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arXiv 1802.01907astro-ph.HE
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IGR J19294 +1816:一个新的Be- X射线双星

IGR J19294+1816: a new Be-X ray binary revealed through infrared spectroscopy

J. J. Rodes-Roca, G. Bernabeu, A. Magazzù, J. M. Torrejón, E. Solano

摘要:

这项工作的目的是表征对应的整数高质量X射线双星候选IGR J19294+1816,以建立其真正的性质。我们获得了H波段光谱的选定的对应物获得的NICS仪器安装在国家伽利略望远镜(TNG)3.5米望远镜,这是有史以来第一次采取的红外光谱这个来源。我们从UKIDSS,2 MASS,WISE和NEOWISE数据库中补充了红外光度法的光谱分析。我们将大质量供体分类为Be星。随后,我们计算其距离适当地考虑到污染所产生的拱星信封。研究结果表明,IGR J19294+1816是一个瞬态源,具有B1 Ve施主,距离为$d = 11 \pm 1$ kpc,亮度为$10^{36-37}$ erg s $^{-1}$,显示出Be X射线双星的典型行为。

英文摘要:

The aim of this work is to characterize the counterpart to the INTEGRAL High Mass X-ray Binary candidate IGR J19294+1816 so as to establish its true nature. We obtained H band spectra of the selected counterpart acquired with the NICS instrument mounted on the Telescopio Nazionale Galileo (TNG) 3.5-m telescope which represents the first infrared spectrum ever taken of this source. We complement the spectral analysis with infrared photometry from UKIDSS, 2MASS, WISE and NEOWISE databases. We classify the mass donor as a Be star. Subsequently, we compute its distance by properly taking into account the contamination produced by the circumstellar envelope. The findings indicate that IGR J19294+1816 is a transient source with a B1Ve donor at a distance of $d = 11 \pm 1$ kpc, and luminosities of the order of $10^{36-37}$ erg s$^{-1}$, displaying the typical behaviour of a Be X-ray binary.

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