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http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2043| Quest for cosmos submillimeter galaxy counterparts using carma and VLA: identifying three high-redshift starburst galaxies | |
| Itziar Aretxaga David Hughes | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Galaxies: fundamental parameters Galaxies: active, evolution Cosmology: observations Radio continuum: galaxies | |
| We report on interferometric observations at 1.3 mm at 2”−3” resolution using the Combined Array for Research in Millimeter-wave Astronomy (CARMA). We identify multi-wavelength counterparts of three submillimeter galaxies (SMGs; F1mm> 5.5 mJy) in the COSMOS field, initially detected with MAMBO and AzTEC bolometers at low, ~ 10” − 30”, resolution. All three sources – AzTEC/C1, Cosbo-3 and Cosbo-8 – are identified to coincide with positions of 20 cm radio sources. Cosbo-3, however, is not associated with the most likely radio counterpart, closest to the MAMBO source position, but that further away from it. This illustrates the need for intermediate-resolution (~ 2”) mm-observations to identify the correct counterparts of single-dish detected SMGs. All of our three sources become prominent only at NIR wavelengths, and their mm-to-radio flux based redshifts suggest that they lie at redshifts z ≳ 2. As a proof of concept, we show that photometric redshifts can be well determined for SMGs, and we find photometric-redshifts of 5.6±1.2, 1.9+0.9−0.5, and ~ 4 for AzTEC/C1, Cosbo-3, and Cosbo-8, respectively. Using these we infer that these galaxies have radio-based star formation rates of ≳ 1000 M⊙yr ⁻¹, and IR luminosities of ~10¹³ L⊙ consistent with properties of high-redshift SMGs. In summary, our sources reflect a variety of SMG properties in terms of redshift and clustering, consistent with the framework that SMGs are progenitors of z ~ 2 and today’s passive galaxies. | |
| The Astrophysical Journal Supplement Series | |
| 2012 | |
| Artículo | |
| Inglés | |
| Estudiantes Investigadores Público en general | |
| Smolcic, V., et al., (2012), Quest for cosmos submillimeter galaxy counterparts using carma and VLA identifying three high-redshift starburst galaxies, The Astrophysical Journal Supplement Series, Vol. 200(1):1-13 | |
| ASTRONOMÍA Y ASTROFÍSICA | |
| Versión aceptada | |
| acceptedVersion - Versión aceptada | |
| Aparece en las colecciones: | Artículos de Astrofísica |
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| 40 Aretxaga_2012_ApJS200.pdf | 1.95 MB | Adobe PDF | Visualizar/Abrir |