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2013MNRAS.434.2426F - Mon. Not. R. Astron. Soc., 434, 2426-2437 (2013/September-3)
The roles of star formation and AGN activity of IRS sources in the HerMES fields.
FELTRE A., HATZIMINAOGLOU E., HERNAN-CABALLERO A., FRITZ J., FRANCESCHINI A., BOCK J., COORAY A., FARRAH D., GONZALEZ SOLARES E.A., IBAR E., ISAAK K.G., FARO B.L., MARCHETTI L., OLIVER S.J., PAGE M.J., RIGOPOULOU D., ROSEBOOM I.G., SYMEONIDIS M. and VACCARI M.
Abstract (from CDS):
We find a correlation between the obscured star formation rate, SFRIR, derived from the IR luminosity of the starburst component, and SFRPAH, derived from the luminosity of the PAH features, LPAH, with SFRFIR taking higher values than SFRPAH. The correlation is different for AGN- and starburst-dominated objects. The ratio of LPAH to that of the starburst component, LPAH/LSB, is almost constant for AGN-dominated objects but decreases with increasing LSB for starburst-dominated objects. SFRFIR increases with the accretion luminosity, Lacc, with the increase less prominent for the very brightest, unobscured AGN-dominated sources.
We find no correlation between the masses of the hot (AGN-heated) and cold (starburst-heated) dust components. We interpret this as a non-constant fraction of gas driven by the gravitational effects to the AGN while the starburst is ongoing. We also find no evidence of the AGN affecting the temperature of the cold dust component, though this conclusion is mostly based on objects with a non-dominant AGN component. We conclude that our findings do not provide evidence that the presence of AGN affects the star formation process in the host galaxy, but rather that the two phenomena occur simultaneously over a wide range of luminosities.
Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)
Journal keyword(s): galaxies: active - galaxies: starburst - galaxies: star formation - infrared: galaxies
Simbad objects: 10
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