Long-term variations of kappa Dra (Saad+, 2004)

Details Long-term variations of kappa Dra (Saad+, 2004) Long-term variations of kappa Dra (Saad+, 2004)

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ycat..34190607s&link_type=abstract

VizieR On-line Data Catalog: J/A+A/419/607. Originally published in: 2004A&A...419..607S

Physics

Stars: Be, Spectroscopy, Equivalent Widths

Scientific paper

A summary of results of spectroscopic monitoring of the bright Be star kappa Dra carried out at the Ondrejov Observatory between 1990 and 2004 is presented. To investigate long-term variations of Kappa Dra, we focused on Hα, H{beta}, H{gamma}, H{delta}, SiII 6347{AA}, SiII 6371{AA}, HeI 6678{AA}, and FeII 6456{AA} lines. We measured equivalent widths {W}, peak intensities of the double emission lines, and the central intensity of the absorption reversals relative to the adjacent continuum (IV, IR, and Ic, respectively), and also the peak separation between violet and red peaks (Deltanup). Note that {W} is taken with a negative sign for the emission line profile. Only {W}, and Ic were measured, of course, for the absorption lines of {HeI} and {SiII}. All measurements are collected together with heliocentric Julian dates of mid-exposures (HJDs) in Tables 2, 3 and 4.
(3 data files).

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