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; Kato, Y.1,12; Kawabe, R.1; Kohno, K.8; Kubo, M.1; Lehnert, M.13,14; Malkan, M.15; Menten, K. M.3; Nagao, T.16; Norris, R. P.17,18; Ouchi, M.19; Saito, T.20; Tamura, Y.8,21; Taniguchi, Y.22; Umehata, H.22; Weiss, A.3
Corresponding AuthorAo, Y.()
AbstractWe 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.
Keywordgalaxies: active galaxies: formation galaxies: high-redshift galaxies: ISM infrared: galaxies
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000425474700002
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorAo, Y.
Affiliation1.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
11.Univ Hertfordshire, Sch Phys Astron & Math, Ctr Astrophys Res, Coll Lane, Hatfield AL10 9AB, Herts, England
12.Univ Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1330033, Japan
13.CNRS, Inst Astrophys Paris, 98Bis Bd Arago, F-75014 Paris, France
14.Univ Paris 06, 98Bis Bd Arago, F-75014 Paris, France
15.Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
16.Ehime Univ, Res Ctr Space & Cosm Evolut, Bunkyo Cho 2-5, Matsuyama, Ehime 7908577, Japan
17.CSIRO Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia
18.Western Sydney Univ, Locked Bag 1797, Penrith, NSW 1797, Australia
19.Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778582, Japan
20.Univ Hyogo, Ctr Astron, Nishi Harima Astron Observ, 407-2 Nichigaichi,Sayo Cho, Sayo, Hyogo 6795313, Japan
21.Nagoya Univ, Sch Sci, Dept Phys, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648602, Japan
22.Open Univ Japan, Mihama Ku, 2-11 Wakaba, Chiba 2618586, Japan
Recommended Citation
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.
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