DOI QR코드

DOI QR Code

VLBI STUDIES OF Sgr A*

  • SHEN ZHI-QIANG (Shanghai Astronomical Observatory, Chinese Academy of Sciences)
  • Published : 2005.06.01

Abstract

This paper reviews the progress in the VLBI (Very Long Baseline Interferometry) studies of Sgr A$\ast$, the best known supermassive black hole candidates with a dark mass concentration of $4 {\times} 10^6 M_{\bigodot}$ at the center of the Milky Way. The emphasis is on the importance of the millimeter and sub-millimeter VLBI observations in the detection of Sgr A$\ast$'s intrinsic structure and search for the structural variation.

Keywords

Galaxy: center;galaxies: individual (Sagittarius A;techniques: interferometric

References

  1. Aharonian, F., et al., 2004, A&Ap, 425, L13 https://doi.org/10.1051/0004-6361:200400055
  2. Aitken, D. K., et al., 2000, ApJ, 534, L173 https://doi.org/10.1086/312685
  3. Alberdi, A., et al., 1993, A&Ap, 277, L1
  4. Backer, D. C., et al., 1993, Science, 262, 1414 https://doi.org/10.1126/science.262.5138.1414
  5. Baganoff, F. K., et al., Nature, 2001, 413, 45 https://doi.org/10.1038/35092510
  6. Balick, B., & Brown, R. L., 1974, ApJ, 194, 265 https://doi.org/10.1086/153242
  7. Bower, G. C., & Backer, D. C., 1998, ApJ, 496, L97 https://doi.org/10.1086/311259
  8. Bower, G. C., Falcke, H., & Backer, D. C., 1999, ApJ, 523, L13
  9. Bower, G. C., et al., 2004, Science, 304, 704 https://doi.org/10.1126/science.1094023
  10. Bower, G. C., et al., 2005, ApJ, 618, L29 https://doi.org/10.1086/427498
  11. Bromley, B. C., Melia, F., & Liu, S., 2001, ApJ, 555, L83 https://doi.org/10.1086/321447
  12. Brown, R. L., & Lo, K. Y., 1982, ApJ, 253, 108 https://doi.org/10.1086/159615
  13. Davies, R. D., Walsh, D., & Booth, R. S., 1976, MNRAS, 177, 319 https://doi.org/10.1093/mnras/177.2.319
  14. Doeleman, S. S., et al., 2001, AJ, 121, 2610 https://doi.org/10.1086/320376
  15. Eckart, A., et al., 2004, A&A, 427, 1
  16. Eisenhauer, F., et al., 2003, ApJ, 597, L121 https://doi.org/10.1086/380188
  17. Falcke, R., et al., 1998, ApJ, 499, 731 https://doi.org/10.1086/305687
  18. Falcke, R. ,& Markoff, S., 2000, A&A, 362, 113
  19. Falcke, H., Melia, F., & Agol, E., 2000, ApJ, 528, L13 https://doi.org/10.1086/312423
  20. Genzel, R., et al., 2003, Nature, 425, 934. https://doi.org/10.1038/nature02065
  21. Ghez, A. M., et al., 2003, ApJ, 586, L127 https://doi.org/10.1086/374804
  22. Ghez, A. M., et al., 2004, ApJ, 601, L59 https://doi.org/10.1086/381800
  23. Ghez, A. M., et al., 2005, ApJ (in press)
  24. Goldwurn, A., et al., 2003, ApJ, 584, 751 https://doi.org/10.1086/345749
  25. Herrnstein, R. M., et al., 2004, AJ, 127, 3399 https://doi.org/10.1086/420711
  26. Kosack, K., et al., 2004, ApJ, 608, L97 https://doi.org/10.1086/422469
  27. Junor, W., Biretta, J. A., & Livio, M., 1999, Nature, 401, 891 https://doi.org/10.1038/44780
  28. Kelllermann, K. I., et al.,1977, ApJ, 214, L61 https://doi.org/10.1086/182443
  29. Kelllermann, K. I., & Moran, J. M., 2001, ARA&A, 39, 457 https://doi.org/10.1146/annurev.astro.39.1.457
