Black Hole Event Horizons and Advection-Dominated Accretion

Details Black Hole Event Horizons and Advection-Dominated Accretion Black Hole Event Horizons and Advection-Dominated Accretion

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..106m&link_type=abstract

Chandra Proposal ID #01400607

Computer Science

Chandra Proposal Id #01400607

Scientific paper

We propose to establish the existence of black-hole event horizons by comparing accreting black holes to accreting neutron stars. Such a comparison is feasible because black holes and neutron stars are both present in similar environments in X-ray novae. Recently, a very successful model (ADAF model) has been applied to X-ray novae. It predicts that variations in luminosity between the quiescent state and the outburst state for X-ray novae that contain black holes are expected to be > 100 times larger than for X-ray novae that contain neutron stars. Preliminary results from ROSAT and ASCA support this prediction, as expected if black holes have event horizons and neutron stars do not. The proposed observations with AXAF can firmly establish whether black holes have event horizons.

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