Measuring the Mass and Spin of a Stellar Black Hole

Details Measuring the Mass and Spin of a Stellar Black Hole Measuring the Mass and Spin of a Stellar Black Hole

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30616m&link_type=abstract

Spitzer Proposal ID #30616

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Scientific paper

We propose to obtain reliable and precise mass measurements for two black holes, A0620-00 and X-ray Nova Mus 1991, and to estimate the spin of the latter. In order to succeed, we must explore the properties of the cold accretion disks that surround these quiescent black holes. Although the study of these cold disks is a secondary objective, it is one of fundamental importance that may have decisive impacts on other areas of astrophysical research. With IRAC we propose to obtain complete orbital light curves of both binary black holes in all four passbands at high time resolution. Our modeling of these light curves will allow us to separate the disk and stellar components of light and thereby measure black hole mass and spin and also secure the first direct measurements of these inviscid black-hole disks. Spitzer observations are crucially important because no other space or ground-based observatory can make direct observations of these cold accretion disks.

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