The rate of stellar tidal disruption flares from SDSS data
arXiv:1210.1246 · doi:10.1051/epjconf/20123908002
Abstract
We report an observational estimate of the rate of stellar tidal disruption flares (TDFs), based on our (successful) search for these events in archival Sloan Digital Sky Survey (SDSS) multi-epoch imaging data. Our pipeline took advantage of the excellent astrometry of SDSS to separate nuclear flares from supernovae. The 10 year baseline and the high cadence of the observations facilitate a clear-cut identification of variable active galactic nuclei. We found 186 nuclear flares, of which two are excellent TDF candidates. To compute the rate of (optical) stellar tidal disruption events, we simulate our entire pipeline to obtain the efficiency of detection for a given light curve. Using a simple model to extrapolate the observed light curves forward and backward in time, we find our best-estimate of the TDF rate: 3x10-5 per galaxy per year. In addition, we give a model-independent upper limit to the TDF rate: < 3x10-4 per galaxy per year (90% CL).
Proceeding of the Tidal Disruption events and AGN outbursts workshop, 25-27 June 2012, ESAC, Madrid, Spain. To appear in EPJ web of conferences, Editor: R. D. Saxton
References in corpus (8)
- On the Black Hole Mass - Bulge Mass Relation
- Rates of tidal disruption of stars by massive central black holes
- Revised Rates of Stellar Disruption in Galactic Nuclei
- Optical discovery of probable stellar tidal disruption flares
- Multiband lightcurves of tidal disruption events
- Large-Amplitude X-ray Outbursts from Galactic Nuclei: A Systematic Survey Using ROSAT Archival Data
- A Galaxy Photometric Redshift Catalog for the Sloan Digital Sky Survey Data Release 6
- On the inconsistency between the black hole mass function inferred from M_bh-sigma and M_bh-L correlation