi, Kenji, Corcoran, Michael F., Takahashi, Hiromitsu, Yuasa, Takayuki, Ishida, Manabu, Gull, Theodore R., Pittard, Julian M., Russell, Christopher M. P., Madura, Thomas I.
Publikováno v:
Astrophysical Journal, 2014, 795, 119
The Suzaku X-ray observatory monitored the supermassive binary system Eta Carinae 10 times during the whole 5.5 year orbital cycle between 2005-2011. This series of observations presents the first long-term monitoring of this enigmatic system in the
Externí odkaz:
http://arxiv.org/abs/1410.6171
Autor:
Lomax, Jamie R., Naze, Yael, Hoffman, Jennifer L., Russell, Christopher M. P., De Becker, Michael, Corcoran, Michael F., Davidson, James W., Neilson, Hilding R., Owocki, Stan, Pittard, Julian M., Pollock, Andy M. T.
Publikováno v:
A&A 573, A43 (2015)
We present results from a study of the eclipsing, colliding-wind binary V444 Cyg that uses a combination of X-ray and optical spectropolarimetric methods to describe the 3-D nature of the shock and wind structure within the system. We have created th
Externí odkaz:
http://arxiv.org/abs/1410.6117
Autor:
Hamaguchi, Kenji, Corcoran, Michael F., Russell, Christopher, Pollock, Andrew M. T., Gull, Theodore R., Teodoro, Mairan, Madura, Thomas I., Damineli, Augusto, Pittard, Julian M.
X-ray emission from the supermassive binary system Eta Carinae declines sharply around periastron. This X-ray minimum has two distinct phases - the lowest flux phase in the first ~3 weeks and a brighter phase thereafter. In 2009, the Chandra X-ray Ob
Externí odkaz:
http://arxiv.org/abs/1401.5870
Autor:
Townsley, Leisa K., Broos, Patrick S., Chu, You-Hua, Gruendl, Robert A., Oey, M. S., Pittard, Julian M.
The Chandra Carina Complex Project (CCCP) has shown that the Carina Nebula displays bright, spatially-complex soft diffuse X-ray emission. Here we `sum up' the CCCP diffuse emission work by comparing the global morphology and spectrum of Carina's dif
Externí odkaz:
http://arxiv.org/abs/1103.1606
Autor:
Townsley, Leisa K., Broos, Patrick S., Chu, You-Hua, Gagné, Marc, Garmire, Gordon P., Gruendl, Robert A., Hamaguchi, Kenji, Mac Low, Mordecai-Mark, Montmerle, Thierry, Nazé, Yaël, Oey, M. S., Park, Sangwook, Petre, Robert, Pittard, Julian M.
Publikováno v:
ApJS, 194, 15 (23p, 2011)
We present a 1.42 square degree mosaic of diffuse X-ray emission in the Great Nebula in Carina from the Chandra X-ray Observatory Advanced CCD Imaging Spectrometer camera. After removing >14,000 X-ray point sources from the field, we smooth the remai
Externí odkaz:
http://arxiv.org/abs/1103.0764