Journal
ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS
Volume 28, Issue 5, Pages 324-334Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/1.1476981
Keywords
stars; peculiarity; radial-velocity determination
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The radial velocities of the star circle minus(1) Ori C were measured from IUE spectra and are compared with puhlished data. Two companions (C1 and C2) are assumed to be 1)resent. The probable periods for companion C1 can be estimated from the formula P = 729.6/L days, where L < 13 is an integer. Radial-velocity curves were constructed for L = 11 and 12. The orbit turned out to be elliptical. At L = 11, the orbital elements are P = 66.3(1) days, gamma = 10.0(2) km s(-1), K = 6.1(1) km s(-1), omega = -2.88(5) rad, e = 0.43(6), and Ep = JD 24490:14.7(4). The errors in the last decimal digit are given in parentheses. Companion C2 was detected by temporal variations in the gamma velocity of companion CI. Its orbit is assumed to be circular with the following elements: P = 120(6) yr, gamma = 22(1) km s(-1), K = 13('2) km s(-1), and EP = 1911(3) yr. (C) 2002 MAIK Nauka/Interperiodica.
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