High Resolution Optical and Near-Infrared Keck Spectroscopy of Dusty Starburst Galaxies at 0.4 < z < 0.9

Details High Resolution Optical and Near-Infrared Keck Spectroscopy of Dusty Starburst Galaxies at 0.4 < z < 0.9 High Resolution Optical and Near-Infrared Keck Spectroscopy of Dusty Starburst Galaxies at 0.4 < z < 0.9

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.6508c&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #65.08; Bulletin of the American Astronomical Society, Vol. 32, p.1510

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The recent detection of a strong cosmic infrared background peaking at 140 micra implies that distant galaxies are strongly affected by dust extinction. The determination of the star formation rate (SFR) history of the universe therefore requires the combination of multi-wavelength indicators of star formation. We will present the analysis of a sample of distant (z=0.4--0.9) dusty starbursts selected by their ISOCAM-15 micra mid-infrared and VLA-20 cm radio luminosities, for which we have obtained high resolution optical (ESI) and near-infrared (NIRSPEC) spectroscopy with the Keck II telescope. The SFR estimated from the dust emission in the far infrared and synchrotron radiation from supernovae in radio frequencies will be compared to the standard optical indicators of star formation that use the [O II] and Hα lines, corrected for extinction inferred from Hα /Hβ . The comparison between these different indicators allows us to constrain the relevance of extinction in the SFR determinations, which is a key issue in modern observational cosmology. N.C. acknowledges financial support from a UCM Fundación del Amo fellowship.

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