Abstract
VLBA and EVN radio observations of H2O masers at 22 GHz and methanol masers at 6.67 GHz have been used to obtain images of the maser spots in the infrared object GL 2789, which is associated with the young stellar object V645 Cyg. The position of these masers coincides with that of the optical object to within \(0''.2\). The maser spots are located in a line oriented north-south, and their positions and radial velocities can be described by a model with a Keplerian disk with maximum radius 40 AU for the H2O masers and 800 AU for the methanol masers. The H2O and methanol masers spots are unresolved, and the lower limits for their brightness temperatures are 2×1013 K and 1.4×109 K, respectively. A model in which the maser radiation is formed in extended water-methanol clouds associated with ice planets forming around the young star is proposed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
M. Cohen, Astrophys. J. 215, 533 (1977).
R. M. Humphreys, K. M. Merrill, and J. H. Black, Astrophys. J. Lett. 237, L17 (1980).
R. W. Goodrich, Astrophys. J. 311, 882 (1986).
A. Schulz, J. H. Black, C. J. Lada, et al., Astrophys. J. 341, 288 (1989).
J. M. Torrelles, G. Anglada, L. F. Rodríguez, et al., Astron. Astrophys. 177, 171 (1987).
S. L. Skinner, A. Brown, and R. T. Stewart, Astrophys. J., Suppl. Ser. 87, 217 (1993).
C. J. Lada, L. Blitz, M. J. Reid, and J. M. Moran, Astrophys. J. 243, 769 (1981).
G. Tofani, M. Felli, G. B. Taylor, and T. R. Hunter, Astron. Astrophys., Suppl. Ser. 112, 299 (1995).
M. Morris and I. Kazés, Astron. Astrophys. 111, 239 (1982).
V. I. Slysh, I. E. Val’tts, S. V. Kalenskii, et al., Astron. Astrophys., Suppl. Ser. 134, 115 (1999).
V. Migenes, S. Horiuchi, V. I. Slysh, et al., Astrophys. J., Suppl. Ser. 123, 487 (1999).
M. Szymczak, G. Hrynek, and A. J. Kus, Astron. Astrophys., Suppl. Ser. 143, 269 (2000).
V. Minier, R. S. Conway, and R. S. Booth, Astron. Astrophys. 362, 1093 (2000).
M. Miyoshi, J. Moran, J. Herrnstein, et al., Nature 373, 127 (1995).
R. Genzel, D. Downes, J. M. Moran, et al., Astron. Astrophys. 66, 13 (1978).
J. M. Torrelles, J. F. Gomez, L. F. Rodríguez, et al., Astrophys. J. 489, 744 (1997).
F. Hamann and S. E. Persson, Astrophys. J. 339, 1078 (1989).
V. I. Slysh, I. E. Val’tts, S. V. Kalenskii, et al., Astron. Zh. 76, 751 (1999) [Astron. Rep. 43, 657 (1999)].
E. Dartois, W. Shutte, T. R. Geballe, et al., Astron. Astrophys. 342, L32 (1999).
W. A. Shutte, A. G. G. M. Tielens, D. C. Whittet, et al., Astron. Astrophys. 315, L333 (1996).
C. J. Skinner, A. G. G. M. Tielens, M. J. Barlow, and K. Justtanont, Astrophys. J. Lett. 399, L79 (1992).
Author information
Authors and Affiliations
Additional information
__________
Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 79, No. 12, 2002, pp. 1074–1086.
Original Russian Text Copyright © 2002 by Slysh, Voronkov, Val’tts, Migenes.
Rights and permissions
About this article
Cite this article
Slysh, V.I., Voronkov, M.A., Val’tts, I.E. et al. Methanol and H2O masers in a disk around GL 2789. Astron. Rep. 46, 969–980 (2002). https://doi.org/10.1134/1.1529255
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1134/1.1529255