Cataclysmic variable stars

GPTKB entity

Predicate	Object
gptkbp:instanceOf	gptkb:binary_star_system gptkb:variable_star
gptkbp:accretionDisk	present in most systems
gptkbp:accretionFrom	donor star to white dwarf
gptkbp:conducts	dwarf nova outburst nova outburst nova-like outburst
gptkbp:discoveredBy	gptkb:John_Russell_Hind
gptkbp:distance	hundreds to thousands of light-years
gptkbp:donorStarType	gptkb:stellar_classification gptkb:red_supergiant
gptkbp:emits	gptkb:X-rays ultraviolet light infrared light optical light
gptkbp:example	gptkb:V1500_Cygni AM Herculis SS Cygni U Geminorum Z Camelopardalis
gptkbp:firstDescribed	gptkb:19th_century
gptkbp:foundIn	gptkb:Milky_Way
gptkbp:hasComponent	gptkb:white_dwarf donor star
gptkbp:magneticFieldStrength	moderate in intermediate polars strong in polars weak in non-magnetic systems
gptkbp:massTransfer	gptkb:Roche_lobe_overflow
gptkbp:observedBy	space telescopes ground-based telescopes
gptkbp:outburstAmplitude	2 to 6 magnitudes
gptkbp:outburstCause	instabilities in accretion disk
gptkbp:outburstDuration	days to weeks
gptkbp:periodRange	1.3 hours to 10 hours
gptkbp:powerSource	accretion
gptkbp:spectralType	varied
gptkbp:studiedIn	astrophysics
gptkbp:subclassOf	gptkb:nun gptkb:white_dwarf intermediate polars polars nova-like variable
gptkbp:variant	irregular periodic eruptive
gptkbp:whiteDwarfType	degenerate star
gptkbp:bfsParent	gptkb:Magnetic_Braking
gptkbp:bfsLayer	8
https://www.w3.org/2000/01/rdf-schema#label	Cataclysmic variable stars