Detection of an ultra-bright submillimeter galaxy behind the small magellanic cloud*
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 detect...
| Autores: | , |
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| Formato: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2013 |
| País: | México |
| Recursos: | Instituto Nacional de Astrofísica, Óptica y Electrónica |
| Repositorio: | Repositorio Institucional del INAOE |
| Idioma: | inglés |
| OAI Identifier: | oai:inaoe.repositorioinstitucional.mx:1009/2269 |
| Acesso em linha: | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2269 |
| Access Level: | acceso abierto |
| Palavra-chave: | info:eu-repo/classification/Inspec/Galaxies: formation info:eu-repo/classification/Inspec/Galaxies: high-redshift info:eu-repo/classification/Inspec/Galaxies: starburst info:eu-repo/classification/Inspec/Infrared: galaxies info:eu-repo/classification/Inspec/Magellanic Clouds info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/21 |
| Resumo: | 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 24μm, 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 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) × 10¹⁴ μ⁻¹ L๏ and a star formation rate of 5600–39,000 μ⁻¹ M๏ yr⁻¹, where μ is the gravitational magnification factor. This apparent extreme star formation activity is likely explained by a highly magnified gravitational lens system. |
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