| タイトル | The X-ray Variability of Eta Car, 1996-2010 |
| 著者（英） | Hamaguchi, K.; Gull, T.; Owocki, S.; Pittard, J.; Corcoran, Michael F. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2010-01-03 |
| 言語 | eng |
| 内容記述 | X-ray photometry in the 2-10 keY band of the the supermassive binary star Eta Car has been measured with the Rossi X-ray Timing Explorer from 1996-2010. The ingress to X-ray minimum is consistent with a period of 2024 days. The 2009 X-ray minimum began on January 162009 and showed an unexpectedly abrupt recovery starting after 12 Feb 2009. The X-ray colors become harder about half-way through all three minima and continue until flux recovery. The behavior of the fluxes and X-ray colors for the most recent X-ray minimum, along with Chandra high resolution grating spectra at key phases suggests a significant change in the inner wind of Eta Car, a possible indicator that the star is entering a new unstable phase of mass loss. |
| NASA分類 | Astronomy |
| 権利 | Copyright |
|
