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Submillimeter Galaxies as Tracers of Mass Assembly at Large M.
- Source :
- Multiwavelength Mapping of Galaxy Formation & Evolution; 2005, p112-118, 7p
- Publication Year :
- 2005
-
Abstract
- Deep imaging in the rest-frame UV has constrained both the evolution of the cosmic star formation rate density [1] and its time integral, the growth of the cosmic stellar mass density [2]. Short-wavelength studies give an incomplete picture, however, since an important population of high-redshift galaxies is heavily dust-obscured. The strength of the extragalactic mid- and far-IR/submillimeter background indicates that about half of the cosmic energy density comes from dusty luminous and ultra-luminous infrared galaxies (LIRGs/ULIRGs: LIR ~ 1011.5 to 1013.5L⊙) at z ≥ 1 [3,4]. Because the brightest of these submillimeter galaxies (SMGs; see [5] and references therein) tend to lack strong X-ray emission [6], their large IR luminosities probably correspond to high star formation rates [7]. As the strikingly different appearances of the Hubble Deep Field at 0.83 μm [8] and 850 μm [9] exemplify, SMGs are rarer and forming stars much more intensely than typical optically selected systems [8,9]. Here we discuss new observations that shed light on the importance of SMGs in the history of galaxy mass assembly (all numbers assuming a flat ΩΛ = 0.7 cosmology with H0 = 70 km s-1 Mpc-1). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISBNs :
- 9783540256656
- Database :
- Supplemental Index
- Journal :
- Multiwavelength Mapping of Galaxy Formation & Evolution
- Publication Type :
- Book
- Accession number :
- 32938825
- Full Text :
- https://doi.org/10.1007/10995020_17