Environment of MAMBO Galaxies in the COSMOS Field
Abstract
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.Attached Files
Published - Aravena2010p6914Astrophys_J_Lett.pdf
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Additional details
- Eprint ID
- 17333
- Resolver ID
- CaltechAUTHORS:20100128-093632293
- International Max-Planck Research School (IMPRS)
- HST-HF-01212.01A
- NASA Hubble Fellowship
- NAS 5-26555
- NASA
- Created
-
2010-01-29Created from EPrint's datestamp field
- Updated
-
2021-11-08Created from EPrint's last_modified field
- Caltech groups
- COSMOS, Infrared Processing and Analysis Center (IPAC)