Cataclysmic variables (also U Geminorum Stars) are a class of binary stars containing a white dwarf and a companion star.
Cataclysmic Variables
Introduction to Cataclysmic Variables (CVs)
Cataclysmic variables (CVs) are binary star systems which have a white dwarf and a normal star companion.
Definition: Cataclysmic Variable (CV): Binary star systems with one white dwarf star and one normal star, in close orbit about each other. Material from the normal star falls onto the white dwarf, creating a burst of X-rays.
cataclysmic variable
a close binary system which includes a white dwarf accreting matter from a less massive companion
catadioptric telescope ...
Cataclysmic Variable
A type of variable including flare stars and novae (common, recurrent, and dwarf), ...
Cataclysmic Variable, Classical Nova, Dwarf Nova, Nova-Like Variable, Recurrent Nova, Supernova ...
Cataclysmic variables always have a binary companion, and do not pulsate via the same mechanism as the other variable stars so-far discussed. They draw matter from their companion star, as shown in the diagram above.
see Cataclysmic Variable. [H76]
ESA
European Space Agency [LLM96]
Escape Velocity ...
Non-magnetic cataclysmic variables which have been observed in outburst at least once are known as novae. They occur suddenly and unexpectedly, showing a dramatic rise in luminosity (up to 19 magnitudes!) over a period of only hours or days.
Eruptive or Cataclysmic Variables
Eruptive variables can exhibit significant and rapid changes in their luminosity due to violent outbursts caused by processes within the star. There is a wide variety of eruptive or cataclysmic variables.
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.
Main article: Pulsating white dwarf See also: Cataclysmic variables
Early calculations suggested that there might be white dwarfs whose luminosity varied with a period of around 10 seconds, but searches in the 1960s failed to observe this., § 7.
The planet is the first to be found around a pair of stars this close together, and the system as a whole is a rare example of a binary system prior to entering the cataclysmic variable phase.
The most notable star in the constellation is probably T Pyxidis, a cataclysmic variable star or recurrent nova. The star is composed of a white dwarf and a companion star, lying approximately 6,000 light-years away from Earth.
Supernovae of Type I, novae and cataclysmic variable stars are all cases where the companion to a white dwarf star has reached a point in its evolution where it is increasing in diameter and losing mass to the white dwarf.
2. RR Lyrae stars are a type of cataclysmic variable. (Hint)
3. The Galactic halo contains about as much gas and dust as the Galactic disk. (Hint)
4. The Galactic disk contains only old stars. (Hint) ...
It detected several thousand new X-ray sources in our galaxy and beyond, discovered that cataclysmic variable stars in our own galaxy emit X rays when they are in outburst, ...
JAMES C. WHITE II is ASP staff astronomer and editor of Mercury magazine. His research concerns cataclysmic variables, and his passions are writing and trying to hear the music of the spheres.
File:Main tycho remnant full.jpgA Type Ia supernova is a sub-category of cataclysmic variable stars that results from the violent explosion of a white dwarf star....
e and corroborated by other data.
The relative fractions ...
Firstly X-rays are emitted by black holes in active galactic nucleus, or AGN for short, galaxy clusters, supernova remnants, stars, binary stars containing a white dwarf (cataclysmic variable stars), neutron star or a black hole (X-ray binaries), ...
This occurs through the inner Lagrangian point where the gravity of the two stars cancels, and is responsible for a number of astronomical phenomena including cataclysmic variables, Type Ia supernovae, and many X-ray binary systems.
The current mass loser will probably become an odd white dwarf, while the system may for a time become some kind of "cataclysmic variable" in which even more erratic mass loss causes it to vary erratically. One member may someday even explode.
 See also: Star, Dwarf, White Dwarf, Sun, Orbit
|
