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Abstrakty
We present the first spectroscopic study of an eclipsing system GT UMa. Our spectra show that the main visual component A is a triple-lined star, which consists of a close eclipsing pair and a farther third component. Radial velocity measurements show evidence of reflex motion. We used Hipparcos and our own R-band light curves for the analysis. These results enabled us to calculate absolute parameters of the eclipsing binary system: 1.37 M⊙ and 1.31 M⊙ and corresponding radii 2.11 R⊙ and 1.63 R⊙. Both eclipsing components are evolved. The orbital period of the eclipsing subsystem is 1.2 d and the semi-major axis - 6.5 R⊙. The wide orbit has low radial velocity amplitude and its parameters are difficult to determine. We obtained a preliminary solution which must be confirmed with future observations. The preliminary period of the wide orbit is 394 d and the lower limit for the semi-major axis - 174 R⊙ (0.81 a.u.). We estimated the mass of the third body to about 1.1 M⊙. Additionally, we investigated the visual companion B. We obtained spectra of this star and measured the radial velocity which is very close to the one of the component A. The proper motions and the parallax are also similar. These are strong arguments that component B is gravitationally bound with the main triple system A.
Czasopismo
Rocznik
Tom
Strony
141--158
Opis fizyczny
Bibliogr. 33 poz., rys., tab., wykr.
Twórcy
autor
- Astronomical Observatory Institute, Faculty of Physics, A. Mickiewicz University, ul. Słoneczna 36, 60-286 Poznań, Poland
autor
- Centre for Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziądzka 5, PL-87-100 Toruń, Polan
autor
- Astronomical Observatory Institute, Faculty of Physics, A. Mickiewicz University, ul. Słoneczna 36, 60-286 Poznań, Poland
autor
- Astronomical Observatory Institute, Faculty of Physics, A. Mickiewicz University, ul. Słoneczna 36, 60-286 Poznań, Poland
autor
- Institute of Astronomy, Bulgarian Academy of Sciences, P.O.Box 136, BG-4700 Smolyan, Bulgaria
autor
- Astronomical Observatory Institute, Faculty of Physics, A. Mickiewicz University, ul. Słoneczna 36, 60-286 Poznań, Poland
Bibliografia
- Ammons, S.M., Robinson, S.E., Strader, J., Laughlin, G., Fischer, D., and Wolf, A. 2006, ApJ, 638, 1004.
- Asplund, M., Grevesse, N., Sauval, A.J., and Scott, P. 2009, Ann. Rev. Astron. Astrophys., 47, 481.
- Bate, M.R. 2004, Astrophysics and Space Science, 292, 297.
- Blanco-Cuaresma, S., Soubiran, C., Heiter, U., and Jofré, P. 2014, A&A, 569, A111.
- Bonev, T., et al. 2017, Bulgarian Astronomical Journal, 26, 67.
- Brown, A.G.A., et al. 2018, arXiv:1804.09365.
- Dimitrov, W., et al. 2014, A&A, 564, A26.
- Dimitrov, W., et al. 2015, A&A, 575, A101.
- Dimitrov, W., Lehmann, H., Kamiński, K., Kamińska, M.K., Zgórz, M., and Gibowski, M. 2017, MNRAS, 466, 2.
- Dommanget, J., and Nys, O. 1994, Communications de l’Observatoire Royal de Belgique, 115, 1.
- Gaia Collaboration Brown, A.G.A., et al. 2016, A&A, 595, 2.
- Gray, D.F. 2005, in: “The Observation and Analysis of Stellar Photospheres”, Cambridge University Press, 2005.
- Kochanek, C.S., et al. 2017, PASP, 129, 104502.
- Kupka, F., and Dubernet, M.-L., VAMDC Collaboration 2011, Baltic Astronomy, 20, 503.
- Kurucz, R.L. 2005, Memorie della Societa Astronomica Italiana Supplementi, 8, 14.
- Lindegren, L., et al. 2016, A&A, 595, 4.
- Machida, M.N., Tomisaka, K., Matsumoto, T., and Inutsuka, S. 2008, ApJ, 677, 327.
- Mason, B.D., Wycoff, G.L., Hartkopf, W.I., Douglass, G.G., and Worley, C.E. 2001, AJ, 122, 3466.
- Mikuz, H., Dintinjana, B., Zwitter, T., and Munari, U. 2004, IBVS, 5530.
- Pineda, J.E., et al. 2015, Nature, 518, 213.
- Prša, A., and Zwitter, T. 2005, ApJ, 628, 426.
- Pych, W. 2004, PASP, 116, 148.
- Reipurth, B. 2017, Memorie della Societa Astronomica Italiana, 88, 611.
- Schwarzenberg-Czerny, A. 1996, ApJ, 460, L107.
- Shapee, B., J., et al. 2014, ApJ, 788, 48S.
- Smalley, B. 2005, Memorie della Societa Astronomica Italiana Supplementi, 8, 130.
- Tholine, J.E. 2002, Ann. Rev. Astron. Astrophys., 40, 349.
- Tobin, J.J., et al. 2016, Nature, 538, 483.
- Tokovinin, A. 2014, AJ, 147, 4.
- Wilson, R.E., and Devinney, E.J. 1971, ApJ, 166, 605.
- van Hamme, W. 1993, AJ, 106, 2096.
- Zasche, P., Wolf, M., Hartkopf, W.I., Svoboda, P., Uhlar, R., Liakos, A., and Gazeas, K. 2009, AJ, 138, 664.
- Zinnecker, H. 2002, ASP Conf. Ser., 285, 131.
Uwagi
Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-73a77818-abad-4ac9-84ae-8b989a1ae8db