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SUMMARY:The GOODS-Herschel view on Main Sequence galaxies\, compact starbu
 rsts and buried AGNs - David Elbaz\, CEA Saclay\, Service d'Astrophysique
DTSTART:20110428T153000Z
DTEND:20110428T163000Z
UID:TALK27864@talks.cam.ac.uk
CONTACT:scott chapman
DESCRIPTION:Evidence has been recently gathered suggesting that galaxies i
 n their main star formation episodes follow some scaling laws\, somewhat s
 imilar to the fundamental plane for early-types. This suggests that behind
  the complexity of galaxy and star formation\, exist some dominant physica
 l processes conducting galaxy evolution\, which appear as mostly internal 
 to galaxies. Investigating these processes is a difficult task requiring u
 nbiased galaxy samples with accurate star formation rates\, stellar masses
 \,...\nIn this perspective\, we will review the latest results obtained wi
 th the deepest far-infrared imaging of the Universe in the GOODS fields wi
 th the Herschel observatory - GOODS-Herschel. We will show that at all epo
 chs the bulk of star forming galaxies appear to follow a Main Sequence (MS
 )\, valid for galaxies of all star formation rates and luminosities\, whil
 e a fifth of them form stars in a starburst mode (SB). Previous claims for
  mid-infrared excess galaxies\, obscured AGNs and strong evolution of the 
 IR spectral energy distribution of galaxies will be discussed in this fram
 ework. Using radio and UV imaging\, we will show that starbursts have larg
 e projected surface densities of star formation while MS\, including most 
 distant ULIRGs\, present extended star formation like local normal star fo
 rming galaxies. A universal infrared spectral energy distribution will be 
 presented for MS star forming galaxies as well as starbursts. Finally\, we
  will show how these considerations can be used to search for previously u
 nidentified obscured active nuclei.
LOCATION:Sackler Lecture Theatre\, IoA (tea at 4:00 pm)
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