Definition: Roche lobe: The volume around a star in a binary system in which, if you were to release a particle, it would fall back onto the surface of that star.
ROCHE LOBE - Volume of space within which any matter is controlled by the gravity field of a single object, named after the French mathematician Edouard Roche (1820-1883).
Roche Lobe
The first equipotential surface for two massive bodies describing circular orbits around one another which forms a figure eight enclosing the two objects. The Roche lobes are the two lenticular volumes enclosing the two bodies.
Roche lobe: In a system with two bodies orbiting each other, the volume of space dominated by the gravitation of one of the bodies.
ROCHE LOBE
One of two volumes in the space around a pair of mutually orbiting bodies wherein the gravitational field of one of the bodies predominates.
Roche lobe - The region around a star in a binary system in which the gravity of that star dominates
Rock - A solid aggregation of grains of one or more minerals ...
Roche lobe An imaginary surface around a star. Each star in a binary system can be pictured as being surrounded by a tear-shaped zone of gravitational influence, the Roche lobe.
Roche Lobe: The region surrounding a star in a binary system inside of which the star's material is gravitationally bound to the star. If a star exceeds its Roche lobe it can become a semidetached binary.
- Roche lobe - Space and Astronomy Definition - Online Dictionary and Glossary Definition of Roche lobe
- binary stars - Space and Astronomy Definition - Online Dictionary and Glossary Definition of binary stars ...
The Roche lobes of the two stars meet at a point on the line joining them"the inner Lagrange point (L1), which we saw in Chapter 14 when discussing asteroid motions in the solar system.
The Roche lobe of HDE 226868 defines the region of space around the star where orbiting material remains gravitationally bound. Material that passes beyond this lobe may fall toward the orbiting companion.
The Roche Lobe isn't a physical barrier like a wall, but it just defines how the gravitational pull of the binary system causes material to move in certain ways.
This occurs as circumstellar gas (associated with radio or H alpha emission) overfills the Roche lobe (the volume where a star's gas is gravitationally bound) of Star B and then is pulled out by tidal forces in a "star [or accretion] stream" that ...
The dwarf novae are binary stars where one star is a white dwarf, and the other is a dwarf star overflowing its Roche lobe and spilling some of its mass onto the white dwarf.
We can classify the state of a binary system by whether or not either of the stars is filling its Roche Lobe. If the two stars are well separated and nowhere near the size of the critical figure 8 surface then they are called a detached binary.
(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 through ...
The giant star has expanded to fill its Roche lobe and is depositing material into the gravitational potential well of the white dwarf forming an accretion disk (and 'hot spot').
The planet is 40 percent more massive than Jupiter and its exosphere is so deformed that its radius exceeds its Roche lobe - the region of space around the planet within which material is gravitationally bound, ...
For a discussion of the case where the negligible body is a satellite of the body of lesser mass, see Hill sphere; for binary systems, see Roche lobe; for another stable system, see Lagrangian point.
The larger star raises such huge tides in the smaller that it fills its zero-gravity surface (the "Roche Lobe"), where the gravities of the two stars in a sense cancel each other.
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.
 See also: Mass, Star, Distance, Period, Second
  
|
RSS
