arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新，休息一下吧，周末愉快~~
arXiv 0811.2963astro-ph
收藏

GRS 1915+105的多波长X射线/中红外观测

Multi-wavelength X-ray/mid-infrared observations of GRS 1915+105

F. Rahoui, S. Chaty, J. Rodriguez, Y. Fuchs, I. F. Mirabel

备注：
8 pages, 5 figures, 2 tables, Seventh Microquasar Workshop proceeding
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

我们报告的中红外（MIR）和X射线观测的GRS 1915+105，我们进行了2004年10月2日和2006年6月5日之间的初步结果。我们的主要目标是研究它的可变性，检测尘埃的存在，并调查MIR和X射线发射之间的可能联系。我们使用安装在斯皮策太空望远镜上的IRAC光度计和IRS光谱仪对GRS 1915+105进行了光度和光谱观测。我们用RXTE和INTEGRAL获得的准同步高能数据完成了我们的MIR数据集。在硬态下，我们在GRS 1915+105的MIR光谱中检测到PAH发射特征，这证明了系统中存在尘埃。尘埃证实了在硬态的温暖的MIR过量的宽带光谱能量分布的GRS 1915 - 105的检测。这种过量不能用致密喷流的MIR同步辐射来解释，因为Ryle望远镜在15 GHz时没有检测到GRS 1915+105。我们还表明，GRS 1915+105的MIR发射是强烈可变的，它可能与软X射线发射，因为它在软状态下增加。我们认为，除了尘埃排放，部分的和平号多余的软状态是非热的，可能是由于自由-自由发射的X射线驱动的风或X射线再加工的吸积盘的外部。

英文摘要：

We report preliminary results of mid-infrared (MIR) and X-ray observations of GRS 1915+105 that we carried out between 2004 October 2 and 2006 June 5. Our main goals were to study its variability, to detect the presence of dust, and to investigate the possible links between MIR and X-ray emissions. We performed photometric and spectroscopic observations of GRS 1915+105, using the IRAC photometer and the IRS spectrometer mounted on the Spitzer Space Telescope. We completed our set of MIR data with quasi-simultaneous high-energy data obtained with RXTE and INTEGRAL. In the hard state, we detect PAH emission features in the MIR spectrum of GRS 1915+105, which prove the presence of dust in the system. The dust is confirmed by the detection in the hard state of a warm MIR excess in the broadband spectral energy distribution of GRS 1915 105. This excess cannot be explained by the MIR synchrotron emission from the compact jets as GRS 1915+105 was not detected at 15 GHz with the Ryle telescope. We also show that the MIR emission of GRS 1915+105 is strongly variable; it is likely correlated to the soft X-ray emission as it increases in the soft state. We suggest that, beside the dust emission, part of the MIR excess in the soft state is non-thermal, and could be due either to free-free emission from an X-ray driven wind or X-ray reprocessing in the outer part of the accretion disc.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