今天是   收藏本站 | 联系我们 | 上海天文台 | English
首页 研究领域 研究团组 科研人员 学术活动 工作机会 内部信息
  每周简讯
 
25/06/2018-29/06/2018

SHAO Astrophysics Colloquium

Title Hot dust-obscured galaxies: Catching the maximum SMBH accretion during galaxy evolution

Speaker: Jingwen Wu (NAOC)

Time: 3 pm, June 28 Thursday

Location: Lecture Hall, 3rd floor

Abstract:  

Hot, Dust-Obscured Galaxies, or ”Hot DOGs” are a rare, dusty, hyperluminous galaxy population discovered by the WISE mission. Peaking at redshifts 2-3, they are among the most luminous galaxies in the universe. They likely signpost a key evolutionary stage linking obscured and unobscured quasars. Their high luminosities come from the accretion onto highly obscured super massive black holes (SMBHs).  Our recent studies to measure the BH masses and Eddington ratios of a pilot sample of Hot DOGs (via broad Hα lines) find that Hot DOGs may be accreting at highest possible rates (close to Eddington limit or even above) for their BHs; a similar property is also seen in known z~6 quasars. Our results agree with the expectations of the current merger- driven galaxy evolution model. We propose a ”SMGs/DOGs–Hot DOGs–red quasars–regular quasars” evolutionary sequence.  In this talk, I will introduce how to explain these findings in the context of evolution of obscured and unobscured quasars.

 

Group meetings

Black hole Accretion and High-energy Astrophysics /Black Hole Feedback and Cosmic Ray Astrophysics Seminar

Location: 1608

Time: 14:00-16:00, Wednesday, June 27

Speaker: Can Cui

The physics of galactic winds driven by active galactic nuclei

http://adsabs.harvard.edu/abs/2012MNRAS.425..605F

Speaker: Maochun Wu

Simulations of Jet Heating in Galaxy Clusters: Successes and Numerical Challenges

http://adsabs.harvard.edu/abs/2018arXiv180506461M

 

附件下载
©2008-2013 中国科学院上海天文台 版权所有
地址:上海市南丹路80号 邮编:200030 邮件:shao@shao.ac.cn