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The enhanced spectrum of the symbiotic variable star CH Cygni on November 2, 2006

Title
The enhanced spectrum of the symbiotic variable star CH Cygni on November 2, 2006
Authors
Yoo K.H.
Ewha Authors
유계화
SCOPUS Author ID
유계화scopus
Issue Date
2010
Journal Title
New Astronomy
ISSN
1384-1076JCR Link
Citation
vol. 15, no. 2, pp. 215 - 226
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The symbiotic variable star CH Cygni went on the deepest minimum phase in December 2006. A high-resolution spectrum of CH Cygni obtained at the Bohyunsan Optical Astronomy Observatory (BOAO) on November 2, 2006, is reported. The spectrum of CH Cygni obtained at the BOAO was calibrated on a scale of an absolute-flux density. Emission lines of H I, [O III], [N II], and [S II] were strong, with several components, and Ca II, H, and K lines had P-Cygni profiles. Removal of the spectrum of the underlying M-type star from the CH Cygni spectrum was completed to obtain the true emission profiles. The radial velocities of all emission and absorption lines were measured. Some of the observed lines were also deconvoluted using multi-Gaussian functions to find the relationship between line shapes and the corresponding sources of these lines. The results obtained are discussed in terms of an accretion disk around the hot star, and in non-spherically extended nebular regions. © 2009 Elsevier B.V. All rights reserved.
DOI
10.1016/j.newast.2009.07.007
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사범대학 > 과학교육과 > Journal papers
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