Mathematics – Logic
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sptz.prop80153p&link_type=abstract
Spitzer Proposal ID #80153
Mathematics
Logic
Scientific paper
Our understanding of interstellar dust properties in a cosmic context is currently being revolutionized. While traditional methods for measuring the most observationally fundamental important dust diagnostic (the extinction curve) have remained restricted to the Galaxy and Magellanic clouds for decades, a variety of new techniques has catapulted the detailed study of dust extinction from our local neighborhood out to the highest redshifts. Gamma-ray burst afterglows, perhaps the most capable of all such cosmological dust probes, have in the past five years provided many detailed extinction measurements of a large and growing sample of galaxies up to redshift z ~ 5. We propose to use the Spitzer Space Telescope to observe a statistically meaningful sample (17 objects) of these galaxies at 3.6 and 4.5 microns, to try to correlate the properties of the extinction law (such as the presence or absence of 2175-Angstrom absorption) with the properties of the host galaxy itself - in particular, the stellar mass, which is tightly coupled to dust production and is key to a host of other essential properties such as metallicity and specific star-formation rate.
Bloom Joshua
Cenko Bradley S.
Greiner Jochen
Kruehler Thomas
Levan Andrew
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