Dwarf Novae
Dwarf novae undergo multiple eruptions in which their brightness increases by about 2 - 5 magnitudes. Each eruption lasts between 2 and 20 days with the nova duration related to the interval between outbursts.
Dwarf novae (DN) are a class of and that have multiple observed eruptions ranging in brightness from 2 to 5 magnitudes. Outburst intervals for each object are quasi-periodic, but within the DN family, intervals can range from days to decades.
Dwarf Novae are cataclysmic variables -- variable stars -- whose brightness often changes "cataclysmically" over short periods of time. They were first discovered by the English Astronomer J.R.
Dwarf Novae
These are intrinsically faint stars that exhibit a sudden increase in brightness by 2 to 5 magnitudes over a few days with intervals of weeks or months between outbursts.
Dwarf Nova
A star that undergoes novalike explosions every few days or weeks; believed to be associated with mass transfer onto a white dwarf in a binary system.
Dynamo Effect ...
Dwarf Nova
(a) A short-period binary system consisting of a hot white dwarf (or a hot blue sdBe subdwarf) and a much cooler and slightly more massive late-type main-sequence companion which fills its Roche lobe and is ejecting mass onto the white ...
Dwarf novae are a different phenomenon, and are typically hundreds of times fainter. These are due to instabilities in accretion disks.
Dwarf novae are double stars involving a white dwarf star in which matter transfer between the component gives rise to regular outbursts. There are three types of dwarf nova: ...
dwarf nova - (n.)
A close binary-star system containing a white dwarf; material from the companion star falls onto the other at sporadic intervals, creating brief nuclear outbursts.
dynamo - (n.) ...
A type of dwarf nova (q.v.). All U Geminorum stars are binaries containing a white dwarf and a red dwarf with total masses of roughly 1-2 M and with periods of less than 12 hours (period of U Gem, 1.5 × 104 seconds). About 150 are known. [H76] ...
[4.2] NOVAS, DWARF NOVAS, & TYPE I SUPERNOVAS
[4.3] GAMMA-RAY BURSTERS
[4.4] BROWN DWARFS ...
dwarf novae (NASA Thesaurus) Short period binary systems in which a red quasi-main sequence star fills its Roche lobe and transfers matter, via an accretion disk, onto a white dwarf.
U GEMINORUM STARS - Type of variable star displaying sudden and unpredictable increases in brightness, sometimes referred to as dwarf novae.
Astronomers have also observed dwarf novae, which have smaller, more frequent luminosity peaks than classical novae. These are thought to not be caused by fusion but rather by the release of gravitational potential energy during accretion.
Most novas probably repeat their outbursts, the dwarf novas every few months, the recurring novas every few years or decades, and the standard novas over thousands of years.
This is perhaps always the case with dwarf novas, which erupt repeatedly at regular intervals of a few to hundreds of days.
Eclipsing variables of this type may develop into eruptive "dwarf novae" similar to U Geminorum and SS Cygni, ...
 See also: Dwarf, Star, Light, Time, Period
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