Gas infall and possible circumstellar rotation in R Leonis
Artikel i vetenskaplig tidskrift, 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

Författare

J. P. Fonfria

Consejo Superior de Investigaciones Científicas

M. Santander-Garcia

IGN

J. Cernicharo

Consejo Superior de Investigaciones Científicas

Luis Velilla Prieto

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Galaktisk astrofysik

M. Agundez

Consejo Superior de Investigaciones Científicas

N. Marcelino

Consejo Superior de Investigaciones Científicas

G. Quintana-Lacaci

Consejo Superior de Investigaciones Científicas

Astronomy and Astrophysics

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

Vol. 622 L14

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.1051/0004-6361/201834840

Mer information

Senast uppdaterat

2019-05-09