Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Pittard, Julian"'
Field's linear analysis of thermal instability is repeated using methods related to Whitham's theory of wave hierarchies, which brings out the physically relevant parameters in a much clearer way than in the original analysis. It is also used for the
Externí odkaz:
http://arxiv.org/abs/2001.01092
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
Publikováno v:
Mon Not R Astron Soc 2017; 466 (4): 4573-4591
We have modelled the evolution of cometary HII regions produced by zero-age main-sequence stars of O and B spectral types, which are driving strong winds and are born off-centre from spherically symmetric cores with power-law ($\alpha = 2$) density s
Externí odkaz:
http://arxiv.org/abs/1703.05379
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:
Sugawara, Yasuharu, Maeda, Yoshitomo, Tsuboi, Yohko, Hamaguchi, Kenji, Corcoran, Michael, Pollock, A. M. T., Moffat, Anthony F. J., Williams, Peredur M., Dougherty, Sean, Pittard, Julian
Suzaku observations of the Wolf-Rayet binary WR 140 (WC7pd+O5.5fc) were made at four different times around periastron passage in 2009 January. The spectra changed in shape and flux with the phase. As periastron approached, the column density of the
Externí odkaz:
http://arxiv.org/abs/1509.08479
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