The Milky Way’s Black Hole and the Central Stellar Cluster: Variable Emission from SgrA
The dark mass located at the center of the Milky Way is currently the very best candidate for a super massive black hole in our immediate vicinity. The strongest evidence for this is provided by measurements of stellar orbits and strongly variable NIR and X-ray emission from Sagittarius A* at the center of the cental stellar cluster. As proven by the Keplerian orbits of several of the high velocity stars within the central arcsecond the Galactic Center harbors a ∼ 3.5 × 106M⊙ massive black hole at the position of the compact radio source SgrA*. Simultaneous NIR/Xray observations of SgrA* in 2003/2004 have revealed first insights into the emission mechanisms of both the powerful near-infrared flares and the “quiescent” emission from within a few ten to one hundred Schwarzschild radii of the super-massive black hole at the center of the Milky Way. The central source shows synchronous NIR/X-ray flare variation and indications of quasi-periodicity within the NIR flares.
KeywordsBlack Hole Dark Particle Matter Asymptotic Giant Branch Stellar Cluster Asymptotic Giant Branch Star
Unable to display preview. Download preview PDF.
- Baganoff, F. K. et al., 2003, HEAD, 35.Google Scholar
- Leinert, C., & Graser, U., 1998, in Proc. SPIE Vol. 3350, p. 389–393, Astronomical Interferometry, Robert D. Reasenberg; Ed.Google Scholar
- Mielke, E., & Schunck, F., 2000, Nucl. Phys. B, 594, 1985Google Scholar
- Mouawad, N, Eckart, A., Pfalzner, S., et al., 2004, Astron. Nachrichten submitted.Google Scholar
- Viemann, T., Eckart, A., Schödel, R., Moultaka, J., Straubmeier, C., L-and M-band Imaging Observations of the Galactic Center Region, 2005, A&A in pressGoogle Scholar