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arXiv:astro-ph/0504474 (astro-ph)
[Submitted on 21 Apr 2005]

Title:A Black Hole in the Galactic Center Complex IRS 13E?

Authors:R. Schoedel, A. Eckart, C. Iserlohe, R. Genzel, T. Ott
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Abstract: The IRS 13E complex is an unusual concentration of massive, early-type stars at a projected distance of ~0.13 pc from the Milky Way's central supermassive black hole Sagittarius A* (Sgr A*). Because of their similar proper motion and their common nature as massive, young stars it has recently been suggested that IRS 13E may be the remnant of a massive stellar cluster containing an intermediate-mass black hole (IMBH) that binds its members gravitationally in the tidal field of Sgr A*. Here, we present an analysis of the proper motions in the IRS~13E environment that combines the currently best available data with a time line of 10 years. We find that an IMBH in IRS 13E must have a minimum mass of ~10^4 solar masses in order to bind the source complex gravitationally. This high mass limit in combination with the absence so far of compelling evidence for a non-thermal radio and X-ray source in IRS 13E make it appear unlikely that an IMBH exists in IRS 13E that is sufficiently massive to bind the system gravitationally.
Comments: accepted by APJ
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0504474
  (or arXiv:astro-ph/0504474v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0504474
Journal reference: Astrophys.J. 625 (2005) L111-L114
Related DOI: https://doi.org/10.1086/431307

Submission history

From: Rainer Schödel [view email]
[v1] Thu, 21 Apr 2005 16:23:22 UTC (78 KB)
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