arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0909.5345astro-ph.CO
收藏

Swift/BAT探测到的17个活动星系核的精确分类

Accurate classification of 17 AGNs detected with Swift/BAT

P. Parisi, N. Masetti, E. Jiménez-Bailón, V. Chavushyan, A. Malizia, R. Landi, M. Molina, M. Fiocchi, E. Palazzi, L. Bassani, A. Bazzano, A. J. Bird, A. J. Dean… 展开作者

P. Parisi, N. Masetti, E. Jiménez-Bailón, V. Chavushyan, A. Malizia, R. Landi, M. Molina, M. Fiocchi, E. Palazzi, L. Bassani, A. Bazzano, A. J. Bird, A. J. Dean, G. Galaz, E. Mason, D. Minniti, L. Morelli, J. B. Stephen, P. Ubertini

摘要:

通过光学活动在5个望远镜位于北半球和南半球,加上档案数据从两个在线巡天,我们已经获得了光谱学的17个对应的怀疑或研究不足的硬X射线发射活动星系核(AGN)与雨燕/BAT检测,以确定或更好地分类它们的性质。我们发现,我们的样本的7个源是1型活动星系核,9个是2型活动星系核,和1个对象是一个X射线明亮的光学正常星系,这些对象的红移位于0.012和0.286之间的范围。对于所有这些源,还进行了X射线数据分析,以估计它们的吸收柱,并寻找可能的康普顿厚候选者。在我们的第二类天体中,我们没有发现任何明显的康普顿厚度的活动星系核,但9个中至少有6个是高度吸收的(N_H > 10^23 cm^-2),而一个不需要内禀吸收;即,它似乎是一个裸露的塞弗特2星系。

英文摘要:

Through an optical campaign performed at 5 telescopes located in the northern and the southern hemispheres, plus archival data from two on line sky surveys, we have obtained optical spectroscopy for 17 counterparts of suspected or poorly studied hard X-ray emitting active galactic nuclei (AGNs) detected with Swift/BAT in order to determine or better classify their nature. We find that 7 sources of our sample are Type 1 AGNs, 9 are Type 2 AGNs, and 1 object is an X-ray bright optically normal galaxy; the redshifts of these objects lie in a range between 0.012 and 0.286. For all these sources, X-ray data analysis was also performed to estimate their absorption column and to search for possible Compton thick candidates. Among our type 2 objects, we did not find any clear Compton thick AGN, but at least 6 out of 9 of them are highly absorbed (N_H > 10^23 cm^-2), while one does not require intrinsic absorption; i.e., it appears to be a naked Seyfert 2 galaxy.

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。

↑