Maser Emission from a Keplerian Annulus

Details Maser Emission from a Keplerian Annulus Maser Emission from a Keplerian Annulus

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..340..238u&link_type=abstract

Future Directions in High Resolution Astronomy: The 10th Anniversary of the VLBA, ASP Conference Proceedings, Vol. 340. Edited

Astronomy and Astrophysics

Astronomy

Scientific paper

We study the maser emission from a gaseous annulus in keplerian rotation around a central mass observed edge-on. The absorption coefficient within the annulus is assumed to follow a power law dependence with the distance from the central mass (κ=κ0 r-q). We calculated position-velocity diagrams for the most intense maser features, for different values of q. We found that, depending on the value of q, these diagrams can be qualitatively different. The most intense maser emission at a given velocity can either come mainly from regions close to the inner or outer edges of the annulus or from the line perpendicular to the line of sight and passing through the central mass (as it is commonly assumed).

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