Spectroscopy of Be Stars Kappa Draconis and 60 Cygnus

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

New spectroscopic data for Be stars κ Dra and 60 Cyg were collected and analyzed. For purposes of clarifying data, by removing water lines, a library of telluric calibration files, for use at Ritter Observatory, were created. Of special note is the loss of emission by the star 60 Cyg in the month of June 2001. Equivalent width of the Hα line, radial velocities, delta V, V/R quantities and polarization data were analyzed to reveal new periods for each star. While the periods are still in preliminary stages, the periods seem very promising. Most striking is an apparent period of about 2000 days in the equivalent width of κ Dra. Data is also suggestive that the 61.55-day period of κ Dra may not be due to binary motion as was previously reported. Strong evidence for a correlation between the equivalent width of the Hα line and the polarization is found. Possible implications on the evolution of the star are discussed.

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