Journal or Book Title
ASTROPHYSICAL JOURNAL LETTERS
We report the spectroscopic confirmation of a submillimeter galaxy (SMG) at z = 4.547 with an estimated LIR = (0.5-2.0) × 1013 L. The spectra, mid-IR, and X-ray properties indicate the bolometric luminosity is dominated by star formation at a rate of >1000 M yr−1. Multiple, spatially separated components are visible in the Lyα line with an observed velocity difference of up to 380 km s−1 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 >1010 M of stellar mass. This object is a likely progenitor for the massive early-type systems seen at z ~ 2.
Capak, P; Carilli, CL; Lee, N; Aldcroft, T; Aussel, H; Schinnerer, E; Wilson, GW; Yun, Min; Blain, A; Giavalisco, M; Ilbert, O; Kartaltepe, J; Lee, KS; McCracken, H; Mobasher, B; Salvato, M; Sasaki, S; Scott, KS; Sheth, K; Shioya, Y; Thompson, D; Elvis, M; Sanders, DB; Scoville, NZ; and Tanaguchi, Y, "Spectroscopic confirmation of an extreme starburst at redshift 4.547" (2008). ASTROPHYSICAL JOURNAL LETTERS. 173.