Galaxy and Quasar Fueling Caught in the Act from the Intragroup to the Interstellar Medium
Galaxy and Quasar Fueling Caught in the Act from the Intragroup to the Interstellar Medium
复制标题
星系和类星体在从集团内部到星际介质的行为中陷入困境
DOI：
10.3847/2041-8213/aaf1cf
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
L. Wisotzki
中科院分区：
文献类型：
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作者：
S. Johnson;Hsiao;L. Straka;J. Schaye;S. Cantalupo;M. Wendt;S. Muzahid;N. Bouch'e;E. C. Herenz;W. Kollatschny;J. Mulchaey;R. Marino;M. Maseda;L. Wisotzki
我们报告在 z ≈ 0.57 星系群中发现了六个空间扩展 (10–100 kpc) 线发射星云，PKS 0405−123 是 z < 1 处最明亮的类星体之一。这一发现是由多单元光谱探测器实现的，并提供了将大规模气流与小于 10 本征 kpc (pkpc) 尺度上的核活动联系起来的诱人证据。其中一个星云呈现出狭窄的丝状形态，向类星体延伸超过 50 pkpc，具有狭窄的内部速度色散 (50 )，并且与任何检测到的星系无关，与冷的群内介质丝一致。其中两个星云位于类星体南北各 10 pkpc 处，具有类似潮汐臂的形态。这两个星云，以及从类星体延伸 60 pkpc 的连续发射臂，是相互作用的特征，预计将重新分配宿主星际介质 (ISM) 中的角动量，以促进恒星形成和类星体在核中的燃料供给。剩下的三个星云是已知最大、最亮的 [O iii] 发射“斑点”（1400-2400 pkpc2），在运动学和形态学上都对应于类星体宿主群中相互作用的星系对，这与剥离的 ISM 而不是大规模类星体外流的产生一致。发光类星体附近这些大尺度和小尺度星云的存在，对大尺度环境对星系和黑洞燃料的影响有显着影响，为之前已知的类星体光度和冷环星系介质之间的相关性提供了自然的解释。
We report the discovery of six spatially extended (10–100 kpc) line-emitting nebulae in the z ≈ 0.57 galaxy group hosting PKS 0405−123, one of the most luminous quasars at z < 1. The discovery is enabled by the Multi Unit Spectroscopic Explorer and provides tantalizing evidence connecting large-scale gas streams with nuclear activity on scales of <10 proper kpc (pkpc). One of the nebulae exhibits a narrow, filamentary morphology extending over 50 pkpc toward the quasar with narrow internal velocity dispersion (50 ) and is not associated with any detected galaxies, consistent with a cool intragroup medium filament. Two of the nebulae are 10 pkpc north and south of the quasar with tidal-arm–like morphologies. These two nebulae, along with a continuum-emitting arm extending 60 pkpc from the quasar, are signatures of interactions that are expected to redistribute angular momentum in the host interstellar medium (ISM) to facilitate star formation and quasar fueling in the nucleus. The three remaining nebulae are among the largest and most luminous [O iii] emitting “blobs” known (1400–2400 pkpc2) and correspond both kinematically and morphologically to interacting galaxy pairs in the quasar host group, consistent with arising from stripped ISM rather than large-scale quasar outflows. The presence of these large- and small-scale nebulae in the vicinity of a luminous quasar bears significantly on the effect of large-scale environment on galaxy and black hole fueling, providing a natural explanation for the previously known correlation between quasar luminosity and cool circumgalactic medium.
DOI：
10.3847/1538-4357/aaaa1b
发表时间：
2017-09
期刊：
The Astrophysical Journal
影响因子：
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作者：
M. Gaspari;M. McDonald;S. Hamer;F. Brighenti;P. Temi;M. Gendron-Marsolais;J. Hlavacek-Larrondo;A. Edge;N. Werner;P. Tozzi;M. Sun;J. Stone;G. Tremblay;M. Hogan;D. Eckert;S. Ettori;H. Yu;V. Biffi;S. Planelles
通讯作者：
M. Gaspari;M. McDonald;S. Hamer;F. Brighenti;P. Temi;M. Gendron-Marsolais;J. Hlavacek-Larrondo;A. Edge;N. Werner;P. Tozzi;M. Sun;J. Stone;G. Tremblay;M. Hogan;D. Eckert;S. Ettori;H. Yu;V. Biffi;S. Planelles