Gas infall and possible circumstellar rotation in R Leonis
Journal article, 2019

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 similar or equal to 0.'' 026. These observations permitted us to resolve the innermost envelope of this star, which revealed 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 immediately in front of the star, which are typical footprints of material infall. This emission also shows lateral gas motions compatible with a torus-like structure.

techniques: high angular resolution

circumstellar matter

techniques: interferometric

stars: individual: R Leo

stars: mass-loss

stars: AGB and post-AGB


J. P. Fonfria

Spanish National Research Council (CSIC)

M. Santander-Garcia


J. Cernicharo

Spanish National Research Council (CSIC)

Luis Velilla Prieto

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Galactic Astrophysics

M. Agundez

Spanish National Research Council (CSIC)

N. Marcelino

Spanish National Research Council (CSIC)

G. Quintana-Lacaci

Spanish National Research Council (CSIC)

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 622 L14

Subject Categories

Astronomy, Astrophysics and Cosmology



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5/9/2019 5