Hostname: page-component-7bb8b95d7b-cx56b Total loading time: 0 Render date: 2024-09-26T17:38:04.507Z Has data issue: false hasContentIssue false
  • English
  • Français

The Compact Nonthermal Radio Source at the Galactic Center: an Update

Published online by Cambridge University Press:  23 September 2016

K. Y. Lo
K. Y. Lo*
Affiliation:
Astronomy Department, University of Illinois 1011 W. Springfield Avenue Urbana, IL 61801, U. S. A.

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We review the current observational status of Sgr A∗, the compact nonthermal radio source at the galactic center. Sgr A∗ is a unique radio source at a unique location of the Galaxy. It is unlike any compact radio source associated with known stellar objects, but it is similar to extragalactic nuclear compact radio sources. The positional offset between Sgr A∗ and IRS16 places little constraint on the nature of the underlying energy source, since IRS16 need not be the core of the central star cluster. Sgr A∗ is still the best candidate for marking the location of a massive collapsed object.

Type
The Compact Central Objects
Information
Symposium - International Astronomical Union , Volume 136: The Galactic Center , 1989 , pp. 527 - 534
Copyright
Copyright © Kluwer 1989 

References

1. Balick, B., and Brown, R. L., 1974, Ap. J., 194, 265.CrossRefGoogle Scholar
2. Lo, K. Y. et al, 1985, Nature, 315, 124.CrossRefGoogle Scholar
3. Lynden-Bell, D., and Rees, M. J., 1971, MNRAS, 152, 461.CrossRefGoogle Scholar
4. Ekers, R. D., Lynden-Bell, D., 1971, Ap. Lett., 9, 189.Google Scholar
5. Downes, D., Martin, A., 1971, Nature, 233, 112.CrossRefGoogle Scholar
6. Lo, K. Y., 1987, AIP Proc. 155: Symposium honoring C. H. Townes, ed. Backer, D. C., (AIP; New York), 155, 30.Google Scholar
7. Kellerman, K. I., Shaffer, D. B., Clark, B. G., and Geldzahler, , Clark, B. G., 1977, Ap. J. (Lett.), 214, L61.CrossRefGoogle Scholar
8. Lo, K. Y., Cohen, M. H., Readhead, A. C. S., and Backer, D. C., 1981, Ap. J., 249, 504.CrossRefGoogle Scholar
9. Davies, R. D., Walsh, D., and Booth, R., 1976, MNRAS, 177, 319.CrossRefGoogle Scholar
10. Marcaide, J. M., et al, 1985, Conference on Active Galactic Nuclei, (ed. Dyson, J. E.; Manchester University Press), p. 53.Google Scholar
11. Zhou, J.H., Ekers, R., Goss, M., Lo, K. Y., Narayan, R., this volume.Google Scholar
12. Zylka, R., Mezger, P. G., 1988, Ast. & Ap., 190, L25.Google Scholar
13. Ozernoi, L. M., Shishov, V. I., 1977, Sov. Astron. (Lett.), 3, 233.Google Scholar
14. Rickett, B., 1986, Ap. J. 307, 564.CrossRefGoogle Scholar
15. Rickett, B., Coles, W., Bourgois, G., 1984, Ast. & Ap., 134, 390.Google Scholar
16. Romani, R., Narayan, R., Blandford, R., 1986, MNRAS, 220, 19.CrossRefGoogle Scholar
17. Backer, D. C., Sramek, R., 1982, Ap. J. 260, 512.CrossRefGoogle Scholar
18. Backer, D.C., Sramek, R., 1987, AIP Proc. 155: Symposium honoring C.H. Townes, ed. Backer, D. C., (AIP; New York), 155, 163.Google Scholar
19. Cordes, J., Ananthakrishnan, S., and Dennison, B., 1984, Nature, 309, 689.CrossRefGoogle Scholar
20. Reynolds, S., McKee, C., 1980, Ap. J., 239, 893.CrossRefGoogle Scholar
21. Engelke, C., 1988, Ap. J., 325, 153.CrossRefGoogle Scholar
22. Gusten, R., et al., 1987, Ap. J., 318, 124.CrossRefGoogle Scholar
23. Bartel, N. et al, 1982, Ap. J., 262, 556.CrossRefGoogle Scholar
24. Bash, F., Kaufman, M., 1986, Ap. J., 310, 621.CrossRefGoogle Scholar
25. Kellermann, K., Pauliny-Toth, I., 1981, Ann. Rev. Ast. & Ap., 19, 373.CrossRefGoogle Scholar
26. Begelman, M., Blandford, R., Rees, M., 1984, Rev. for Mod. Phys., 56, 255.CrossRefGoogle Scholar
27. Rees, M., Begelman, M., Blandford, R., Phinney, E., 1982, Nature, 295, 17.CrossRefGoogle Scholar
28. Rees, M., 1987, AIP Proc. 155: Symposium honoring C. H. Townes, ed. Backer, D.C., (AIP; New York), 155, 71.Google Scholar
29. Forrest, W., Shure, M., Pipher, J., Woodward, C., 1987, AIP Proc. 155: Symposium honoring C. H. Townes, ed. Backer, D. C., (AIP; New York), 155, 153.Google Scholar
30. Gurzadyan, V. G., Ozernoi, L. M., 1980, Ast. & Ap. 86, 315.Google Scholar
31. Ozernoi, L. M., 1987, AIP Proc. 155: Symposium honoring C. H. Townes, ed. Backer, D. C., (AIP; New York), 155, 181.Google Scholar
32. Allen, D. A., 1987, AIP Proc. 155: Symposium honoring C. H. Townes, ed. Backer, D. C., (AIP; New York), 155, 1.Google Scholar
33. Hall, D. N. B., Kleinman, S. G., and Scoville, N. Z., 1982, Ap.J. (Lett.), 262, L53.CrossRefGoogle Scholar
34. Allen, D. A., this volume.Google Scholar
35. Ramaty, R., and Lingenfelter, R. E., 1983, Highlights of Astronomy, 6, 525.CrossRefGoogle Scholar
36. Blandford, R. D., 1982, AIP Conf. Proc. 83, ed. Riegler, G., Blandford, R., (AIP; New York), 177.CrossRefGoogle Scholar
37. Serabyn, G., Lacy, J., 1985, Ap. J., 293, 445.CrossRefGoogle Scholar