Molecular emission from GG Carinae's circumbinary disk

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F13%3A00399497" target="_blank" >RIV/67985815:_____/13:00399497 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1051/0004-6361/201220442" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201220442</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201220442" target="_blank" >10.1051/0004-6361/201220442</a>

Result language
angličtina
Original language name
Molecular emission from GG Carinae's circumbinary disk
Original language description
We aim at studying the kinematics and origin of the disk in the eccentric binary system GG Car, whose primary component is proposed to be a B[e] supergiant. We find that the CO gas is located in a ring surrounding the eccentric binary system, and its kinematics agrees with Keplerian rotation with a velocity, projected to the line of sight, of 80 +/- 1 km s(-1). The CO ring has a column density of (5 +/- 3) x 10(21) cm(-2) and a temperature of 3200 +/- 500 K. In addition, the material is chemically enriched in C-13, which agrees with the primary component being slightly evolved off the main sequence. We discuss two possible scenarios for the origin of the circumbinary disk: (i) non-conservative Roche lobe overflow; and (ii) the possibility that the progenitor of the primary component could have been a classical Be star. Neither can be firmly excluded, but for Roche lobe overflow to occur, a combination of stellar and orbital parameter extrema would be required.
Czech name
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Czech description
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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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Project
<a href="/en/project/GAP209%2F11%2F1198" target="_blank" >GAP209/11/1198: Circumstellar environment of evolved hot stars</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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