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arXiv:astro-ph/0309744 (astro-ph)
[Submitted on 27 Sep 2003 (v1), last revised 1 Jul 2004 (this version, v2)]

Title:Probing the Spacetime Around Sgr A* with Radio Pulsars

Authors:Eric Pfahl, Avi Loeb (CfA)
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Abstract: The supermassive black hole at the Galactic center harbors a bound cluster of massive stars that should leave neutron-star remnants. Extrapolating from the available data, we estimate that 100-1000 radio pulsars may presently orbit Sgr A* with periods of <~100 yr. Optimistically, 1-10 of the most luminous of these pulsars may be detectable with current telescopes in periodicity searches at frequencies near 10 GHz, where the effects of interstellar scattering are alleviated. Long-term timing observations of such a pulsar would clearly reveal its Keplerian motion, and possibly show the effects of relativistic gravity. We briefly discuss how pulsar timing can be used to study the dynamical and interstellar environment of the central black hole, and speculate on the prospects for astrometric observations of an orbiting pulsar.
Comments: Accepted by ApJ; important improvements have been made; 6 pages; emulateapj
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0309744
  (or arXiv:astro-ph/0309744v2 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0309744
Journal reference: Astrophys.J.615:253-258,2004
Related DOI: https://doi.org/10.1086/423975

Submission history

From: Eric Pfahl [view email]
[v1] Sat, 27 Sep 2003 06:22:11 UTC (43 KB)
[v2] Thu, 1 Jul 2004 03:16:05 UTC (31 KB)
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