The Nature of GRB-selected Submillimeter Galaxies: Hot and Young

Michal Michalowski, J. Hjorth, J. M. Castro Cerón, D. Watson

Research output: Contribution to journalArticlepeer-review

Abstract

We present detailed fits of the spectral energy distributions (SEDs) of four submillimeter galaxies selected by the presence of a gamma-ray burst (GRB) event (GRBs 980703, 000210, 000418, and 010222). These faint ~3 mJy submillimeter emitters at redshift ~1 are characterized by an unusual combination of long- and short-wavelength properties, namely enhanced submillimeter and/or radio emission combined with optical faintness and blue colors. We exclude an active galactic nucleus as the source of long-wavelength emission. From the SED fits, we conclude that the four galaxies are young (ages ~45 K) indicate that GRB host galaxies are hotter, younger, and less massive counterparts to the submillimeter-selected galaxies detected so far. Future facilities like Herschel, the James Clerk Maxwell Telescope SCUBA-2, and ALMA will test this hypothesis, enabling measurement of dust temperatures of fainter GRB-selected galaxies.
Original languageEnglish
Pages (from-to)817-824
JournalAstrophysical Journal
Volume672
DOIs
Publication statusPublished - 1 Jan 2008

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