A Subarcsecond Near-infrared View of Massive Galaxies at z > 1 with Gemini Multi-conjugate Adaptive Optics

被引：3

作者：

Lacy, M. ^{[1
]}

Nyland, K. ^{[1
]}

Mao, M. ^{[2
]}

Jagannathan, P. ^{[3
]}

Pforr, J. ^{[4
]}

Ridgway, S. E. ^{[5
]}

Afonso, J. ^{[6
,7
]}

Farrah, D. ^{[8
,9
]}

Guarnieri, P. ^{[10
]}

Gonzales-Solares, E. ^{[11
]}

Jarvis, M. J. ^{[12
,13
]}

Maraston, C. ^{[10
]}

Nielsen, D. M. ^{[14
]}

Petric, A. O. ^{[15
]}

Sajina, A. ^{[16
]}

Surace, J. A. ^{[17
]}

Vaccari, M. ^{[13
,18
]}

机构：

[1] Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA

[2] Univ Manchester, Sch Phys & Astron, Jodrell Bank, Ctr Astrophys, Alan Turing Bldg,Oxford Rd, Manchester M13 9PL, Lancs, England

[3] Natl Radio Astron Observ, 1003 Lopezville Rd, Socorro, NM 87801 USA

[4] ESA, ESTEC, Keplerlaan1, NL-2201 AZ Noordwijk, Netherlands

[5] Natl Opt Astron Observ, 950 North Cherry Ave, Tucson, AZ 85719 USA

[6] Univ Lisbon, Inst Astrofis & Ciencias Espaco, OAL, PT-1349018 Lisbon, Portugal

[7] Univ Lisbon, Dept Fis, Fac Ciencias, Edificio C8, PT-1749016 Lisbon, Portugal

[8] Univ Hawaii, Dept Phys & Astron, 2505 Correa Rd, Honolulu, HI 96822 USA

[9] Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA

[10] Inst Cosmol & Gravitat, Dennis Sciama Bldg,Burnaby Rd, Portsmouth PO1 3FX, Hants, England

[11] Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

[12] Dept Phys, Astrophys, Keble Rd, Oxford OX1 3RH, England

[13] Univ Western Cape, Dept Phys & Astron, Private Bag X17, ZA-7535 Cape Town, South Africa

[14] Univ Wisconsin, Dept Astron, 475 N Charter St, Madison, WI 53706 USA

[15] CFHT Corp, 65-1238 Mamalahoa Highway, Kamuela, HI 96743 USA

[16] Tufts Univ, Dept Phys & Astron, 212 Coll Ave, Medford, MA 02155 USA

[17] CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA

[18] Ist Radioastron, INAF, Via Gobetti 101, I-40129 Bologna, Italy

来源：

ASTROPHYSICAL JOURNAL | 2018年 / 864卷 / 01期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

galaxies:; evolution; ACTIVE GALACTIC NUCLEI; STAR-FORMATION RATES; COMPACT GALAXIES; PHOTOMETRIC REDSHIFTS; SIZE EVOLUTION; RADIO; ULTRAVIOLET; KINEMATICS; TELESCOPE; PROFILES;

D O I：

10.3847/1538-4357/aad27d

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present images taken using the Gemini South Adaptive Optics Imager (GSAOI) with the Gemini Multi-conjugate Adaptive Optics System (GeMS) in three 2 arcmin(2) fields in the Spitzer Extragalactic Representative Volume Survey. These GeMS/GSAOI observations are among the first approximate to 0 ''.1 resolution data in the near-infrared spanning extragalactic fields exceeding 1'.5 in size. We use these data to estimate galaxy sizes, obtaining results similar to those from studies with the Hubble Space Telescope, though we find a higher fraction of compact star-forming galaxies at z > 2. To disentangle the star-forming galaxies from active galactic nuclei (AGNs), we use multiwavelength data from surveys in the optical and infrared, including far-infrared data from Herschel, as well as new radio continuum data from the Australia Telescope Compact Array and Very Large Array. We identify ultraluminous infrared galaxies (ULIRGs) at z similar to 1-3, which consist of a combination of pure starburst galaxies and AGN/starburst composites. The ULIRGs show signs of recent merger activity, such as highly disturbed morphologies and include a rare candidate triple-AGN. We find that AGNs tend to reside in hosts with smaller scale sizes than purely star-forming galaxies of similar infrared luminosity. Our observations demonstrate the potential for MCAO to complement the deeper galaxy surveys to be made with the James Webb Space Telescope.

引用

页数：16

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