Sentences with phrase «dwarf companion stars»
The Sun, the 12 brightest stars of the Northern Hemisphere and the white dwarf companion stars to Sirius and Procyon are shown.
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PSR J1713 +0747, as it is known, has a tiny white dwarf companion star, and the two orbit each other exceptionally predictably.
Not exact matches
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
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.
Close encounter Tracing the trajectory of the star and its brown dwarf companion back in time, Mamajek's team found with 98 % confidence that Scholz's star passed within the Solar System's Oort cloud, a reservoir of comets, about 70,000 years ago.
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.
In all, the team found 17 candidate brown dwarf companions to red dwarf stars, one brown dwarf pair, and one brown dwarf with a planetary companion.
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
«Right now, the star and the brown dwarf are locked in a honeymoon phase, where they both turn the same face to each other all the time,» says Beatty, «but in the future, the star will swell up and engulf its companion completely.»
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.
However, in a star - brown dwarf binary, the star's rotation is much slower than the brown dwarf's orbital motion, so the companion is dragged inward.
[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.
«Our knowledge of binary evolution suggests that, if the companion star can survive the transition, brown dwarfs should be common in this type of system.
In the background is the star's binary companion, Kepler - 13B, and the third member of the multiple - star system is the orange dwarf star Kepler - 13C.
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.
Not only do stars provide a ready energy source of radiated light and heat, but the mass and gravitational pull of stars flat - out dwarfs the summed masses and pulls of any orbiting companions.
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.
The star also has a small companion, a red dwarf star that lies about 1000 times as far away as Earth's distance from the sun.
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.
This red dwarf pulls on the 55 Cancri system, and because all five planets in the system — and their host star — are such a tight - knit family, they behave like ice skaters holding hands, so that the companion star's tugs cause them all to do somersaults in space.
Or it may be influenced by a tidal tug from the star's red dwarf binary companion (HR 4796B), located at least 54 billion miles from the primary star.
Between August 24 and September 18, 2006, two teams of astronomers announced the discovery and direct imaging of a spectral type - T, methane brown dwarf companion (T7.5 + / - 0.5) to this star (PSU press release; Luhman et al, 2006; and Mugrauer et al 2006).
© Estate of John Whatmough — larger image (Artwork from Extrasolar Visions, used with permission from Whatmough) Glowing red through gravitational contraction, the candidate brown dwarf companion to Proxima Centauri is depicted with two moons (one eclipsing the flare star) with distant Alpha Centauri A and B at upper right, as imagined by Whatmough.
This much dimmer companion star is a main sequence, orange - red dwarf (K0 - 1 V).
In 2006, astronomers discovered a very dim («mid-range»), red dwarf companion to HD 189733 A of spectral and luminosity type M V. Observed at a separation of 216 AUs from Star A, the companion star has a clockwise orbit that is nearly perpendicular to the orbital plane of transiting planet b around Star A (HD 189733 b or Star A, the companion star has a clockwise orbit that is nearly perpendicular to the orbital plane of transiting planet b around Star A (HD 189733 b or star has a clockwise orbit that is nearly perpendicular to the orbital plane of transiting planet b around Star A (HD 189733 b or Star A (HD 189733 b or Ab).
The closest star to the sun, proxima centauri, a companion of alpha centauri, is also a red dwarf.
Discovered to be a faint companion of Stars Aab by Ragnar Furuhjelm, Capella C is a red dwarf star of spectral and luminosity type M1 V.
Discoveries of Sun - like stars with host exoplanets as well as red dwarf companions have been common, and many appear to be old and stable enough for life to have evolved (RAS new releases of April 16 and April 19, 2011; and University of St. Andrews press release).
Its red dwarf companion B was first detected through astrometric perturbations of Star A's motion in 1976 by Sarah Lee Lippincott and J.J. Lanning.
Between August 24 and September 18, 2006, two teams of astronomers announced the discovery and direct imaging of a brown dwarf companion to this star (press release; Luhman et al, 2006; and Mugrauer et al 2006 — more below).
NGC 3359 appears to be devouring a much smaller gas rich dwarf galaxy, nicknamed the Little Cub, which contains 10,000 times fewer stars than its larger companion.
A binary star system (consisting of a white dwarf and a companion star) that rapidly brightens, then slowly fades back to normal.