Peculiar OH variation of R Leo

Details Peculiar OH variation of R Leo Peculiar OH variation of R Leo

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...152...85l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 152, no. 1, Nov. 1985, p. 85-88.

Astronomy and Astrophysics

Astrophysics

14

Hydroxyl Emission, Interstellar Masers, Stellar Evolution, Stellar Spectrophotometry, Variable Stars, Infrared Spectra, Light Curve, Mira Variables, Radiant Flux Density, Spectral Energy Distribution

Scientific paper

An important change has been observed since 1981 in the 18 cm OH maser emission of the Mira star R Leo. The authors report here their detailed observations, completed with the available data which can help in the understanding of this evolution. The nature of the phenomenon is discussed, and it is shown that its cause is probably a modification of the pump mechanism. Because the OH maser of the Mira star U Ori is already known to be singular, a comparison is being made between the two stars. The meaning of the event in Mira stars evolution is studied.

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