The star Θ1 Ori C1, which is the nearest companion of the principal star Θ1 Ori C, is studied using extensive spectral data. Two radial velocity curves are constructed and solved. One of these describes the motion of the principal star and the other, the motion of the companion C1; in both cases the stars rotate about the center of mass of the C + C1 system. The physical parameters (temperature, acceleration of gravity, mass) and chemical composition of the star C1 are determined. A periodicity of 15.4 days associated with the rotation of the principal star is identified in the variations of the radial velocity.
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References
E. Vitrichenko, The Trapezium of Orion [in Russian], Nauka, Moscow (2004).
H. Lehmann, E. Vitrichenko, V. Bychkov, et al., Astron. Astrophys. 514, 34L (2010).
R. D. Jeffries, Mon. Notic. Roy. Astron. Soc. 376, 1109 (2007).
S. Kraus, Y. Y. Balega, J.-P. Berger, et al., Astron. Astrophys. 466, 649 (2007).
E. B. Frost, S. B. Barret, and O. Struve, Astrophys. J. 64, 1 (1926).
O. Struve and J. Titus, Astrophys. J. 99, 84 (1944).
P. S. Conti, Astrophys. J. 174, L79 (1972).
E. Vitrichenko, Pis’ma v Astron. zh. 28, 370 (2002).
G. Weigelt, Y. Balega, T. Preibisch, et al., Astron. Astrophys. 347, L15 (1999).
E. Vitrichenko, H. Lehmann, V. Klochkova, et al., Astrofizika 53, 306 (2010).
E. Vitrichenko, V. Tsymbal, L. Bychkova, and V. Bychkov, Astrofizika 54, 81 (2011).
O. Stahl, B. Wolf, T. Gang, et al., Astron. Astrophys. 274, L29 (1993).
S. Simon-Diaz, A. Herrero, C. Esteban, and F. Najarro, Astron. Astrophys. 448, 351 (2006).
A. Schwarzenberg-Czerny, Mon. Notic. Roy. Astron. Soc. 241, 153 (1989).
O. Stahl, A. Kaufer, T. Rivinius, et al., Astron. Astrophys. 312, 539 (1996).
O. Stahl, in: L. Kaper and A. Fullerton, eds., Cyclic Variability in Stellar Winds, ESO Workshop (1997), p. 246.
N. R. Walborn and J. S. Nichols, Astrophys. J. 425, L29 (1994).
M. Gagne, J.-P. Caillault, J. R. Stauffer, and J. L. Linsky, Astrophys. J. Lett. 478, L87 (1997).
J. Babel and T. Montmerle, Astrophys. J. 485, L29 (1997).
S. N. Fabrika and V. D. Bychkov, in: Yu. V. Glagolevskij and I. M. Kopylov, eds., Magnetic stars, Proc. Internat. Conf., Nizniy Arkhyz (1988).
O. Stahl, G. Wade, V. Petit, et al., Astron. Astrophys. 487, 323 (2008).
G. A. Wade, A. W. Fullerton, J. F. Donati, et al., Astron. Astrophys. 451 (196 (2006).
F. Pala and S. W. Stahler, Astrophys. J. 255, 772 (1999).
A. M. Polyakov and A. P. Tsivilev, Pis’ma v Astron. zh. 33, 39 (2007).
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Translated from Astrofizika, Vol. 55, No. 2, pp. 225-233 (May 2012).
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Vitrichenko, E.A., Bondar, N.I., Bychkova, L. et al. The companion C1 in the Θ1 Ori C system. Astrophysics 55, 199–207 (2012). https://doi.org/10.1007/s10511-012-9228-7
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DOI: https://doi.org/10.1007/s10511-012-9228-7