Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541810p&link_type=abstract
American Astronomical Society, AAS Meeting #215, #418.10; Bulletin of the American Astronomical Society, Vol. 42, p.276
Other
1
Scientific paper
Maser spectra of the long period variable star R Cassiopeia have been observed over approximately four stellar periods in the silicon monoxide v = 1, J = 1 - 0 transition. The linear polarization characteristics of the spectra have been determined. The lifetimes and beginning and ending phases of nineteen maser features have been extracted from Gaussian fits to the polarized spectra. It has been proposed that the maser emissions of long period variables are affected by the passage of a shock wave through the circumstellar region in which the masers originate. The proposed shock passage produces a fading of the emission by phase 0.4. The results of the Gaussian fits indicate that six features went out of existence between phases 0.3 and 0.4. In no other phase range did more than three features go out of existence. This research has been supported by NSF Grant AST-0606764.
McIntosh Gordon C.
Patriat Remi
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