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The dust content and radiation fields of sample of galaxies in the ELAIS-N1 field

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dc.contributor.author Shalima, P
dc.contributor.author Gogoi, R
dc.contributor.author Pathak, A
dc.contributor.author Misra, R
dc.contributor.author Gupta, R
dc.contributor.author Vaidya, D. B
dc.date.accessioned 2020-11-20T13:35:24Z
dc.date.available 2020-11-20T13:35:24Z
dc.date.issued 2015-08
dc.identifier.citation Publications of the Astronomical Society of the Pacific, Vol. 127, No. 954, pp. 726-731 en_US
dc.identifier.issn 0004-6280
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7346
dc.description Restricted Access © The Astronomical Society of the Pacific http://dx.doi.org/10.1086/682368 en_US
dc.description.abstract The Mid-IR colors (F8/F24) of galaxies together with their IR-UV luminosity correlations can be used to get some insight into the relative abundance of the different dust grain populations present in them. The ELAIS-N1 field contains thousands of galaxies which do not have optical spectra but have been observed in the Mid-IR by Spitzer and UV by GALEX, making it ideal for these studies. As part of this work we have selected a sample of galaxies from the ELAIS-N1 field which have photometric observations in the MIR and UV as well as photometric redshifts from the SDSS database. We follow the constraint that the redshifts are ≤ 0.1, thereby giving us a total of 309 galaxies. We find that the majority of the galaxies in the sample are PAH dominated due to their high MIR flux ratio. We also find a reasonable correlation between the Mid-IR and the UV luminosities out of which the Mid-IR emission from PAHs at 8 μm is marginally better correlated than the 24 μm VSG emission with the UV luminosities. However, if we divide the sample based on their F8/F24 ratios, which is also an indicator of metallicity, the MIR-UV correlation seems to increase with the F8/F24 ratio. But the MIR-UV correlations are not very different for the PAHs and the VSG population within the individual metallicity groups. en_US
dc.language.iso en en_US
dc.publisher The University of Chicago Press on behalf of the Astronomical Society of the Pacific en_US
dc.subject Astrophysics en_US
dc.subject Astrophysics of Galaxies en_US
dc.title The dust content and radiation fields of sample of galaxies in the ELAIS-N1 field en_US
dc.type Article en_US

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