  30. Krichbaum, T. P., et al., 1993, A&Ap, 274, L37
  31. Krichbaum, T. P., et al., 1998, A&Ap, 335, L106
  32. Krichbaum, T. P., Witzel, A., & Zensus, J. A., 1999, in ASP Conf. Ser. 186, 89
  33. Lo, K. Y., et al., 1975, ApJ, 202, L63 https://doi.org/10.1086/181982
  34. Lo, K. Y., et al., 1977, ApJ, 218, 668 https://doi.org/10.1086/155723
  35. Lo, K. Y., et al., 1981, ApJ, 249, 504 https://doi.org/10.1086/159309
  36. Lo, K. Y., et al., 1985, Nature, 315, 124 https://doi.org/10.1038/315124a0
  37. Lo, K. Y., et al., 1993, Nature, 362, 38 https://doi.org/10.1038/362038a0
  38. Lo, K. Y., et al., 1998, ApJ, 508, L61 https://doi.org/10.1086/311726
  39. Lynden-Bell, D., & Rees, M. J., 1971, MNRAS, 152, 461 https://doi.org/10.1093/mnras/152.4.461
  40. Marcaide, J. M., et al., 1992, A&Ap, 258, 295
  41. Marcaide, J. M., et al., 1999, A&Ap, 343, 801
  42. Melia, F., & Falcke, H., 2001, ARA&A, 39, 309 https://doi.org/10.1146/annurev.astro.39.1.309
  43. Miyazaki, A., et al., 2004, ApJ, 611, L97 https://doi.org/10.1086/424004
  44. Miyoshi, M., et al., 1995, Nature, 373, 127 https://doi.org/10.1038/373127a0
  45. Miyoshi, M., et al., 2004, ALMA Memo, No. 499
  46. Porquet, D., et al., 2003, A&Ap, 407, L17 https://doi.org/10.1051/0004-6361:20030983
  47. Reid, M. J., 1993, ARA&A, 31, 345 https://doi.org/10.1146/annurev.aa.31.090193.002021
  48. Reid, M. J., & Brunthaler, A., 2004, ApJ, 616, 872 https://doi.org/10.1086/424960
  49. Rogers, A. E. E., et al., 1994, ApJ, 434, L59 https://doi.org/10.1086/187574
  50. Sault, R. J.,& J.-P. Macquart, 1999, ApJ, 526, L85 https://doi.org/10.1086/312378
  51. Schodel, R., et al., 2002, Nature, 419, 694 https://doi.org/10.1038/nature01121
  52. Schodel, R., et al., 2003, ApJ, 596, 1015 https://doi.org/10.1086/378122
  53. Shen, Z.-Q., & Fletcher, A. B., 2002, in 2002 KVN Science Workshop Proceeding, 57
  54. Shen, Z.-Q., et al., 2003, Astron. Nachr., 324(S1), 383 https://doi.org/10.1002/asna.200385090
  55. Shen, Z.-Q., et al., 2004, in preparation
  56. Shen, Z.-Q., & Lo, K. Y., 2004, Theoretical Physics Supplement, 155, 413 https://doi.org/10.1143/PTPS.155.413
  57. Tsuchiya, K., et al., 2004, ApJ, 606, L115 https://doi.org/10.1086/421292
  58. Yuan, F., Markoff, S. ,& Falcke, H., 2002, A&A, 383, 854 https://doi.org/10.1051/0004-6361:20011709
  59. Yuan, F., Quataert, E., & Narayan, R., 2003, ApJ, 598, 301 https://doi.org/10.1086/378716
  60. Zhao, J.-H., 2003, Astron. Nachr., 324(S1), 355 https://doi.org/10.1002/asna.200385096
  61. Zhao, J.-H., et al., 2004, ApJ, 603, L85 https://doi.org/10.1086/383128
  62. Gwinn, C. R., et al., 1991, ApJ, 381, L43 https://doi.org/10.1086/186192
  63. Jauncey, D. L., et al., 1989, AJ, 98, 44 https://doi.org/10.1086/115125

Cited by

  1. Intra-Day Variability of Sagittarius A* at Multi-Wavelengths vol.32, pp.1-2, 2011, https://doi.org/10.1007/s12036-011-9070-z
  2. Properties of the radio-emitting gas around Sgr A* vol.2007, pp.03, 2007, https://doi.org/10.1088/1475-7516/2007/03/011