Optical Appearance of the Debris of a Star Disrupted by a Massive Black Hole

1997/03/12 by Abraham Loeb, Andrew Ulmer · 1 citation
Physics and Astronomy · #astro-ph

paper · pdf · doi:10.1086/304814

15 pages, 3 figures, submitted to ApJ

arxiv created 1997/03/12 · arxiv updated 2009/12/01

Abstract

We show that the disruption of a star by a 10⁶ solar mass black hole in a galactic nucleus could under favorable circumstances produce an optically-thick envelope that radiates with a thermal spectrum at the Eddington limit, 10⁴⁴ erg/s, for tens of years. The low apparent temperature of this envelope, 10⁴ K, would be easily detectable in optical surveys. If most galaxies harbor a massive black hole at their center, then the Sloan Digital Sky Survey might find hundreds of galaxies with nuclear activity of this type. Because the envelope is driven to shine near the Eddington limit, a measurement of the source redshift and total luminosity could yield the black hole mass.

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