SU Ursae Majoris - The perfect prototype of SU UMa subclass of dwarf novae

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115508· OSTI ID:6595346

Udalski, A ^[1]

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1. York Univ., Toronto (Canada)

Photometric observations of the April 1989 superoutburst of SU UMa are presented. The periodic light variation, the superhumps, were discovered, proving that SU UMa is indeed a typical star of the SU UMa-type of dwarf novae and a good prototype of the class. The superhump period is equal to 113.4 min and is about 3 percernt longer than the orbit alone. It decreases during the superoutburst with the rate dP/P about 0.00006. Photometry obtained during the late stages of the superoutburst suggests the presence of so-called late superhumps. The superhump profile has an evident, two-component structure which can be explained in the simplest way by the mass-transfer model. 27 refs.

• OSTI ID: 6595346
• Journal Information: Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 100; ISSN 0004-6256; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BINARY STARS
CLASSIFICATION
DWARF STARS
ERUPTIVE VARIABLE STARS
MASS TRANSFER
NOVAE
PHOTOMETRY
STARS
STELLAR ACTIVITY
STELLAR FLARES
VARIABLE STARS
VARIATIONS