prikaz prve stranice dokumenta Stellar modelling of Spica, a high-mass spectroscopic binary with a beta Cep variable primary component
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Scientific paper - Original scientific paper
Stellar modelling of Spica, a high-mass spectroscopic binary with a beta Cep variable primary component
Monthly Notices of the Royal Astronomical Society, 458 (2016), 2; 1964-1976. https://doi.org/10.1093/mnras/stw255
Tkachenko, A.; Matthews, J.M.; Aerts, C.; Pavlovski, Krešimir; Papics, P.I.; Zwintz, K.; Cameron, C.; Walker, G.A.H.; Kuschnig, R.; Degroote, P.; Debosscher, J.; Moravveji, E.; Kolbas, Vladimir; Guenther, D.B.; Moffat, A.F.J.; Rowe, J.F.; Rucinski, S.M.; Sasselov, D.; Weiss, W.W. More authors...

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Tkachenko, A., Matthews, J., Aerts, C., Pavlovski, K., Papics, P., Zwintz, K. ... Weiss, W. (2016). Stellar modelling of Spica, a high-mass spectroscopic binary with a beta Cep variable primary component. Monthly Notices of the Royal Astronomical Society, 458. (2), 1964-1976. doi: 10.1093/mnras/stw255

Tkachenko, A., et al. "Stellar modelling of Spica, a high-mass spectroscopic binary with a beta Cep variable primary component." Monthly Notices of the Royal Astronomical Society, vol. 458, no. 2, 2016, pp. 1964-1976. https://doi.org/10.1093/mnras/stw255

Tkachenko, A., J.M. Matthews, C. Aerts, Krešimir Pavlovski, P.I. Papics, K. Zwintz, C. Cameron, et al. "Stellar modelling of Spica, a high-mass spectroscopic binary with a beta Cep variable primary component." Monthly Notices of the Royal Astronomical Society 458, no. 2 (2016): 1964-1976. https://doi.org/10.1093/mnras/stw255

Tkachenko, A., et al. (2016) 'Stellar modelling of Spica, a high-mass spectroscopic binary with a beta Cep variable primary component', Monthly Notices of the Royal Astronomical Society, 458(2), pp. 1964-1976. doi: 10.1093/mnras/stw255

Tkachenko A, Matthews J, Aerts C, Pavlovski K, Papics P, Zwintz K, and sur.. Stellar modelling of Spica, a high-mass spectroscopic binary with a beta Cep variable primary component. Monthly Notices of the Royal Astronomical Society [Internet]. 2016 [cited 2024 December 24];458(2):1964-1976. doi: 10.1093/mnras/stw255

A. Tkachenko, et al., "Stellar modelling of Spica, a high-mass spectroscopic binary with a beta Cep variable primary component", Monthly Notices of the Royal Astronomical Society, vol. 458, no. 2, pp. 1964-1976, 2016. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:585215. [Accessed: 24 December 2024]

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Title (english)Stellar modelling of Spica, a high-mass spectroscopic binary with a beta Cep variable primary component
AuthorA. Tkachenko
AuthorJ.M. Matthews
AuthorC. Aerts
AuthorKrešimir Pavlovski
AuthorP.I. Papics
AuthorK. Zwintz
AuthorC. Cameron
AuthorG.A.H. Walker
AuthorR. Kuschnig
AuthorP. Degroote
AuthorJ. Debosscher
AuthorE. Moravveji
AuthorVladimir Kolbas
AuthorD.B. Guenther
AuthorA.F.J. Moffat
AuthorJ.F. Rowe
AuthorS.M. Rucinski
AuthorD. Sasselov
AuthorW.W. Weiss
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Astronomy and Astrophysics
Abstract (english)
Binary stars provide a valuable test of stellar structure and evolution, because the masses of the individual stellar components can be derived with high accuracy and in a model-independent way. In this work, we study Spica, an eccentric double-lined spectroscopic binary system with a beta Cep type variable primary component. We use state-of-the-art modelling tools to determine accurate orbital elements of the binary system and atmospheric parameters of both stellar components. We interpret the short-period variability intrinsic to the primary component, detected on top of the orbital motion both in the photometric and spectroscopic data. The non-local thermodynamic equilibrium based spectrum analysis reveals two stars of similar atmospheric chemical composition consistent with the present-day cosmic abundance standard. The masses and radii of the stars are found to be 11.43±1.15 Msun and 7.21±0.75 Msun, and 7.47±0.54 Rsun and 3.74±0.53 Rsun for the primary and secondary, respectively. We find the primary component to pulsate in three independent modes, of which one is identified as a radial mode, while the two others are found to be non-radial, low degree l modes. The frequency of one of these modes is an exact multiple of the orbital frequency, and the l=m=2 mode identification suggests a tidal nature for this particular mode. We find a very good agreement between the derived dynamical and evolutionary masses for the Spica system to within the observational errors of the measured masses. The age of the system is estimated to be 12.5±1 Myr.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titleMonthly Notices of the Royal Astronomical Society
Numberingvol. 458, no. 2, pp. 1964-1976
p-ISSN0035-8711
e-ISSN1365-2966
DOIhttps://doi.org/10.1093/mnras/stw255
URN:NBNurn:nbn:hr:217:585215
Publication2016
ProjectNumber: IP-2014-09-8656
Title (croatian): Zvijezde i prašina: struktura, sastav i interakcija
Acronym: STARDUST
Leader: Krešimir Pavlovski
Jurisdiction: Croatia
Funding stream: IP
Document URLhttps://academic.oup.com/mnras/article/458/2/1964/2588998
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Public note© 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Received: 29 June 2015. Revision Received: 27 January 2016. Accepted: 28 January 2016. Published: 02 February 2016.
Created on2020-02-09 15:18:26