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

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

1997-03-12

arxiv.org/abs/astro-ph/9703079v1

Astronomy and Astrophysics

Astrophysics

15 pages, 3 figures, submitted to ApJ

Scientific paper

10.1086/304814

We show that the disruption of a star by a 10^6 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, 10^{44} erg/s, for tens of years. The low apparent temperature of this envelope, 10^4 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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