Fine structure and refractive scattering of the H2O maser in star-forming region W49N

Fine structure and refractive scattering of the H2O maser in star-forming region W49N

We used the unprecedented resolution of ∼25 μas of the VLBI array formed with the RadioAstron satellite to study the structures of H2O maser spots in the star forming region W49N. We found that anisotropic diffractive scattering of the ISM dominates the images of the maser spot, but does not complet...

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Veröffentlicht in:Proceedings of the International Astronomical Union 2022-12, Vol.18 (S380), p.238-239
Hauptverfasser: Shakhvorostova, N. N., Moran, J. M., Alakoz, A. V., Imai, H., Gwinn, C. R., Sobolev, A. M.
Format: Artikel
Sprache:eng
Schlagworte:
Fine structure
Poster Paper
Scattering
Star formation
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Zusammenfassung:We used the unprecedented resolution of ∼25 μas of the VLBI array formed with the RadioAstron satellite to study the structures of H2O maser spots in the star forming region W49N. We found that anisotropic diffractive scattering of the ISM dominates the images of the maser spot, but does not completely blur them. The refractive scattering floor is about 0.001 in visibility at a baseline of 8 Gλ.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921323003460