Spectrum Disentangling and Orbital Solution for κ Dra

Details Spectrum Disentangling and Orbital Solution for κ Dra Spectrum Disentangling and Orbital Solution for κ Dra

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ap%26ss.296..173s&link_type=abstract

Astrophysics and Space Science, Volume 296, Issue 1-4, pp. 173-177

Astronomy and Astrophysics

Astrophysics

4

Scientific paper

Based on a new set of electronic spectra in a relatively wide spectral range (3500 8300 Å) and using the methods of spectrum disentangling (code KOREL) and solution of RV curves (code FOTEL), we determined new orbital elements of the binary star κ Dra. The solution of the radial velocity curves for Balmer and some other strong metallic lines suggested a circular orbit and led to the following orbital elements: period P = 61.555 ± 0.029 days, epoch of periastron passage T periast = 49980.22 ± 0.59, RV semi-amplitude K 1 = 6.81 ± 0.24 km s-1, and a mass function of f(m) = 0.002 M &sun;. Lines of the secondary were not detected. In addition, moving absorption bumps in the violet peaks of Hα and Hβ lines were found to be phase-locked with the orbital period. Their presence suggests some kind of interaction between the binary components.

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