Please use this identifier to cite or link to this item: http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1507
Herschel-ATLAS: the far-infrared–radio correlation at z < 0.5🟉
David Hughes
Acceso Abierto
Atribución-NoComercial-SinDerivadas
Galaxies: evolution
Infrared: galaxies
Radio continuum: galaxies.
We use data from the Herschel-ATLAS to investigate the evolution of the far-infrared–radio correlation over the redshift range 0 < z < 0.5. Using the total far-infrared luminosity of all >5σ sources in the Herschel-ATLAS Science Demonstration Field and cross-matching these data with radio data from the Faint Images of the Radio Sky at Twenty-Centimetres (FIRST) survey and the NRAO Very Large Array (VLA) Northern Sky Survey (NVSS), we obtain 104 radio counterparts to the Herschel sources.With these data we find no evidence for evolution in the far-infrared–radio correlation over the redshift range 0 < z < 0.5, where the median value for the ratio between far-infrared and radio luminosity, q🇮🇷, over this range is q🇮🇷 =2.40±0.12 (and a mean of q🇮🇷 = 2.52 ± 0.03 accounting for the lower limits), consistent with both the local value determined from IRAS and values derived from surveys targeting the high-redshift Universe. By comparing the radio fluxes of our sample measured from both FIRST and NVSS we show that previous results suggesting an increase in the value of q🇮🇷 from high to low redshift may be the result of resolving out extended emission of the low-redshift sources with relatively high-resolution interferometric data, although contamination from active galactic nuclei could still play a significant role. We also find tentative evidence that the longer wavelength cooler dust is heated by an evolved stellar population which does not trace the star formation rate as closely as the shorter wavelength ≲250 μmemission or the radio emission, supporting suggestions based on detailed models of individual galaxies.
Monthly Notices of the Royal Astronomical Society
2010
Artículo
Inglés
Estudiantes
Investigadores
Público en general
Jarvis, Matt J., et al., (2010), Herschel-ATLAS: the far-infrared–radio correlation at z < 0.5🟉, Monthly Notices of the Royal Astronomical Society, Vol. 409(1):92–101
ASTRONOMÍA Y ASTROFÍSICA
Versión aceptada
acceptedVersion - Versión aceptada
Appears in Collections:Artículos de Astrofísica

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