Flares from Disruptions of White Dwarfs by Intermediate Mass Black Holes

Details Flares from Disruptions of White Dwarfs by Intermediate Mass Black Holes Flares from Disruptions of White Dwarfs by Intermediate Mass Black Holes

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21810701s&link_type=abstract

American Astronomical Society, AAS Meeting #218, #107.01; Bulletin of the American Astronomical Society, Vol. 43, 2011

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Scientific paper

Tidal disruptions of white dwarfs (WDs) by intermediate mass black holes (IMBHs) may produce detectable electromagnetic/gravitational wave signature. They may provide the evidence for existence of IMBHs. We simulate the disruptions in full numerical general relativity (GR) with MayaKranc + Whisky code combination for several BH spin values. We model X-ray and UV time-dependent spectra from the simulations. Direct emission from hot fallback material is substantial, when the BH spin is aligned with WD orbital angular momentum. However, the fallback material can be completely shielded by large Compton optical depth in a misaligned case. This emphasizes the importance of realistic GR simulations with misaligned spin. Properties of flares from shock breakout region depend less on spin orientation and value. We discuss the prospects of positive identifications of candidates from GALEX and other surveys.

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