The Proper Motion and Mass of SGR A*

Details The Proper Motion and Mass of SGR A* The Proper Motion and Mass of SGR A*

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aspc..186...24r&link_type=abstract

The Central Parsecs of the Galaxy, ASP Conference Series, Vol. 186. Edited by Heino Falcke, Angela Cotera, Wolfgang J. Duschl, F

Physics

4

Scientific paper

The apparent proper motion of Sgr A, relative to extragalactic sources, is consistent with that expected from the Sun orbiting the center of the Galaxy. Using the VLBA we obtain a lower limit for the peculiar motion of Sgr AB of about 20 kms, implying a lower limit for mass of Sgr B of ~103 msun. This rules out the possibility that Sgr AB is a stellar system, such as a contact binary, containing ~10 msun and radiating near its Eddington luminosity. A mass of more than sim103 msun and a luminosity lax105 lsun indicates that Sgr AB is radiating at lax0.1% of its Eddington limit. All observations are consistent with Sgr AB being a super-massive black hole. Since the lower limit for the mass of Sgr AB is only about 0.1% of the gravitational mass inferred from the stellar motions, one cannot claim from our observations alone that even a significant fraction of the dark mass must be in Sgr A. However, alternative models of dark matter distributions are severely restricted by these observations.

Affiliated with

Also associated with

No associations

Rating

The Proper Motion and Mass of SGR A* 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 Proper Motion and Mass of SGR A*, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Proper Motion and Mass of SGR A* will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1498014