Spectroscopic Orbit of the Eclipsing Binary AI Draconis |
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| Authors: | B Khalesseh |
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| Institution: | (1) Department of Physics, University of Ferdowsi, Mashhad, 91735-654, Islamic Republic of IRAN |
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| Abstract: | New radial velocity measurements of the Algol-type eclipsing binary AI Dra, based on Reticon observations, are presented.
The velocity measures themselves are based on fitting theoretical profiles, generated by a physical model of the binary, to
the observed cross-correlation function (ccf). Such profiles match this function very well, much better in fact that Gaussian
profiles which are generally used. Measuring the ccf's with Gaussian profiles yields following results: mp sin3 i=2.55± 0.05m⊙, ms sin3 i = 1.14 ± 0.03m⊙, (ap + as) sin i=7.34 ±0.05R⊙, and mp/ms =2.23± 0.05. Where as measuring the ccf's with theoretical profiles yields a mass ratio of 2.33 and following results:
mp sin3 i=2.84± 0.05m⊙, ms sin3 i=1.22 ± 0.03m⊙, (ap +as) sin i=7.56± 0.05R⊙.
The system comprising a semi-detached configuration. From the solution of a previously published light curved and combining
it's results with the spectroscopic orbit, one can lead to the following physical parameters: mp =2.99m⊙, ms =1.28m⊙, > Tp < =9600 K, > Ts < =5400 K, > Rp < =2.35R⊙, > Rs < =2.12R⊙. The system comprising an AO primary and a secondary of G2 spectral type.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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