Stellar Wind Accretion and Raman O VI Spectroscopy of the Symbiotic Star AG Draconis
Abstract Raman scattered O VI features at 6825 Å and 7082 Å found in symbiotic stars are important spectroscopic tools to probe the mass transfer process. Adopting a Monte Carlo approach, we perform a profile analysis of Raman O VI features of the yellow SySt AG Draconis and make a comparison with t...
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Published in | Proceedings of the International Astronomical Union Vol. 14; no. S343; pp. 449 - 451 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Cambridge
Cambridge University Press
01.08.2018
|
Subjects | |
Online Access | Get full text |
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Summary: | Abstract
Raman scattered O VI features at 6825 Å and 7082 Å found in symbiotic stars are important spectroscopic tools to probe the mass transfer process. Adopting a Monte Carlo approach, we perform a profile analysis of Raman O VI features of the yellow SySt AG Draconis and make a comparison with the spectrum obtained with CFHT. It is assumed that the accretion flow is convergent on the entering side with enhanced O VI emission and the flux ratio
F
(1032)/
F
(1038)∼1, whereas on the opposite side the flow is divergent with low O VI emission and
F
(1032/
F
(1038)∼2. Our best fit to the spectrum is obtained from our model with a mass-loss rate of the giant ∼4 × 10
−7
M
⊙
yr
−1
. A slight red wing excess in the spectrum suggests the presence of bipolar neutral components receding in the directions perpendicular to the binary orbital plane with a speed ∼70km s
−1 |
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ISSN: | 1743-9213 1743-9221 |
DOI: | 10.1017/S1743921318006130 |