RadioAstron probes the ultra-fine spatial structure in the H2O maser emission in the star forming region W49N
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.
- Publication:
-
Advances in Space Research
- Pub Date:
- January 2020
- DOI:
- 10.1016/j.asr.2019.05.011
- arXiv:
- arXiv:1905.02440
- Bibcode:
- 2020AdSpR..65..772S
- Keywords:
-
- Galactic H<SUB>2</SUB>O masers;
- Star-forming regions;
- Space VLBI;
- Astrophysics - Astrophysics of Galaxies;
- Astrophysics - Instrumentation and Methods for Astrophysics
- E-Print:
- Accepted for publication in Advances in Space Research