Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
권호 표지
DOI QR코드

DOI QR Code

POSITIONAL COINCIDENCE BETWEEN WATER MASERS AND A PLASMA TORUS IN NGC 1052

  • SAWADA-SATOH SATOKO (Academia Sinica Institute of Astronomy and Astrophysics) ;
  • KAMENO SEIJI (National Astronomical Observatory of Japan) ;
  • SHIBATA KATSUNORI M. (National Astronomical Observatory of Japan) ;
  • INOUE MAKOTO (National Astronomical Observatory of Japan)
  • Published : 2005.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

We present results of the VLBA observation toward the radio continuum and water maser emissions in a nearby LINER galaxy NGC 1052. The jet structure observed in 2000 is similar to that in 1998, and the two jet structures in 1998 and 2000 support the sub-luminal motion with apparent velocity of 0.26c. Distribution of water maser spots are located ${\~}$0.05 pc shifted to southwest from the component which is supported to be the nucleus, and no rapid positional change of the water maser gas with respect to the central engine is seen from 1995 to 2000. The maser gas is positionally coincident with a plasma torus, and the position of the maser gas relative to the nucleus is stable from 1995 to 2000. The maser gas in NGC 1052 could be explained to be associated with the nuclear circumnuclear torus or disk like the situation found in the nucleus of NGC 4258.

Keywords

References

  1. Braatz, J. A., Wilson, A. S., & Henkel, C., 1994, ApJ, 437, L99 https://doi.org/10.1086/187692
  2. Braatz, J. A., Wilson, A. S., & Henkel, C., 1996, ApJS, 106, 51 https://doi.org/10.1086/192328
  3. Braatz, J. A., Wilson, A. S., & Henkel, C., 1997, ApJS, 110, 321 https://doi.org/10.1086/312999
  4. Braatz, J. A., Wilson, A. S., Henkel, C., Gough, R., & Sinclair, M., 2003, ApJS, 146, 249 https://doi.org/10.1086/374417
  5. Claussen, M. J., Diamond, P. J., Braatz, J. A., Wilson, A. S., & Henkel, C., 1998, ApJ, 500, L129 https://doi.org/10.1086/305701
  6. de Vaucouleurs, G., 1991, Third Reference Catalogue of bright galaxies
  7. Herrnstein, J. R. Greenhill, L. J., & Moran, J. M., 1996, ApJ, 468, L17 https://doi.org/10.1086/177666
  8. Jones, D. L., Wrobel, J. M., & Shaffer, D. B., 1984, ApJ, 276, 480 https://doi.org/10.1086/161636
  9. Kadler, M., Kerp, J., Ros, E., Falcke, H., Pogge, R. W., & Zensus, J. A., 2004(a), A&A, 420, 467 https://doi.org/10.1051/0004-6361:20034126
  10. Kadler, M., Ros, E., Lobanov, A. P., Falcke, H., & Zensus, J. A., 2004(b), A&A, 426, 481 https://doi.org/10.1051/0004-6361:20041051
  11. Kameno, S., Sawada-Satoh, S., Inoue, M., Shen, Z., & Wajima, K., 2001, PASJ, 53, 169 https://doi.org/10.1093/pasj/53.2.169
  12. Kameno, S., Inoue, M., Wajima, K., Sawada-Satoh, S., & Shen, Z.-Q., 2003, Publ. of the Astron. Soc. of Australia, 20, 134 https://doi.org/10.1071/AS03003
  13. Kameno, S., Nakai, N., Sawada-Satoh, S., Sato, & N., Haba, A., 2005 in press
  14. Kellermann, K. I., Vermeulen, R. C., Zensus, J. A., & Cohen, M. H., 1998, AJ, 115, 1295 https://doi.org/10.1086/300308
  15. Knapp, G. R., Faber, S. M., & Gallagher, J. S., 1978, AJ, 174, L123
  16. Maloney, P. R., 2002, Publications of the Astronomical Society of Australia, 19, 401 https://doi.org/10.1071/AS01100
  17. Neufeld, D. A. & Malony, P. R., 1995, ApJ, 447, L17
  18. Peck, A. B., Henkel, C., Ulvestad, J. S., Brunthaler, A., Falcke, H., Elitzur, M., Menten, K. M., & Gallimore, J. F., 2003, ApJ, 590, 149 https://doi.org/10.1086/374924
  19. Vermeulen, R. C., Ros, E., Kellermann, K. I., Cohen, M. H., Zensus, J. A., & van Langevelde. H. J., 2003, A&A, 401, 113 https://doi.org/10.1051/0004-6361:20021752
  20. Wrobel, J. M., 1984, ApJ, 284, 531 https://doi.org/10.1086/162436