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RadioAstron probes the ultra-fine spatial structure in the H2O maser emission in the star forming region W49N |
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| Institution: | 1. Astro Space Center, Lebedev Physical Institute, Russian Academy of Sciences, 84/32 Profsoyuznaya st., Moscow, GSP-7, 117997, Russia;2. Astronomical Observatory, Institute for Natural Sciences and Mathematics, Ural Federal University, 19 Mira street, Ekaterinburg 620002, Russia;3. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA;4. Center for General Education, Kagoshima University, 1-21-30 Korimoto, Kagoshima 890-0065, Japan |
| Abstract: | H2O maser emission associated with the massive star formation region W49N were observed with the Space-VLBI mission RadioAstron. The procedure for processing of the maser spectral line data obtained in the RadioAstron observations is described. Ultra-fine spatial structures in the maser emission were detected on space-ground baselines of up to 9.6 Earth diameters. The correlated flux densities of these features range from 0.1% to 0.6% of the total flux density. These low values of correlated flux density are probably due to turbulence either in the maser itself or in the interstellar medium. |
| Keywords: | Star-forming regions Space VLBI |
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