Detection of an ultra-bright submillimeter galaxy behind the Small Magellanic Cloud
Abstract
We report the discovery of a new ultra-bright submillimeter galaxy (SMG) behind the Small Magellanic Cloud (SMC). This SMG is detected as a 43.3+-8.4 mJy point source (MM J01071-7302, hereafter MMJ0107) in the 1.1 mm continuum survey of the SMC by AzTEC on the ASTE telescope. MMJ0107 is also detected in the radio (843 MHz), Herschel/SPIRE, Spitzer MIPS 24 {\mu}m, all IRAC bands, Wide-field Infrared Survey Explorer, and near-infrared (J, H, KS). We find an optical (U, B, V) source, which might be the lensing object, at a distance of 1.4 arcsec from near-infrared and IRAC sources. Photometric redshift estimates for the SMG using representative spectral energy distribution templates show the redshifts of 1.4-3.9. We estimate total far-infrared luminosity of (0.3-2.2)x10^14 {\mu}^-1 L_sun and a star formation rate of 5600-39, 000 {\mu}^-1 M_sun yr^-1, where {\mu} is the gravitational magnification factor. This apparent extreme star formation activity is likely explained by a highly magnified gravitational lens system.
Keywords
Cite
@article{arxiv.1308.6375,
title = {Detection of an ultra-bright submillimeter galaxy behind the Small Magellanic Cloud},
author = {Tatsuya Takekoshi and Yoichi Tamura and Tetsuhiro Minamidani and Kotaro Kohno and Taira Oogi and Kazuo Sorai and Asao Habe and Hajime Ezawa and Tai Oshima and Kimberly S. Scott and Jason E. Austermann and Shinya Komugi and Tomoka Tosaki and Norikazu Mizuno and Erik Muller and Akiko Kawamura and Toshikazu Onishi and Yasuo Fukui and Hiroshi Matsuo and Itziar Aretxaga and David H. Hughes and Ryohei Kawabe and Grant W. Wilson and Min S. Yun},
journal= {arXiv preprint arXiv:1308.6375},
year = {2013}
}
Comments
14 pages, 2 figures, published in ApJ Letters