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 0802.1774astro-ph
收藏

INTEGRAL发现的银河系硬X射线源的多波长观测。I.伴星的性质

Multi-wavelength observations of Galactic hard X-ray sources discovered by INTEGRAL. I. The nature of the companion star

Sylvain Chaty, Farid Rahoui, Cédric Foellmi, John A. Tomsick, Jérôme Rodriguez, Roland Walter

摘要:

内容:INTEGRAL硬X射线天文台通过多波长观测揭示了一批高度模糊的X射线双星系统。先前的研究已经表明,这些来源中有许多是高质量的X射线双星,它们承载着围绕发光和进化的伴星运行的中子星。目的:为了更好地了解这个新发现的人口,我们选择了一个样本的来源,其中一个准确的定位是可以识别的恒星对应物,并揭示伴星和双星系统的性质。研究方法:我们进行了深入的研究样本的13个积分源,通过多波长光学近红外光度和光谱观测,使用EMMI和SofI仪器在ESO NTT望远镜。我们进行了精确的天体测量,并确定了候选对手,我们给出了光学和近红外星等。我们探测到许多谱线,使我们能够确定伴星的光谱类型。我们用恒星黑体拟合了这些源的中红外到光学光谱能量分布。从光谱分析和SED拟合,我们确定了伴星和双星系统的性质。(节略)。

英文摘要:

Context: The INTEGRAL hard X-ray observatory has revealed an emerging population of highly obscured X-ray binary systems through multi-wavelength observations. Previous studies have shown that many of these sources are high-mass X-ray binaries hosting neutron stars orbiting around luminous and evolved companion stars. Aims: To better understand this newly-discovered population, we have selected a sample of sources for which an accurate localisation is available to identify the stellar counterpart and reveal the nature of the companion star and of the binary system. Methods: We performed an intensive study of a sample of thirteen INTEGRAL sources, through multi-wavelength optical to NIR photometric and spectroscopic observations, using EMMI and SofI instruments at the ESO NTT telescope. We performed accurate astrometry and identified candidate counterparts for which we give the optical and NIR magnitudes. We detected many spectral lines allowing us to determine the spectral type of the companion star. We fitted with stellar black bodies the mid-infrared to optical spectral energy distributions of these sources. From the spectral analysis and SED fitting we identified the nature of the companion stars and of the binary systems. (abridged).

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。

↑