Sentences with phrase «companion white dwarf star»
The extremely strong gravity of a massive neutron star in orbit with a companion white dwarf star puts competing theories of gravity to a test more stringent than any available before
http://religion.blogs.cnn.com/ Not exact matches
Matter falling from a companion star onto a white dwarf might have induced a thermonuclear chain reaction that forced the dwarf to expand radically without exploding into a more common nova, Bond notes.
CANNIBAL ZOMBIE STAR Dead stars called white dwarfs (left) steal material from ordinary companion stars (right), as shown in this artist's illustration.
The companion star may have dumped its gas on the white dwarf until the added weight sparked a thermonuclear detonation.
The event was what's known as a classical nova explosion, which occurs when a dense stellar corpse called a white dwarf steals enough material from an ordinary companion star for its gas to spontaneously ignite.
That happens if it has a companion star, as most stars in the galaxy do, and the white dwarf orbits it closely enough to steal material from it.
A nova can occur if the strong gravity of a white dwarf pulls material from its orbiting companion star.
The measurement is the distance to SS Cygni, a star system consisting of a white dwarf plus a companion.
Another, less common kind of supernova, type 1a, occurs when a remnant of a star called a white dwarf steals matter from a companion star until the white dwarf explodes (SN: 4/30/16, p. 20).
At first glance this exploding star had all the features of a type Ia supernova, which happens when a small, dense white dwarf star steals material from an orbiting companion and then explodes.
Sandage's preferred method is to use type Ia supernovae, which arise when a white dwarf star gathers material from a companion and explodes.
These so - called supersoft sources are now thought to be white dwarf stars that cannibalize their stellar companions and then, in many cases, explode
When Sigurdsson and colleagues analyzed images of the white dwarf from the Hubble Space Telescope, they concluded that the distant, unseen companion is not a low - mass star, as many researchers had thought, but a planet with about 2.5 times the mass of Jupiter.
[3] Type Ia Supernovae occur when an accreting white dwarf in a binary star system slowly gains mass from its companion until it reaches a limit that triggers the nuclear fusion of carbon.
PSR J1713 +0747, as it is known, has a tiny white dwarf companion star, and the two orbit each other exceptionally predictably.
Such a supernova is supposed to result when a larger companion star dumps material onto the white dwarf, triggering a runaway nuclear reaction that annihilates the small star.
Astronomers have detected a sub-stellar object that used to be a star, after being consumed by its white dwarf companion.
Neither study searched for the stars responsible for so - called type Ia supernovae, which are explosions of white dwarf stars that have grown overweight by feasting on material from a companion star.
Such a shock could not have been produced if the companion were another white dwarf star.
The UCSB - led research implies that the white dwarf was stealing matter from a much larger companion star — approximately 20 times the radius of the sun — which caused the white dwarf to explode.
Astronomers thought white dwarfs gained mass from a companion star, but about half of the type Ia supernovae show no signs of a companion.
The first so - called helium nova, the possible result of a large white dwarf sucking material from a hydrogen - deficient companion star, may be a precursor to a supernova
The white dwarf accretes material from the companion star, then at some point, it might explode as a type Ia supernova.
Specifically, the most energetic iron emission they studied is characteristic of so - called x-ray binary starsduos comprised of a dense stellar object such as a white dwarf star, a neutron star or a black hole that collects matter from a less dense companion, emitting x-rays in the process.
The traditional view held that a white dwarf, locked in a binary pairing with another star, sucked matter from its companion, growing ever larger in size until it could no longer support its own weight.
In this theory material from the companion star is accreted onto the white dwarf until its mass reaches a limit, leading to a dramatic explosion.
Both occur in systems where two stars orbit each other: a white dwarf sucks away the outer layers of a larger companion star until the smaller star reaches a critical mass, causing an explosion.
The second theory proposes that only one star in the system is a white dwarf, while its companion is a normal star.
A binary star system (consisting of a white dwarf and a companion star) that rapidly brightens, then slowly fades back to normal.
«Our final image should show us a companion 100 times fainter than any other white dwarf orbiting a neutron star and about 10 times fainter than any known white dwarf, but we don't see a thing,» team member Bart Dunlap, a graduate student from the University of North Carolina at Chapel Hill, said in a statement.
12 systems were resolved as new binaries, including the discovery of a new white dwarf companion to the star HD8049.
The find reveals surprising information about the companion star next to the white dwarf that sparked the spectacle.
The companion star, is a white dwarf, stellar remnant and is so dim that it can not be perceived with the naked eye.
David Aguilar, Harvard - Smithsonian Center for Astrophysics — larger «day» and «night» images At maximum brightness, Mira would light up a hypothetical planetary companion, but at its most dark, the giant star's small, hot white dwarf companion would become visible (more discussion with illustration).
HD 147513 A is a so - called young «Barium dwarf» (s - process element rich but comparatively carbon deficient) star that was probably enriched by an asymptotic branch giant (AGB) star (see Gacrux) but is now a very dim, white dwarf companion, which has an observed separation of around 4,400 AUs — 5.7» at a HIPPARCOS distance estimate of 42.0 ly (Porto de Mello and da Silva, 1997; and Poveda et al, 1993, pp. 74 - 75).
Nicknamed «the Pup» as the much smaller companion to the Dog Star, this much dimmer object is a white dwarf (DA2 - 5 or A2 - 5 VII).
They are so called because one of the pair of stellar companions is a normal star and the other a compact object — a white dwarf, neutron star, or possibly a black hole.
H. Bond (STSci), R. Ciardullo (PSU), WFPC2, HST, NASA HD 147513 B is a young white dwarf (a remnant stellar core which enriched its binary companion, Star A) with elements heavier than hydrogen when it cast off its outer gas layers) like planetary nebula NGC 2440.
The star may have an unseen, close spectroscopic companion, which could be a very dim red dwarf star or a white dwarf stellar remnant (more below).
Stars with white dwarf companions are common; some of the brightest stars in the sky have white dwarf companions, like Sirius and ProStars with white dwarf companions are common; some of the brightest stars in the sky have white dwarf companions, like Sirius and Prostars in the sky have white dwarf companions, like Sirius and Procyon.
the first debris disk around a star with a companion white dwarf!
Such «barium stars» may be binaries, where a more massive companion has already thrown off its outer gas envelopes as a planetary nebula in becoming a white dwarf (see HD 147513 AB).
[VIDEO: Cannibal White Dwarf Feeds on Companion Star]
As the white dwarf pulls material from a companion star, the temperature increases, eventually triggering a runaway reaction that detonates in a violent supernova that destroys the white dwarf.
The giants among those stars are presumed to produce this carbon themselves, but some stars in this class are double stars, whose odd atmosphere is suspected of having been transferred from a companion that is now a white dwarf, when the companion was a carbon - star.
type 1a supernova A supernova that results from some binary (paired) star systems in which a white dwarf star gains matter from a companion.
During that night, the scientists were able to measure the changing Doppler shift of the star NLTT 11748 as it orbited its faint, but more massive, white dwarf companion.
The Sun, the 12 brightest stars of the Northern Hemisphere and the white dwarf companion stars to Sirius and Procyon are shown.