The Nuclear star cluster of the Milky Way

Show simple item record Schodel, Rainer Merritt, David Eckart, Andreas 2009-02-23T18:39:45Z 2009-02-23T18:39:45Z 2008-10
dc.identifier.citation Conference Series 131 (2008) 9 pgs en_US
dc.description Also archived in arXiv:0810.0204 v1 Oct 1, 2008. Proceedings from The Universe Under the Microscope - Astrophysics at High Angular Resolution", held 21-25 April 2008, in Bad Honnef, Germany en_US
dc.description.abstract The nuclear star cluster of the Milky Way is a unique target in the Universe. Contrary to extragalactic nuclear star clusters, using current technology it can be resolved into tens of thousands of individual stars. This allows us to study in detail its spatial and velocity structure as well as the different stellar populations that make up the cluster. Moreover, the Milky Way is one of the very few cases where we have rm evidence for the co-existence of a nuclear star cluster with a central supermassive black hole, Sagittarius A*. The number density of stars in the Galactic center nuclear star cluster can be well described, at distances & 1 pc from Sagittarius A*, by a power-law of the form (r) / r􀀀 with an index of 1:8. In the central parsec the index of the power-law becomes much flatter and decreases to 1:2. We present proper motions for more than 6000 stars within 1 pc in projection from the central black hole. The cluster appears isotropic at projected distances & 0:5 pc from Sagittarius A*. Outside of 0.5 pc and out to 1:0 pc the velocity dispersion appears to stay constant. A robust result of our Jeans modeling of the data is the required presence of 0:5 􀀀 2:0 106M of extended (stellar) mass in the central parsec of the Galaxy. en_US
dc.language.iso en_US en_US
dc.publisher Journal of Physics en_US
dc.relation RIT Scholars content from RIT Digital Media Library has moved from to RIT Scholar Works, please update your feeds & links!
dc.relation.ispartofseries vol. 131 en_US
dc.relation.ispartofseries 9 pgs. en_US
dc.title The Nuclear star cluster of the Milky Way en_US
dc.type Proceedings en_US

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