2013A&A...554L...3O -
Astronomy and Astrophysics, volume 554, L3-3 (2013/6-1)
Far-infrared-detected Lyman-break galaxies at z ∼ 3 . Dust attenuation and dust correction factors at high redshift.
OTEO I., CEPA J., BONGIOVANNI A., PEREZ-GARCIA A.M., CEDRES B., DOMINGUEZ SANCHEZ H., EDEROCLITE A., SANCHEZ-PORTAL M., PINTOS-CASTRO I. and PEREZ-MARTINEZ R.
Abstract (from CDS):
Lyman-break galaxies (LBGs) represent one of the kinds of star-forming galaxies that are found in the high-redshift universe. The detection of LBGs in the far-infrared (FIR) domain can provide very important clues on their dust attenuation and total star-formation rate (SFR), allowing a more detailed study than has been performed so far. In this work we explore the FIR emission of a sample of 16 LBGs at z∼3 in the GOODS-North and GOODS-South fields that are individually detected in PACS-100µm or PACS-160µm. These detections demonstrate the possibility of measuring the dust emission of LBGs at high redshift. We find that PACS-detected LBGs at z∼3 are highly obscured galaxies which belong to the ultra-luminous or hyper-luminous IR galaxy class. Their total SFR cannot be recovered with the dust attenuation factors obtained from their UV continuum slope or their SED-derived dust attenuation employing [Bruzual & Charlot,
2003MNRAS.344.1000B] templates. Both methods underestimate the results for most of the galaxies. Comparing with a sample of PACS-detected LBGs at z∼1, we find evidence that the FIR emission of LBGs might have changed with redshift, in the sense that the dustiest LBGs found at z∼3 have more prominent FIR emission, are dustier for a given UV slope, and have higher SFR for a given stellar mass than the dustiest LBGs found at z∼1.
Abstract Copyright:
∼
Journal keyword(s):
galaxies: evolution - galaxies: high-redshift - infrared: galaxies
Nomenclature:
Table A.1: [OCB2013] HDFN-NNNN N=7 among (Nos 923-2128).
Simbad objects:
17
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