Detection of pulsar beams deflected by the black hole in Sgr A*: effects of black hole spin

Abstract

Some Galactic models predict a significant population of radio pulsars close to the our galactic center. Beams from these pulsars could get strongly deflected by the supermassive black hole (SMBH) believed to reside at the galactic center and reach the Earth. Earlier work assuming a Schwarzschild SMBH gave marginal chances of observing this exotic phenomenon with current telescopes and good chances with future telescopes. Here we calculate the odds of observability for a rotating SMBH. We find that the estimates of observation are not affected by the SMBH spin, but a pulsar timing analysis of deflected pulses might be able to provide an estimate of the spin of the central black hole.

15 pages aastex, 8 Figs

References in corpus (4)

• Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre
• Starbursts near supermassive black holes: young stars in the Galactic Center, and gravitational waves in LISA band
• Evidence for a Long-Standing Top-Heavy IMF in the Central Parsec of the Galaxy
• Observability of pulsar beam bending by the Sgr~A* black hole

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