The Search for Tidal Disruptions by IMBHs in Extragalactic Globular Clusters

Details The Search for Tidal Disruptions by IMBHs in Extragalactic Globular Clusters The Search for Tidal Disruptions by IMBHs in Extragalactic Globular Clusters

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21540410i&link_type=abstract

American Astronomical Society, AAS Meeting #215, #404.10; Bulletin of the American Astronomical Society, Vol. 42, p.226

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If intermediate-mass black holes (IMBHs) exist within globular clusters, they should occasionally tidally disrupt a passing star. The debris from the disrupted star would form an accretion disk around the black hole leading to strong X-ray emission. Some of the stellar debris is also expected to form a diffuse 10000 K photosphere around the black hole that can intercept X-rays from the accretion disk and reprocess them into optical nebular emission lines. We have identified a candidate tidal disruption event in a globular cluster around the elliptical galaxy NGC1399 that harbors both a >1e39 ergs/s X-ray source and strong [NII] and [OIII] emission lines. Here we present Magellan Mage 4000-9000 Angstrom spectra of a sample of 12 other extragalactic globular clusters that harbor >1e39 ergs/s X-ray sources in a search for additional tidal disruption event candidates.

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