TOWARD UNDERSTANDING THE B[e] PHENOMENON. V. NATURE AND SPECTRAL VARIATIONS OF THE MWC 728 BINARY SYSTEM
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10315910" target="_blank" >RIV/00216208:11320/15:10315910 - isvavai.cz</a>
Alternative codes found
RIV/67985815:_____/15:00449351
Result on the web
<a href="http://dx.doi.org/10.1088/0004-637X/809/2/129" target="_blank" >http://dx.doi.org/10.1088/0004-637X/809/2/129</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/0004-637X/809/2/129" target="_blank" >10.1088/0004-637X/809/2/129</a>
Alternative languages
Result language
angličtina
Original language name
TOWARD UNDERSTANDING THE B[e] PHENOMENON. V. NATURE AND SPECTRAL VARIATIONS OF THE MWC 728 BINARY SYSTEM
Original language description
We report the results of a long-term spectroscopic monitoring of the FS CMa type object MWC 728. We found that it is a binary system with a B5 Ve (T-eff = 14,000 +/- 1000 K) primary and a G8 III type (T-eff +/- 5000 K) secondary. Absorption line positions of the secondary vary, with a semi-amplitude of similar to 20 km s(-1) and a period of 27.5 days. The system's mass function is 2.3 x 10(-2) M-circle dot, and its orbital plane is similar to 13 degrees-15 degrees tilted from the plane of the sky. The primary's upsilon sin i similar to 110 km s(-1), combined with this tilt, implies that it rotates at a nearly breakup velocity. We detected strong variations of the Balmer and He I emission-line profiles on timescales from days to years. This points to avariable stellar wind of the primary in addition to the presence of a circum-primary gaseous disk. The strength of the absorption-line spectrum, along with the optical and near infrared (IR) continuum, suggest that the primary contributes
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astrophysical Journal
ISSN
0004-637X
e-ISSN
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Volume of the periodical
809
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
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UT code for WoS article
000361655100022
EID of the result in the Scopus database
2-s2.0-84939807264