Hostname: page-component-6d856f89d9-jhxnr Total loading time: 0 Render date: 2024-07-16T08:21:16.836Z Has data issue: false hasContentIssue false
  • English
  • Français

The fine spatial structure of methanol masers as an evidence in support of their connection with bipolar outflows

Published online by Cambridge University Press:  03 August 2017

Vyacheslav I. Slysh ,
Irina E. Val'tts  and
Sergei V. Kalenskii
Vyacheslav I. Slysh
Affiliation:
Astro Space Center, Lebedev Physical Institute, Profsoyuznaya str. 84/32, 117 810 Moscow, Russia
Irina E. Val'tts
Affiliation:
Astro Space Center, Lebedev Physical Institute, Profsoyuznaya str. 84/32, 117 810 Moscow, Russia
Sergei V. Kalenskii
Affiliation:
Astro Space Center, Lebedev Physical Institute, Profsoyuznaya str. 84/32, 117 810 Moscow, Russia

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 studied class I methanol masers in the transition 70 − 61A+ at the frequency 44 GHz with the VLA. The observations on the VLA were made with the angular resolution 0.1, which was the highest at the moment. It was shown that the masers consist of chains of unresolved spots located on curved lines or arcs. The length of such arcs is from 20 to 1000 AU and the brightness temperature of the strongest masers exceeds 3.6×108 K. The observed location of maser spots is in agreement with their position at the border line between molecular outflows and surrounding molecular clouds. The high brightness temperature implies that the maser condensations have enhanced abundance of methanol due to evaporation of methanol from the surface of dust grains. The mass of maser condensations is less than 4×10−5 M⊙ and corresponds to planetary masses.

Type
Part 1. Star Formation
Information
Symposium - International Astronomical Union , Volume 206: Cosmic Masers: From Protostars to Blackholes , 2002 , pp. 199 - 202
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

Batrla, W. & Menten, K.M. 1998, ApJ, 329, L117 CrossRefGoogle Scholar
Kogan, L.R. & Slysh, V.I. 1998, ApJ, 497, 800 CrossRefGoogle Scholar
Liechti, S. & Walmsley, C.M. 1997, A&A, 321, 625 Google Scholar
Menten, K.M., Walmsley, S.M., Henkel, C., & Wilson, T.L. 1998, A&A, 198, 253 Google Scholar
Plambeck, R.L. & Menten, K.M. 1990, ApJ, 364, 555 Google Scholar
Pratap, P. & Menten, K.M. 1992, Proc. Conf. Astrophysical Masers, Clegg, A. & Nedoluha, G., Eds., Lect. Notes. Phys., Vol. 103, p. 211 (Springer-Verlag: Heidelberg)Google Scholar
Slysh, V.I., Kalensky, S.V., Val'tts, I.E., & Otrupcek, R. 1994, MNRAS, 268, 464 CrossRefGoogle Scholar
Slysh, V.I., Val'tts, I.E., Kalenskii, S.V., & Golubev, V.V. 1999, Astronomy Reports, 43, 785 Google Scholar