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New OH Observations toward Northern Class I Methanol Masers

Published online by Cambridge University Press:  24 July 2012

I. E. Val'tts ,
I. D. Litovchenko ,
O. S. Bayandina ,
A. V. Alakoz ,
G. M. Larionov ,
D. V. Mukha ,
A. S. Nabatov ,
A. A. Konovalenko ,
V. V. Zakharenko  and
E. V. Alekseev
...Show all authors
I. E. Val'tts
Affiliation:
Astro Space Center of the Lebedev Physical Institute, Moscow, Russia email: ivaltts@asc.rssi.ru
I. D. Litovchenko
Affiliation:
Astro Space Center of the Lebedev Physical Institute, Moscow, Russia email: ivaltts@asc.rssi.ru
O. S. Bayandina
Affiliation:
Astro Space Center of the Lebedev Physical Institute, Moscow, Russia email: ivaltts@asc.rssi.ru
A. V. Alakoz
Affiliation:
Astro Space Center of the Lebedev Physical Institute, Moscow, Russia email: ivaltts@asc.rssi.ru
G. M. Larionov
Affiliation:
Astro Space Center of the Lebedev Physical Institute, Moscow, Russia email: ivaltts@asc.rssi.ru
D. V. Mukha
Affiliation:
Institute of Radio Astronomy of National Academie of Science, Kharkov, Ukraine
A. S. Nabatov
Affiliation:
Institute of Radio Astronomy of National Academie of Science, Kharkov, Ukraine
A. A. Konovalenko
Affiliation:
Institute of Radio Astronomy of National Academie of Science, Kharkov, Ukraine
V. V. Zakharenko
Affiliation:
Institute of Radio Astronomy of National Academie of Science, Kharkov, Ukraine
E. V. Alekseev
Affiliation:
Institute of Radio Astronomy of National Academie of Science, Kharkov, Ukraine
V. S. Nikolaenko
Affiliation:
Institute of Radio Astronomy of National Academie of Science, Kharkov, Ukraine
V. F. Kulishenko
Affiliation:
Institute of Radio Astronomy of National Academie of Science, Kharkov, Ukraine
S. A. Odincov
Affiliation:
National Center for Management and Testing of Space Resources, Evpatoriya, Ukraine
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Abstract

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Maser emission of OH(1720) is formed, according to modern concepts, under the influence of collisional pumping. Class I methanol masers (MMI) are also formed by a collisional mechanism of the inversion of the molecular levels. It is not excluded in this case that physical conditions in the condensations of the interstellar medium where masers are formed may be similar for MMI and OH(1720) masers, and they can associate with each other. To establish a possible association between these two kinds of masers, and obtain reliable statistical estimates, a survey of class I methanol masers at a frequency of 1720 MHz has been carried out.

Keywords

interstellar mediummasersmolecules
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S287: Cosmic Masers - from OH to H0 , January 2012 , pp. 294 - 295
Copyright
Copyright © International Astronomical Union 2012

References

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