Gas infall and possible circumstellar rotation in R Leo

(2) Observatorio Astron\'omico Nacional; (3) Dept. of Space; Astronomy; Chalmers University of Technology; CSIC; Earth; Environment; G. Quintana-Lacaci (1) ((1) Instituto de F\'isica Fundamental; J. Cernicharo (1); J. P. Fonfr\'ia (1)

arxiv: 1902.02574 · v1 · pith:BR2AKVD6new · submitted 2019-02-07 · 🌌 astro-ph.SR · astro-ph.GA

Gas infall and possible circumstellar rotation in R Leo

J. P. Fonfr\'ia (1) , M. Santander-Garc\'ia (2) , J. Cernicharo (1) , L. Velilla-Prieto (3) , M. Ag\'undez (1) , N. Marcelino (1) , G. Quintana-Lacaci (1) ((1) Instituto de F\'isica Fundamental , CSIC

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Madrid Spain (2) Observatorio Astron\'omico Nacional OAN-IGN (3) Dept. of Space Earth Environment Astronomy Plasma Physics Division Chalmers University of Technology Onsala Space Observatory Onsala Sweden)

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keywords emissionmolecularinfallobservationsstarstructureabsorptionsangular

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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.

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Gas infall and possible circumstellar rotation in R Leo

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