Spectroscopy of Luminous Infrared Galaxies at 2 Microns. III. Analysis for Galaxies with log ( L IR / L ☉ ) ≳ 11.2

Abstract

We have obtained spectra across the K window for the first large sample of luminous galaxies selected from the IRAS survey. This paper contains the principal analysis of the 43 systems in our sample with luminosities of 11.2 ~ 12 from Goldader et al. (Paper I), the number of systems observed in this program totals 56. We have incorporated these ultraluminous galaxies in some parts of the analysis to examine properties across the entire luminosity range of our sample.