Sentences with phrase «of a white dwarf star by»

A type Ia supernova represents the total destruction of a white dwarf star by one of two possible scenarios.

Not exact matches

«The gas which forms the major part of the insterstellar medium,» explains Jorge García Rojas, a researcher at the IAC who is the first author on the paper «can be observed because its atoms are ionized by the photons emitted by the hot stars embedded inside it (which can either very massive stars, or white dwarfs, which are also very hot).

• How might the burned - out stars called white dwarfs be brought to ruin by other stars in so - called Type Ia supernovae, inciting the fiery alchemy that yielded much of the iron in our blood and the potassium in our brains?

Researchers have discovered a white dwarf star with an atmosphere dominated by oxygen, a type of white dwarf that has been theorized to exist but not identified to date.

The diffuse cloud in this image, taken with the Carnegie Institution for Science's Swope telescope in Chile, is the shell of hot hydrogen gas ejected by a white dwarf star on March 11, 1437.

Led by Christopher Manser of the University of Warwick's Astrophysics Group, the researchers investigated the remnants of planetary systems around white dwarf stars; in this instance, SDSS1228 +1040.

Using data involving the temperature and brightness of the stars collected by the Hubble Space Telescope, they observed 44 blue stragglers among the cluster's many thousands of red - giant and white - dwarf stars.

Known as 2014J, this was a Type la supernova caused by the explosion of a white dwarf star, the inner core of star once it has run out of nuclear fuel and ejected its outer layers.

Artist's impression of a rocky and water - rich asteroid being torn apart by the strong gravity of the white dwarf star.

Type Iax supernovae may be caused by the partial destruction of a white dwarf star in such an explosion.

Type Ia supernovae are caused by the complete destruction of a white dwarf star in a thermonuclear explosion.

How such a dense planet formed is unclear, the researchers say, but it's probably the crystalline vestige of a white dwarf star whose atmosphere was stripped away by the parent pulsar.

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.

Previous work had unified the variability in discs around black holes of different mass ranges, but by considering not just the mass of the object, but also its size, scientists can now add accreting white dwarfs and proto - stars to this unified picture.

The Little Ghost (right) is a more classic planetary nebula: Its doughnut is the steadily expanding ring of star gas that has been ionized and set aglow by ultraviolet light from the central white dwarf.

Artist impression of a rocky and water - rich asteroid being torn apart by the strong gravity of the white dwarf star GD 61.

The sun will eventually lose most of its mass as it becomes a white dwarf, and could come to resemble other burnt - out star systems spotted by NASA's Spitzer Space Telescope in a 2009 study.

My research concentrates on the study of exploding stars — mainly nova outbursts caused by thermonuclear explosions on the surface of white dwarfs in binary star systems.

Researchers using NASA's Hubble Space Telescope have observed, for the first time ever, an enormous object with the composition of a comet being shredded and scattered by a white dwarf, the burned - out husk of a massive star.

While it's known that Type 1a supernovae form from collapsing white dwarfs — the densest forms of matter after black holes and neutron stars — their formation theories come in two flavors: the single degenerate scenario in which a normal star is consumed by a white dwarf; and the double degenerate scenario in which two white dwarfs merge.

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).

The astronomers identified the white dwarfs by analyzing the colors of the bulge stars and comparing them with theoretical models.

The team based its results on an analysis of 70 of the hottest white dwarfs detectable by Hubble in a small region of the bulge among tens of thousands of stars.

Building on past observations of the white dwarf called SDSSJ1043 +0855 (the dead core of a star that originally was a few times the mass of the Sun), which has been known to be gobbling up rocky material in its orbit for almost a decade, the team used Keck Observatory's HIRES instrument fitted to the 10 - meter Keck I telescope as well as data from the Hubble Space Telescope to measure and characterize the material being accreted by the star.

Specifically, the inferred presence of calcium - carbonate came from examining the atomic leftovers of the planet accretion event in the atmosphere of the white dwarf star — after the presumed dust from the planet's demolished surface was consumed by the white dwarf.

The story began with observations by Justin Steinfadt, a UCSB physics graduate student who has been monitoring white dwarf stars as part of his Ph.D. thesis with Lars Bildsten, a professor and permanent member of UCSB's Kavli Institute for Theoretical Physics, and Steve Howell, an astronomer at the National Optical Astronomy Observatory (NOAO) in Tucson, Ariz..

The observations of the star NLTT 11748 by this research group have yielded the first direct radius measurement of an unusual white dwarf that confirms this theory.

A 1997 paper by astronomers (Henry et al) associated with the Research Consortium on Nearby Stars (RECONS) suggests that the sample of stars known to lie within 10 parsecs (32.6 ly) of Earth is «woefully incomplete,» particularly in faint red (M) dwarfs and «white» dwStars (RECONS) suggests that the sample of stars known to lie within 10 parsecs (32.6 ly) of Earth is «woefully incomplete,» particularly in faint red (M) dwarfs and «white» dwstars known to lie within 10 parsecs (32.6 ly) of Earth is «woefully incomplete,» particularly in faint red (M) dwarfs and «white» dwarfs.

The Huntsman: Winter's War: An all - star cast headed by Charlize Theron, Emily Blunt and Chris Hemsworth is featured in this tale of what happened before Snow White met the Seven Dwarfs.