Gas infall and possible circumstellar rotation in R Leo
arXiv:1902.02574 · doi:10.1051/0004-6361/201834840
Abstract
We present new interferometer molecular observations of R Leo taken at 1.2 mm with the Atacama Large Millimeter Array with an angular resolution up to ~0.026 arcsec. These observations permit us to resolve the innermost envelope of this star revealing the existence of a complex structure that involves extended continuum emission and molecular emission showing a non-radial gas velocity distribution. This molecular emission displays prominent red-shifted absorptions located right in front to the star typical of material infall and lateral gas motions compatible with the presence of a torus-like structure.
5 pages, 3 figures, 1 table; accepted for publication in A&A
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