GOODS-Herschel: radio-excess signature of hidden AGN activity in distant star-forming galaxies⋆

Author： Del Moro A.   Alexander D. M.   Mullaney J. R.   Daddi E.   Pannella M.   Bauer F. E.   Pope A.   Dickinson M.   Elbaz D.   Barthel P. D.   Garrett M. A.   Brandt W. N.   Charmandaris V.   Chary R. R.   Dasyra K.   Gilli R.   Hickox R. C.   Hwang H. S.   Ivison R. J.   Juneau S.   Le Floc’h E.   Luo B.   Morrison G. E.   Rovilos E.   Sargent M. T.   Xue Y. Q.  

Publisher： Edp Sciences

E-ISSN： 1432-0746|549|issue|A59-A59

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.549, Iss.issue, 2012-12, pp. : A59-A59

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Context. A tight correlation exists between far-infrared and radio emission for star-forming galaxies (SFGs), which seems to hold out to high redshifts (z ≈ 2). Any excess of radio emission over that expected from star formation processes is most likely produced by an active galactic nucleus (AGN), often hidden by large amounts of dust and gas. Identifying these radio-excess sources will allow us to study a population of AGN unbiased by obscuration and thus find some of the most obscured, Compton-thick AGN, which are in large part unidentified even in the deepest X-ray and infrared (IR) surveys.

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