Time Variation of SiO(v = 1, J = 2-1) Masers of Long Period Variables

Details Time Variation of SiO(v = 1, J = 2-1) Masers of Long Period Variables Time Variation of SiO(v = 1, J = 2-1) Masers of Long Period Variables

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jkas...27..133l&link_type=abstract

Journal of the Korean Astronomical Society, vol. 27, no. 2, p. 133-146

Astronomy and Astrophysics

Astronomy

1

Long Period Variables, Sio Maser Lines, Pumping Mechanism

Scientific paper

We have detected a SiO maser line(v = 1, J = 2-1) for 15 stars out of about 80 long period variables in the wide range of period. No new sources are detected; all detected sources are variables with period longer than 300 days; no evidence is found that the dust grains in the outer envelope have influenced on this line. The time variation of this maser line for 7 stars, T Cep, mu Cep, U Her, R Leo, R Lmi, U Ori, and R Ser is observed and compared with optical light curve at the same epoch of maser observation. No universal relation between the time variation and the optical light curve is found. It implies that the radiation from a central star does not much play an important role for the direct pumping of the SiO maser line.

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