Dwarf novae

http://astrothesaurus.org/uat/418

alt label
Dwarf nova
U Geminorum-type variable stars
dcterms modified equal to or less than 2020-11-05T15:43:28.710Zequal to or more than 2020-11-05T15:43:28.710Z
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http://astrothesaurus.org/uat/1127 original
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418 original
definition A class of novae and cataclysmic variables that have multiple observed eruptions. Their prototype is U Geminorum star. Optically, dwarf nova eruptions have amplitudes of 2-6 mag in V, a duration of a few to 20 days and a recurrence time-scale of weeks to years. Dwarf novae are thought to be semidetached binary stars consisting of a white dwarf primary accreting via Roche lobe overflow from a companion which is usually a late-type, generally main-sequence star. DN outbursts are usually attributed to the release of gravitational energy resulting from an instability in the accretion disk or by sudden mass transfers through the disk.
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http://astrothesaurus.org/uat/1645 original
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418 original
http://astrothesaurus.org/uat/1672 original
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418 original
http://astrothesaurus.org/uat/1732 original
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418 original
http://astrothesaurus.org/uat/1809 original
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418 original
http://astrothesaurus.org/uat/1836 original
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418 original
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contributor AAS_Frey.Katie_Admin original