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The Galactic Center

Published online by Cambridge University Press:  01 August 2006

Reinhard Genzel  and
Vladimír Karas
Reinhard Genzel
Affiliation:
Max-Planck Institut für Extraterrestrische Physik, Garching, Germany Department of Physics, University of California, Berkeley, USA
Vladimír Karas
Affiliation:
Astronomical Institute, Academy of Sciences, Prague, Czech Republic
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Abstract

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In the past decade high resolution measurements in the infrared employing adaptive optics imaging on 10m telescopes have allowed determining the three dimensional orbits stars within ten light hours of the compact radio source at the center of the Milky Way. These observations show the presence of a three million solar mass black hole in Sagittarius A* beyond any reasonable doubt. The Galactic Center thus constitutes the best astrophysical evidence for the existence of black holes which have long been postulated, and is also an ideal ‘lab’ for studying the physics in the vicinity of such an object. Remarkably, young massive stars are present there and probably have formed in the innermost stellar cusp. Variable infrared and X-ray emission from Sagittarius A* are a new probe of the physical processes and space-time curvature just outside the event horizon.

Keywords

Galaxy: center – black hole physics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S238: Black Holes from Stars to Galaxies – Across the Range of Masses , August 2006 , pp. 173 - 180
Copyright
Copyright © International Astronomical Union 2007

