Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apj...559..402g&link_type=abstract
The Astrophysical Journal, Volume 559, Issue 1, pp. 402-418.
Astronomy and Astrophysics
Astronomy
6
Stars: Circumstellar Matter, Radio Lines: Stars, Stars: Emission-Line, Be
Scientific paper
Observations of the H30α (231 GHz) and H35α (147 GHz) recombination lines from MWC 349-we assume from the MWC 349A star-from 1997 May through 2000 June show variations in the intensities and radial velocities of the strongly masing, double-peaked lines on scales of a few weeks to a few months. The data include a few observations of the H40α (99 GHz) line during this period. We examine intensities, widths, and radial velocities of the line components and intensities of the free-free continuum emission. We detect both positive and negative correlations between the variations of some of these parameters, as well as a lack of correlation. We consider these results in terms of a differentially rotating, inhomogeneous disk viewed edge-on, having a considerable radial component of gas motion and surrounding a central object with strong, variable UV emission.
Gordon Mark A.
Holder Benjamin P.
Jisonna J. Jr. L.
Jorgenson Regina A.
Strelnitski Vladimir S.
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