Observations of SiO maser emission from R Leo during its summer 1981 maximum

Details Observations of SiO maser emission from R Leo during its summer 1981 maximum Observations of SiO maser emission from R Leo during its summer 1981 maximum

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982aj.....87.1803c&link_type=abstract

Astronomical Journal, vol. 87, Dec. 1982, p. 1803-1805. Research supported by the Research Corp.

Astronomy and Astrophysics

Astronomy

8

Interstellar Masers, M Stars, Silicon Oxides, Spectral Line Width, Stellar Envelopes, Variable Stars, Emission Spectra, Linear Polarization

Scientific paper

The 7-mm J = 1→0, υ = 1 and υ = 2 SiO maser emission from the Mira variable R Leo has been closely sampled in time near the summer 1981 optical maximum in order to observe possible phase-dependent effects. A significant broadening of both υ = 1 and υ = 2 emission, accompanied by profile changes, was observed between phases 0.95 and 0.98. If these changes are attributed to the expected passage of the shock front, the line formation region can be inferred to be very close to the photosphere of the star, and the radial extent of the line formation region may be crudely estimated.

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