Spectroscopic Confirmation Of An Extreme Starburst At Redshift 4.547
Preprint
- 4 June 2008
Abstract
We report the spectroscopic confirmation of a sub-mm galaxy (SMG) at z=4.547 with an estimated L_IR=0.5-2.0x10^13 L_sun. The spectra, mid-IR, and X-ray properties indicate the bolometric luminosity is dominated by star formation at a rate of >1000M_sun per yr. Multiple, spatially separated components are visible in the Ly-Alpha line with an observed velocity difference of up to 380 km/sec and the object morphology indicates a merger. The best fit spectral energy distribution and spectral line indicators suggest the object is 2-8 Myr old and contains >10^10 M_sun of stellar mass. This object is a likely progenitor for the massive early type systems seen at z~2.Keywords
All Related Versions
- Version 1, 2008-06-04, ArXiv
- Published version: The Astrophysical Journal, 681 (2), L53.
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