Mass accretion rate of the galactic black hole A0620-00 in its quiescent state
Centre for Space Physics, Chalantika 43, Garia Station Rd., Kolkata, 700084, India
2 S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata, 700098, India e-mail: email@example.com
Corresponding author: S. Pal, firstname.lastname@example.org
Accepted: 14 March 2004
Our recent radio observation using the Giant Meter Radio Telescope (GMRT) of the galactic black hole transient A0620-00 at 1.280 GHz revealed a micro-flare of a few milli-Jansky. Assuming an equipartition of magnetic energy and the gravitational potential energy of accreting matter, it is possible to estimate the upper limit of the accretion rate. Assuming a black hole mass of residing at the center, we find this to be at most yr-1. This is consistent with earlier estimates of accretion rates based on optical and X-ray observations.
Key words: black hole physics / accretion, accretion disks / magnetic fields / radio continuum: general / techniques: photometric / methods: observational
© ESO, 2004