arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0801.1264astro-ph
收藏

软X射线强宽吸收线类星体的发现

The Discovery of Soft X-ray Loud Broad Absorption Line Quasars

Kajal K. Ghosh, Brian Punsly

摘要:

十多年来,人们已经知道BALQSO(宽吸收线类星体)与其他类星体相比,在X射线区域中,特别是在软带($< $ 1 keV)中,衰减很大。使用X射线选择技术,我们发现了“软X射线响亮”BALQSO,根据定义,具有软X射线(0.3千电子伏),紫外线($3000 Å$)通量密度比高于典型的nonBAL无线电安静类星体。我们的3个源的样本包括一个LoBALQSO(低电离BALQSO),它通常被认为是最高度衰减的X射线。这三个类星体是唯一已知的具有X射线观测结果的BALQSO,这些观测结果与没有内在软X射线吸收相一致。大X射线光度的存在和它对潜在的紫外吸收气体呈现的硬电离连续性与有利于BAL风(特别是LoBALs)内的线驱动力的电离状态相冲突。

英文摘要:

It is been known for more than a decade that BALQSOs (broad absorption line quasars) are highly attenuated in the X-ray regime compared to other quasars, especially in the soft band ($< $ 1 keV). Using X-ray selection techniques we have found "soft X-ray loud" BALQSOs that, by definition, have soft X-ray (0.3 keV) to UV ($3000 Å$) flux density ratios that are higher than typical nonBAL radio quiet quasars. Our sample of 3 sources includes one LoBALQSO (low ionization BALQSO) which are generally considered to be the most highly attenuated in the X-rays. The three QSOs are the only known BALQSOs that have X-ray observations that are consistent with no intrinsic soft X-ray absorption. The existence of a large X-ray luminosity and the hard ionizing continuum that it presents to potential UV absorption gas is in conflict with the ionization states that are conducive to line driving forces within BAL winds (especially for the LoBALs).

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。

↑