The Galactic Center stellar cluster: The central arcsecond

Details The Galactic Center stellar cluster: The central arcsecond The Galactic Center stellar cluster: The central arcsecond

2003-04-10

arxiv.org/abs/astro-ph/0304197v1

Astronomy and Astrophysics

Astrophysics

7 pages, 3 Figures; to be published in Astron. Nachr., Vol. 324, No. S1 (2003), Special Supplement "The central 300 parsecs of

Scientific paper

10.1002/asna.200385048

With 10 years of high-resolution imaging data now available on the stellar cluster in the Galactic Center, we analyze the dynamics of the stars at projected distances $\leq1.2''$ from the central black hole candidate Sagittarius A* (Sgr A*). We find evidence for radial anisotropy of the cluster of stars surrounding Sgr A*. We confirm/find accelerated motion for 6 stars, with 4 stars having passed the pericenter of their orbits during the observed time span. We calculated/constrained the orbital parameters of these stars. All orbits have moderate to high eccentricities. The center of acceleration coincides with the radio position of Sgr A*. From the orbit of the star S2, the currently most tightly constrained one, we determine the mass of Sgr A* to $3.3\pm0.7\times10^{6}$M$_{\odot}$ and its position to $2.0\pm2.4$ mas East and $2.7\pm4.5$ mas South of the nominal radio position. The data provide compelling evidence that Sgr A* is a single supermassive black hole.

Affiliated with

Also associated with

No associations

Rating

The Galactic Center stellar cluster: The central arcsecond does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Galactic Center stellar cluster: The central arcsecond, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Galactic Center stellar cluster: The central arcsecond will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-273784