CORRELATED LONG-TERM LIGHT, COLOR AND SPECTRAL VARIATIONS OF THE BE-STAR-KAPPA-DRA

Authors
JUZA K HARMANEC P BOZIC H PAVLOVSKI K ZIZNOVSKY J TARASOV AE HORN J KOUBSKY P
Citation
K. Juza et al., CORRELATED LONG-TERM LIGHT, COLOR AND SPECTRAL VARIATIONS OF THE BE-STAR-KAPPA-DRA, Astronomy & Astrophysics. Supplement series, 107(2), 1994, pp. 403-411
Citations number
51
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy & Astrophysics. Supplement series → ACNP
ISSN journal
03650138
Volume
107
Issue
2
Year of publication
1994
Pages
403 - 411
Database
ISI
SICI code
0365-0138(1994)107:2<403:CLLCAS>2.0.ZU;2-L
Abstract
Intensity of the Balmer emission lines of kappa Dra, documented by spe ctral records from the past 100 years, was found to vary with a period of 8406 d (23(y)01). Optical brightness and continuum polarimetry see m to vary with the same period. Polarimetric changes are in phase with the emission strength. The brightness of the object attains maximum d uring the rise of emission. Then it declines to a local minimum which coincides with the maximum strength of the Palmer emission. Possible q ualitative interpretation of these facts is briefly outlined