Deep Submillimeter and Radio Observations in the SSA22 Field. I. Powering Sources and the Ly alpha Escape Fraction of Ly alpha Blobs

doi:10.3847/1538-4357/aa960f

	Deep Submillimeter and Radio Observations in the SSA22 Field. I. Powering Sources and the Ly alpha Escape Fraction of Ly alpha Blobs
	Ao, Y.1,2; Matsuda, Y.1; Henkel, C.3,4; Iono, D.1; Alexander, D. M.5; Chapman, S. C.6; Geach, J.7; Hatsukade, B.8; Hayes, M.9,10; Hine, N. K.11
刊名	ASTROPHYSICAL JOURNAL
	2017-12-01
卷号	850 期号:2 页码:16
关键词	galaxies: active galaxies: formation galaxies: high-redshift galaxies: ISM infrared: galaxies
ISSN号	0004-637X
DOI	10.3847/1538-4357/aa960f
通讯作者	Ao, Y.()
英文摘要	We study the heating mechanisms and Ly alpha escape fractions of 35 Ly alpha blobs (LABs) at z approximate to 3.1 in the SSA22 field. Dust continuum sources have been identified in 11 of the 35 LABs, all with star formation rates (SFRs) above 100M(circle dot) yr(-1). Likely radio counterparts are detected in 9 out of 29 investigated LABs. The detection of submillimeter dust emission is more linked to the physical size of the Ly alpha emission than to the Ly alpha luminosities of the LABs. A radio excess in the submillimeter/ radio-detected LABs is common, hinting at the presence of active galactic nuclei. Most radio sources without X-ray counterparts are located at the centers of the LABs. However, all X-ray counterparts avoid the central regions. This may be explained by absorption due to exceptionally large column densities along the line-of-sight or by LAB morphologies, which are highly orientation dependent. The median Lya escape fraction is about 3% among the submillimeter-detected LABs, which is lower than a lower limit of 11% for the submillimeter-undetected LABs. We suspect that the large difference is due to the high dust attenuation supported by the large SFRs, the dense large-scale environment as well as large uncertainties in the extinction corrections required to apply when interpreting optical data.
WOS关键词	EQUAL-TO 2.3 ; STAR-FORMATION ; HIGH-REDSHIFT ; COLD ACCRETION ; MASSIVE GALAXY ; 12 MICRON ; PROTOCLUSTER ; Z=3.1 ; EMISSION ; EMITTERS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000425474700002
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/22328]
专题	中国科学院紫金山天文台
通讯作者	Ao, Y.
作者单位	1.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 3.MPIfR, Hugel 69, D-53121 Bonn, Germany 4.King Abdulaziz Univ, Dept Astron, POB 80203, Jeddah 21589, Saudi Arabia 5.Univ Durham, Dept Phys, Ctr Extragalact Astron, South Rd, Durham DH1 3LE, England 6.Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 4R2, Canada 7.Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England 8.Univ Tokyo, Inst Astron, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan 9.Stockholm Univ, Dept Astron, SE-10691 Stockholm, Sweden 10.AlbaNova Univ Ctr, Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden
推荐引用方式 GB/T 7714	Ao, Y.,Matsuda, Y.,Henkel, C.,et al. Deep Submillimeter and Radio Observations in the SSA22 Field. I. Powering Sources and the Ly alpha Escape Fraction of Ly alpha Blobs[J]. ASTROPHYSICAL JOURNAL,2017,850(2):16.
APA	Ao, Y..,Matsuda, Y..,Henkel, C..,Iono, D..,Alexander, D. M..,...&Weiss, A..(2017).Deep Submillimeter and Radio Observations in the SSA22 Field. I. Powering Sources and the Ly alpha Escape Fraction of Ly alpha Blobs.ASTROPHYSICAL JOURNAL,850(2),16.
MLA	Ao, Y.,et al."Deep Submillimeter and Radio Observations in the SSA22 Field. I. Powering Sources and the Ly alpha Escape Fraction of Ly alpha Blobs".ASTROPHYSICAL JOURNAL 850.2(2017):16.