Multicolor photometry of the dwarf nova HS 0218 + 3229

• Published in: Astrophysics 2012-06, Vol.55 (2), p.208-225
• Main Authors: Golysheva, P. Yu, Antipin, S. V., Zharova, A. V., Katysheva, N. A., Chochol, D., Shugarov, S. Yu
• Format: Article
• Language: English
• Subjects: Astronomy; Astrophysics; Astrophysics and Astroparticles; Astrophysics and Cosmology; Bands; Binary systems; Charge coupled devices; Color; Dwarf stars; Nova; Observations and Techniques; Orbitals; Outbursts; Photometry; Physics; Physics and Astronomy; Space Exploration and Astronautics; Space Sciences (including Extraterrestrial Physics; Supernovae
• ISSN: 0571-7256; 1573-8191
• DOI: 10.1007/s10511-012-9229-6

This is a study of the cataclysmic variable HS 0218 + 3229. An analysis of 2000 CCD and 200 photographic observations of this close binary system from 1963-2010 reveals two outbursts (in 1980 and 2007) with amplitudes of about 4 m in the pg and V bands. This variable has been classified as a UGSS-type dwarf nova with rare, symmetric outbursts, which are typical of “inside-out” outbursts. The orbital period is found with greater accuracy to be 0 d .2973559, during which a double wave is observed owing to the ellipsoidal shape of the secondary component— a class K5V star. The phase light curves and color index curves are introduced and explained, and an interpretation of the position of the object in two-color diagrams is provided. A difference in the orbital light curves before and after the outbursts is detected, and some physical characteristics of this close binary system are determined.