Abstract
view Abstract Citations (16) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS No X-Ray--luminous Starbursts in the Einstein Medium Sensitivity Survey, Either Halpern, Jules P. ; Helfand, David J. ; Moran, Edward C. Abstract We continue to investigate recurrent claims that a substantial number of "normal" star-forming galaxies may have X-ray luminosities in the range 1042-44 ergs s-1. In this installment, we present new spectra of four such emission-line galaxies that were ambiguously classified in the Einstein Extended Medium Sensitivity Survey (EM SS), and find that they all have intermediate-type Seyfert nuclei as evidenced by broad components of their Hα lines. We argue that any of the remaining emission-line galaxies in the EMSS with 1042 < Lχ < 1044 ergs s-1 that were flagged as needing further spectroscopic work are almost certain to have active nuclei as well. We conclude that in these as well as other samples of X-ray-selected emission-line galaxies, X-ray luminosities in excess of 1042 ergs s 1 can and should be attributed to an active nucleus, even in the case that most of the infrared continuum or optical emission-line luminosity is caused by star formation. There is as yet no good evidence for X-ray-luminous starbursts. Publication: The Astrophysical Journal Pub Date: November 1995 DOI: 10.1086/176424 Bibcode: 1995ApJ...453..611H Keywords: GALAXIES: SEYFERT; GALAXIES: STARBURST; X-RAYS: GALAXIES; GALAXIES: ACTIVE full text sources ADS | data products SIMBAD (11) NED (4)
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