References

Aharonian, F., Akhperjanian, A. G., Aye, K.-M. et al. 2004, A&A, 425, L13Google Scholar
Alexander, T. 2005, Phys. Rep., 419, 65CrossRefGoogle Scholar
Alexander, T. & Livio, M. 2004, 606, L21CrossRefGoogle Scholar
Allen, D. A. & Sanders, R. 1986, Nature, 319, 191CrossRefGoogle Scholar
Allen, D. A., Hyland, A. R. & Hillier, D. J. 1990, MNRAS, 244, 706Google Scholar
Aschenbach, B., Grosso, N., Porquet, D. & Predehl, P. 2004, A&A, 417, 71Google Scholar
Backer, D. C. & Sramek, R. A. 1999, ApJ, 524, 805CrossRefGoogle Scholar
Baganoff, F., Bautz, M. W., Brandt, W. N. et al. 2001, Nature, 413, 45CrossRefGoogle Scholar
Balick, B., Brown, R. 1974, ApJ, 194, 265CrossRefGoogle Scholar
Bardeen, J. M. 1973, in Black Holes, eds. DeWitt, C. & DeWitt, B. S. (New York: Gordon & Breach), p. 215Google Scholar
Beckers, J. M. 1993, ARAA, 31, 13CrossRefGoogle Scholar
Becklin, E. E. & Neugebauer, G. 1975, ApJ, 200, L71CrossRefGoogle Scholar
Becklin, E. E., Matthews, K., Neugebauer, G. & Willner, S. P. 1978, ApJ, 219, 121CrossRefGoogle Scholar
Bélanger, G., Terrier, R., De Jager, O. C., Goldwurm, A. & Melia, F. 2006, J. Phys., 54, 420Google Scholar
Bower, G. C.Falcke, H.Herrnstein, R. M.Zhao, Jun-HuiGoss, W. M. & Backer, D. C. 2004, Science, 304, 704CrossRefGoogle Scholar
Broderick, A., Loeb, A. 2006, MNRAS, 367, 905CrossRefGoogle Scholar
Bromley, B. C., Melia, F. & Liu, Siming, 2001, ApJ, 555, L83CrossRefGoogle Scholar
Eckart, A. & Genzel, R. 1996, Nature, 383, 415CrossRefGoogle Scholar
Eckart, A. & Genzel, R. 1997, MNRAS, 284, 576CrossRefGoogle Scholar
Eckart, A., Baganoff, F. K., Schödel, R. et al. 2006a, A&A, 450, 535Google Scholar
Eckart, A., Schödel, R., Meyer, L., Trippe, S., Ott, T. & Genzel, R. 2006b, A&A, 455, 1Google Scholar
Eisenhauer, F., Abuter, R., Bickert, K. et al. 2003b, Proc. SPIE, 4841, 1548CrossRefGoogle Scholar
Eisenhauer, F., Genzel, R., Alexander, T. et al. 2005a, ApJ, 628, 246CrossRefGoogle Scholar
Eisenhauer, F., Perrin, G., Rabien, S., et al. 2005b, AN, 326, 561Google Scholar
Eisenhauer, F., Schödel, R., Genzel, R. et al. 2003a, ApJ, 597, L121CrossRefGoogle Scholar
Falcke, H., Melia, F. & Agol, E. 2000, ApJ, 528, L13CrossRefGoogle Scholar
Forrest, W. J., Shure, M. A., Pipher, J. L. & Woodward, C. A. 1987, in The Galactic Center, AIP Conf. 155, ed. Backer, D. C. (New York: AIP), 153Google Scholar
Genzel, R., Hollenbach, D. & Townes, C. H. 1994, Rep. Prog. Phys., 57, 417CrossRefGoogle Scholar
Genzel, R., Schödel, R., Ott, T. et al. 2003a, Nature, 425, 934CrossRefGoogle Scholar
Genzel, R., Schödel, R., Ott, T. et al. 2003b, ApJ, 594, 812CrossRefGoogle Scholar
Ghez, A. M., Duchêne, G., Matthews, K. et al. 2003, ApJ, 586, L127CrossRefGoogle Scholar
Ghez, A. M., Klein, B. L., Morris, M. & Becklin, E. E. 1998, ApJ, 509, 678CrossRefGoogle Scholar
Ghez, A. M., Hornstein, S. D., Lu, J. R. et al. 2005a, ApJ, 635, 1087CrossRefGoogle Scholar
Ghez, A. M., Salim, S., Hornstein, S. D. et al. 2005b, ApJ, 620, 744CrossRefGoogle Scholar
Gillessen, S., Eisenhauer, F., Quataert, E. et al. 2006a, ApJ, 640, L163CrossRefGoogle Scholar
Gillessen, S., Perrin, G., Brandner, W. et al. 2006b, in Advances of Stellar Interferometry, eds. Monnier, J. D. et al. , Proc. SPIE, vol. 6268, 626811CrossRefGoogle Scholar
Hansen, B. M. S. & Milosavljević, M. 2003, ApJ, 593, L80CrossRefGoogle Scholar
Horák, J. & Karas, V. 2006, MNRAS, 365, 813CrossRefGoogle Scholar
Krabbe, A., Iserlohe, C., Larkin, J. E. et al. 2006, ApJ, 642, L145CrossRefGoogle Scholar
Lenzen, R., Hofmann, R., Bizenberger, P. & Tusche, A. 1998, Proc. SPIE, 3354, 606CrossRefGoogle Scholar
Liu, S., Melia, F. & Petrosian, V. 2005, ApJ, 636, 798CrossRefGoogle Scholar
Maoz, E. 1998, ApJ, 494, L181CrossRefGoogle Scholar
Markoff, S., Falcke, H., Yuan, F. & Biermann, P. L. 2001, A&A, 379, L13Google Scholar
Marrone, D., Moran, J. M., Zhao, J.-H. & Rao, R. 2006, ApJ, 640, 308CrossRefGoogle Scholar
McMillan, S. L. W. & Portegies, Zwart S. F. 2003, ApJ, 596, 314CrossRefGoogle Scholar
Meyer, L., Eckart, A., Schödel, R., Duschl, W. J., Muzic, K.Dovčiak, M. & Karas, V. 2006a, A&A, 460, 15Google Scholar
Meyer, L., Schödel, R., Eckart, A., Karas, V., Dovčiak, M. & Duschl, W. J. 2006b, A&A, 458, L25Google Scholar
Miller, J. C., Shahbaz, T. & Nolan, L. A. 1998, MNRAS, 29Google Scholar
Morris, M. 1993, ApJ, 408, 496CrossRefGoogle Scholar
Paumard, T., Genzel, R., Martins, F. et al. 2006a, ApJ, 643, 1011CrossRefGoogle Scholar
Paumard, T., Mueller, T., Genzel, R., Eisenhauer, F. & Gillesen, S. 2006, in preparationGoogle Scholar
Paumard, T., Perrin, G., Eckart, A. et al. 2005, AN, 326, 568Google Scholar
Reid, M. J. & Brunthaler, A. 2004, ApJ, 616, 872CrossRefGoogle Scholar
Roberts, D. A. & Goss, W. M. 1993, ApJSS, 86, 133CrossRefGoogle Scholar
Rousset, G., Lacombe, F., Puget, P. et al. 1998, in Adaptive Optical System Technologies, eds. Bonaccini, D. & Tyson, R. K., Proc. SPIE, vol. 3255, 508CrossRefGoogle Scholar
Schödel, R., Ott, T., Genzel, R. et al. 2002, Nature, 419, 694CrossRefGoogle Scholar
Schödel, R., Ott, T., Genzel, R. et al. 2003, ApJ, 596, 1015CrossRefGoogle Scholar
Schödel, R., Eckart, A., Alexander, T. et al. 2006, A&A, in press (astro-ph/0703178)Google Scholar
Shen, Z. Q., Lo, K. Y., Liang, M. C., Ho, P. T. P. & Zhao, J. H. 2005, Nature, 438, 62CrossRefGoogle Scholar
Šubr, L. & Karas, V. 2005, A&A, 433, 405Google Scholar
Weinberg, N. N., Milosavljevic, M. & Ghez, A. M. 2005, ApJ, 622, 878CrossRefGoogle Scholar
Wollman, E. R., Geballe, T. R., Lacy, J. H., Townes, C. H. & Rank, D. M. 1977, ApJ, 218, L103CrossRefGoogle Scholar
Yuan, F., Quataert, E. & Narayan, R. 2003, ApJ, 598, 301CrossRefGoogle Scholar
Yusef-Zadeh, F., Bushouse, H., Dowell, C. D et al. 2006, ApJ, 644, 198CrossRefGoogle Scholar
Zucker, S., Alexander, T., Gillessen, S., Eisenhauer, F. & Genzel, R. 2006, ApJ, 639, L21CrossRefGoogle Scholar