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Title: Detection of pulsar beams deflected by the black hole in SGR A*: Effects of black hole spin

Some Galactic models predict a significant population of radio pulsars close to the Galactic center. Beams from these pulsars could be strongly deflected by the supermassive black hole (SMBH) believed to reside at the Galactic center and as a result reach 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 study whether those estimates are significantly affected by SMBH spin. We find that spin effects make a negligible difference in detectability, but the pattern of pulse arrival times is clearly affected. In particular, if strongly deflected beams are detected, the SMBH spin signature could be extracted from pulsar beam times of arrival.
Authors:
 [1] ; ; ;  [2]
  1. Department of Physics and Astronomy and Center for Gravitational Wave Astronomy, University of Texas at Brownsville, Brownsville, TX 78520 (United States)
  2. Department of Physics and Astronomy, Center for Gravitational Wave Astronomy and Center for Advanced Radio Astronomy, University of Texas at Brownsville, Brownsville, TX 78520 (United States)
Publication Date:
OSTI Identifier:
22341937
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 778; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BEAMS; BLACK HOLES; COMPUTERIZED SIMULATION; DETECTION; GALAXY NUCLEI; PULSARS; RADIO TELESCOPES; SCHWARZSCHILD METRIC; SPIN