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• W2043926467 endingPage "150" @default.
• W2043926467 startingPage "150" @default.
• W2043926467 abstract "The Spitzer Space Telescope has identified a population of ultra-luminous infrared galaxies (ULIRGs) at z ~ 2 that may play an important role in the evolution of massive galaxies. We measure the stellar masses of two populations of Spitzer-selected ULIRGs, both of which have extremely red R-[24] colors (dust-obscured galaxies, or DOGs) and compare our results with sub-millimeter selected galaxies (SMGs). One set of 39 DOGs has a local maximum in their mid-IR spectral energy distribution (SED) at rest-frame 1.6um associated with stellar emission (bump DOGs), while the other set of 51 DOGs has a power-law dominated mid-IR SED with spectral features typical of obscured AGN (power-law DOGs). We use stellar population synthesis models applied self-consistently to broad-band photometry in the rest-frame ultra-violet, optical, and near-infrared of each of these populations and test a variety of stellar population synthesis codes, star-formation histories (SFHs), and initial mass functions (IMFs). Assuming a simple stellar population SFH and a Chabrier IMF, we find that the median and inner quartile stellar masses of SMGs, bump DOGs and power-law DOGs are given by log(M_*/M_sun) = 10.42_-0.36^+0.42, 10.62_-0.32^+0.36, and 10.71_-0.34^+0.40, respectively. Implementing more complicated SFHs with multiple age components increases these mass estimates by up to 0.5 dex. Our stellar mass estimates are consistent with physical mechanisms for the origin of z~2 ULIRGs that result in high star-formation rates for a given stellar mass. Such mechanisms are usually driven by a major merger of two gas-rich systems, rather than smooth accretion of gas and small satellites." @default.
• W2043926467 created "2016-06-24" @default.
• W2043926467 creator A5020617367 @default.
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• W2043926467 creator A5090080680 @default.
• W2043926467 creator A5090148205 @default.
• W2043926467 date "2011-12-22" @default.
• W2043926467 modified "2023-10-15" @default.
• W2043926467 title "THE STAR FORMATION HISTORIES OF<i>z</i>∼ 2 DUST-OBSCURED GALAXIES AND SUBMILLIMETER-SELECTED GALAXIES" @default.
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