期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 759, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/759/1/L22
关键词
binaries: general; circumstellar matter; stars: AGB and post-AGB; stars: carbon; stars: late-type; stars: winds, outflows
资金
- TIARA in the ASIAA
The binary characteristics of asymptotic giant branch (AGB) stars are imprinted in the asymmetric patterns of their circumstellar envelopes (CSEs). We develop a simple method for constraining the orbital parameters of such binary stars from the characteristics of a spiral-like pattern observed at large distances from the central stars. We place constraints on the properties of AFGL 3068 (i.e., the masses of binary components, the viewing inclination of the orbital plane, as well as the orbital period, velocity, and separation). In particular, the mass of the companion star of AFGL 3068 is estimated to be greater than 2.6 M-circle dot. This method is applicable to other AGB stars, providing a step toward understanding the role binary stars can play in explaining the diverse patterns in observed CSEs.
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