Details

Autor(en) / Beteiligte

• MAGDIS, GEORGIOS E
• Daddi, E
• BETHERMIN, M
• Sargent, M
• Elbaz, D
• Pannella, M
• Dickinson, M
• Dannerbauer, H
• da Cunha, E
• Walter, F
• Rigopoulou, D
• Charmandaris, V
• Hwang, H S
• KARTALTEPE, J

Titel

THE EVOLVING INTERSTELLAR MEDIUM OF STAR-FORMING GALAXIES SINCE z = 2 AS PROBED BY THEIR INFRARED SPECTRAL ENERGY DISTRIBUTIONS

Ist Teil von

• The Astrophysical journal, 2012-11, Vol.760 (1), p.1-23

Ort / Verlag

United States: American Astronomical Society

Erscheinungsjahr

2012

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Using data from the mid-infrared to millimeter wavelengths for individual galaxies and for stacked ensembles at 0.5 < z < 2, we derive robust estimates of dust masses (M sub(dust)) for main-sequence (MS) galaxies, which obey a tight correlation between star formation rate (SFR) and stellar mass (M sub(*)), and for starbursting galaxies that fall outside that relation. Exploiting the correlation of gas-to-dust mass with metallicity (M sub(gas)/M sub(dust)-Z), we use our measurements to constrain the gas content, CO-to-H sub(2) conversion factors ( alpha co), and star formation efficiencies (SFE) of these distant galaxies. For galaxies within the MS, we show that the variations of specific star formation rates (sSFRs = SFR/M sub(*)) are driven by varying gas fractions. These results motivate the construction of a universal set of SED templates for MS galaxies that are independent of their sSFR or M sub(*) but vary as a function of redshift with only one parameter, [left angle bracket]U[right angle bracket].