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|Title:||Ethynyl Around the HII Regions S255 and S257|
|Authors:||Buslaeva, A. I.|
Kirsanova, M. S.
Punanova, A. F.
|Citation:||Buslaeva A. I. Ethynyl Around the HII Regions S255 and S257 / A. I. Buslaeva, M. S. Kirsanova, A. F. Punanova. — DOI 10.1134/S1063772921060020 // Astronomy Reports. — 2021. — Vol. 65. — Iss. 6. — P. 488-497.|
|Abstract:||Abstract: We present the results of the ethynyl (C2H) emission line observations towards the S255 and S257 HII regions and the molecular cloud between them. Radial profiles of line brightness, column density, and abundance of C2H are obtained. We show that the radial profile of the ethynyl abundance is almost flat towards the HII regions and drops by a factor of two towards the molecular cloud. At the same time, we find that the ethynyl abundance is at maximum towards the point sources in the molecular cloud—the stars with emission lines or emitting in X-ray. Line profiles are consistent with the assumption that both HII regions have front and back neutral walls those move relative to each other. © 2021, Pleiades Publishing, Ltd.|
|metadata.dc.description.sponsorship:||We are grateful to L.E. Pirogov, S.V. Kalenskii for valuable advice during the processing of observational data, to D.A. Semenov for a discussion of the chemistry of ethynyl, and to anonymous referee for valuable comments. This study was supported by Russian Foundation for Basic Research (contract No. 20-02-00643 А). Anna Punanova is a member of the Max-Planck-Gesellschaft partner group in the Ural Federal University. Anna Punanova is supported by the Russian Ministry of Science and Higher Education via state assignment FEUZ-2020-0038.|
|Appears in Collections:||Научные публикации, проиндексированные в SCOPUS и WoS CC|
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