Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.3504r&link_type=abstract
American Astronomical Society, 199th AAS Meeting, #35.04; Bulletin of the American Astronomical Society, Vol. 33, p.1359
Astronomy and Astrophysics
Astronomy
Scientific paper
We use moderately-high resolution spectroscopy from ESI on Keck II to probe the properties of the cool, absorbing gas in massive outflows in a sample of ultraluminous infrared galaxies (ULIGs) at z < 0.3. Measured mass outflow rates are comparable to the corresponding global star formation rates (SFRs) inferred from infrared luminosities, a result also obtained in less massive galaxies. This implies that the mass outflow rates of star-forming galaxies, normalized to the corresponding global star formation rates, are fairly constant over a large range of SFR. Using kinematics inferred from line widths, we also measure a high escape fraction for the gas ( ~ 0.5). If these results apply at z > 0.3, ULIGs may supply a significant fraction of the gas being expelled by star-forming galaxies into the intergalactic medium at higher z. SV and DSR acknowledge support from a Cottrell Scholarship awarded by the Research Corporation, a NASA/LTSA grant, and an NSF/CAREER grant.
Rupke David S.
Sanders David B.
Veilleux Sylvain
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