Aravena, M. and Bertoldi, F. and Carilli, C. and Schinnerer, E. and McCracken, H. J. and Salvato, M. and Riechers, D. and Sheth, K. and Smolcić, V. and Capak, P. and Koekemoer, A. M. and Menten, K. M. (2010) Environment of MAMBO Galaxies in the COSMOS Field. Astrophysical Journal Letters, 708 (1). L36-L41. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20100128-093632293
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Submillimeter galaxies (SMGs) represent a dust-obscured high-redshift population undergoing massive star formation activity. Their properties and space density have suggested that they may evolve into spheroidal galaxies residing in galaxy clusters. In this Letter, we report the discovery of compact (~10"-20") galaxy overdensities centered at the position of three SMGs detected with the Max-Planck millimeter bolometer camera in the COSMOS field. These associations are statistically significant. The photometric redshifts of galaxies in these structures are consistent with their associated SMGs; all of them are between z = 1.4 and 2.5, implying projected physical sizes of ~170 kpc for the overdensities. Our results suggest that about 30% of the radio-identified bright SMGs in that redshift range form in galaxy density peaks in the crucial epoch when most stars formed.
|Additional Information:||© 2010 The American Astronomical Society. Received 2009 July 27; accepted 2009 November 20; published 2009 December 16. M. Aravena was partly supported for this research through a stipend from the International Max-Planck Research School (IMPRS) for Radio and Infrared Astronomy at the Universities of Bonn and Cologne. D. Riechers acknowledges support from NASA through Hubble Fellowship grant HST-HF-01212.01A awarded by the STScI, operated by AURA, under contract NAS 5-26555.|
|Subject Keywords:||galaxies: clusters: general; galaxies: evolution; galaxies: high-redshift; galaxies: starburst|
|Official Citation:||Environment of MAMBO Galaxies in the COSMOS Field M. Aravena, F. Bertoldi, C. Carilli, E. Schinnerer, H. J. McCracken, M. Salvato, D. Riechers, K. Sheth, V. Sm&ocheck;lcić, P. Capak, A. M. Koekemoer, and K. M. Menten 2010 ApJ 708 L36-L41 doi: 10.1088/2041-8205/708/1/|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||29 Jan 2010 16:52|
|Last Modified:||26 Dec 2012 11:44|
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