Flares of the H2O Maser Emission in the Young Stellar Object GH2O 092.67+03.07 (IRAS 21078+5211)

The results of monitoring the H 2 O maser observed toward the region GH 2 O 092.67+03.07 (IRAS 21078+5211) located in the Giant Molecular Cloud Cygnus OB7 are presented. The observations were carried out with the 22-m radio telescope of the Pushchino Radio Astronomy Observatory in 2006–2017. Strong...

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Bibliographic Details
Published in:Astronomy reports 2018-03, Vol.62 (3), p.200-212
Main Authors: Krasnov, V. V., Lekht, E. E., Minnebaev, V. M., Pashchenko, M. I., Rudnitskii, G. M., Tolmachev, A. M.
Format: Article
Language:English
Subjects:
Astronomy
Emission
Emissions
Flares
Fluxes
Observations and Techniques
Physics
Physics and Astronomy
Radio astronomy
Radio telescopes
Turbulence
Water masers
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Summary:The results of monitoring the H 2 O maser observed toward the region GH 2 O 092.67+03.07 (IRAS 21078+5211) located in the Giant Molecular Cloud Cygnus OB7 are presented. The observations were carried out with the 22-m radio telescope of the Pushchino Radio Astronomy Observatory in 2006–2017. Strong flares of the H 2 O maser emission with flux densities up to 19 800 Jy were detected. The flares exhibited both global (over the source) and local characters. All the flares were accompanied by strong variations in the H 2 O spectra within the corresponding radial-velocity ranges. Individual H 2 O components form both compact clusters and chains 1–2-AU long. Analysis of the variations of the fluxes, radial velocities, and line shapes of features during the flares showed that the medium may be strongly fragmented, with small-scale turbulent motions taking place in the H 2 Omaser region.
ISSN:1063-7729
1562-6881
DOI:10.1134/S106377291803006X