| タイトル | X-ray Properties of the Young Open Clusters HM1 and IC 2944-2948 |
| 本文（外部サイト） | http://hdl.handle.net/2060/20140011107 |
| 著者（英） | Rauw, G.; Corcoran, Michael F.; Naze, Y.; Sana, H. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2013-07-04 |
| 言語 | eng |
| 内容記述 | Using XMM-Newton data, we study for the first time the X-ray emission of HM1 and IC 2944/2948. Low-mass, pre-main-sequence objects with an age of a few Myr are detected, as well as a few background or foreground objects. Most massive stars in both clusters display the usual high-energy properties of that type of objects, though with log [L(sub X)/L(sub BOL)] apparently lower in HM1 than in IC2944/2948. Compared with studies of other clusters, it seems that a low signal-to-noise ratio at soft energies, due to the high extinction, may be the main cause of this difference. In HM1, the two Wolf-Rayet stars show contrasting behaviors:WR89 is extremely bright, but much softer than WR87. It remains to be seen whether wind-wind collisions or magnetically confined winds can explain these emissions. In IC 2944/2948, the X-ray sources concentrate around HD 101205; a group of massive stars to the north of this object is isolated, suggesting that there exist two subclusters in the field-of-view. |
| NASA分類 | Astronomy; Astrophysics |
| レポートNO | GSFC-E-DAA-TN11226 |
| 権利 | Copyright, Distribution under U.S. Government purpose rights |
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