THE MOST LUMINOUS HEAVILY OBSCURED QUASARS HAVE A HIGH MERGER FRACTION: MORPHOLOGICAL STUDY OF WISE-SELECTED HOT DUST-OBSCURED GALAXIES

	THE MOST LUMINOUS HEAVILY OBSCURED QUASARS HAVE A HIGH MERGER FRACTION: MORPHOLOGICAL STUDY OF WISE-SELECTED HOT DUST-OBSCURED GALAXIES
	Fan, Lulu 1; Han YK(韩云坤)2 ; Fang, Guanwen 3; Gao, Ying 1; Zhang, Dandan 1; Jiang, Xiaoming 1; Wu, Qiaoqian 1; Yang, Jun 1; Li, Zhao 1
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2016-05-10
卷号	822 期号:2
关键词	galaxies: active galaxies: evolution galaxies: high-redshift galaxies: interactions
ISSN号	2041-8205
通讯作者	Fan, LL ; Han, YK
产权排序	第二完成单位
英文摘要	Previous studies have shown that Wide-field Infrared Survey Explorer-selected hyperluminous, hot dust-obscured galaxies (Hot DOGs) are powered by highly dust-obscured, possibly Compton-thick active galactic nuclei (AGNs). High obscuration provides us a good chance to study the host morphology of the most luminous AGNs directly. We analyze the host morphology of 18 Hot DOGs at z similar to 3 using Hubble Space Telescope/WFC3 imaging. We find that Hot DOGs have a high merger fraction (62 +/- 14%). By fitting the surface brightness profiles, we find that the distribution of Sersic indices in our Hot DOG sample peaks around 2, which suggests that most Hot DOGs have transforming morphologies. We also derive the AGN bolometric luminosity (similar to 10(14) L-circle dot) of our Hot DOG sample by using IR spectral energy distributions decomposition. The derived merger fraction and AGN bolometric luminosity relation is well consistent with the variability-based model prediction. Both the high merger fraction in an IR-luminous AGN sample and relatively low merger fraction in a UV/optical-selected, unobscured AGN sample can be expected in the merger-driven evolutionary model. Finally, we conclude that Hot DOGs are merger-driven and may represent a transit phase during the evolution of massive galaxies, transforming from the dusty starburst-dominated phase to the unobscured QSO phase.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	SUPERMASSIVE BLACK-HOLES ; SIMILAR-TO 2 ; ACTIVE GALACTIC NUCLEUS ; HOST GALAXIES ; STAR-FORMATION ; MAJOR MERGERS ; FOLLOW-UP ; AGN ; CANDELS ; CONNECTION
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.3847/2041-8205/822/2/L32/meta
语种	英语
WOS记录号	WOS:000376173300012
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9600]
专题	云南天文台_大样本恒星演化研究组
作者单位	1.Shandong Provincial Key Lab of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Science, Shandong University, Weihai 264209, China 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China 3.Institute for Astronomy and History of Science and Technology, Dali University, Dali 671003, China
推荐引用方式 GB/T 7714	Fan, Lulu,Han YK,Fang, Guanwen,et al. THE MOST LUMINOUS HEAVILY OBSCURED QUASARS HAVE A HIGH MERGER FRACTION: MORPHOLOGICAL STUDY OF WISE-SELECTED HOT DUST-OBSCURED GALAXIES[J]. ASTROPHYSICAL JOURNAL LETTERS,2016,822(2).
APA	Fan, Lulu.,Han YK.,Fang, Guanwen.,Gao, Ying.,Zhang, Dandan.,...&Li, Zhao.(2016).THE MOST LUMINOUS HEAVILY OBSCURED QUASARS HAVE A HIGH MERGER FRACTION: MORPHOLOGICAL STUDY OF WISE-SELECTED HOT DUST-OBSCURED GALAXIES.ASTROPHYSICAL JOURNAL LETTERS,822(2).
MLA	Fan, Lulu,et al."THE MOST LUMINOUS HEAVILY OBSCURED QUASARS HAVE A HIGH MERGER FRACTION: MORPHOLOGICAL STUDY OF WISE-SELECTED HOT DUST-OBSCURED GALAXIES".ASTROPHYSICAL JOURNAL LETTERS 822.2(2016).