Physical Sciences and Mathematics Commons^™

Spectroscopic Confirmation Of An Extreme Starburst At Redshift 4.547, P Capak, Cl Carilli, N Lee, T Aldcroft, H Aussel, E Schinnerer, Gw Wilson, Min Yun, A Blain, M Giavalisco, O Ilbert, J Kartaltepe, Ks Lee, H Mccracken, B Mobasher, M Salvato, S Sasaki, Ks Scott, K Sheth, Y Shioya, D Thompson, M Elvis, Db Sanders, Nz Scoville, Y Tanaguchi

Astronomy Department Faculty Publication Series

We report the spectroscopic confirmation of a submillimeter galaxy (SMG) at z = 4.547 with an estimated L_IR = (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 …