Sentences with phrase «underluminous stellar remnants»

Eventually, in 10 - 100 quintillion years, these stellar remnants will either have escaped their galaxy's pull, or will have spiraled into the supermassive black hole at the center.

«This opens a new window on this vast population of stellar remnants that we know are out there but of which we have seen only a tiny fraction,» he says.

Yet these stellar remnants should contain no more than a few hundred solar masses.

The International Astronomical Union defines «planet» as a celestial body that, within the Solar System that is in orbit around the Sun; has sufficient mass for its self - gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape; and has cleared the neighbourhood around its orbit; or within another system, it is in orbit around a star or stellar remnants; has a mass below the limiting mass for thermonuclear fusion of deuterium; and is above the minimum mass / size requirement for planetary status in the Solar System.

Little is known about the origins of such wayward stellar remnants.

«The uncanny consistency of this stellar remnant offers intriguing evidence that the fundamental force of gravity — the big «G» of physics — remains rock - solid throughout space,» said Weiwei Zhu, an astronomer formerly with the University of British Columbia in Canada and lead author on a study accepted for publication in the Astrophysical Journal.

Light from the stellar remnant, a neutron star located about 400 light - years away, is polarized, meaning that its electromagnetic waves are oriented preferentially in a particular direction like light that reflects off the surface of water (SN: 7/8/06, p. 24).

Einstein said it couldn't be done, but astrophysicists have used his prediction that gravity bends light to directly measure the mass of a dense stellar remnant

The gamma rays could be generated when charged particles are accelerated by strong magnetic fields around the stellar remnant.

Some theorists have attributed this strange excess to nearby pulsars — fast - spinning stellar remnants — but Hooper suspects that it comes from interactions between dark particles as they whip around the Milky Way.

Supernovae are also the birth places of neutron stars, those extraordinarily exotic, compact stellar remnants, in which about 1.5 times the mass of our Sun is compressed to a sphere with the diameter of Munich.

A firmer line of evidence for supernovae in Carina came from another researcher's 2009 identification of an ultradense stellar remnant called a neutron star there.

Perhaps the dark clusters contain black holes, or other dark stellar remnants in their cores?

«This compact little stellar remnant is a real powerhouse.

A type Ia supernova arises from the explosion of an ultradense stellar remnant known as a white dwarf, but it is less than clear how the white dwarf comes to ignite in a thermonuclear blast.

Previously, some stars hosting planets have been found to have low - mass stars and white dwarf stellar remnants, which can be detected in visual wavelengths.

The stellar remnant has cooled, become dimmer over time, and is presumed to be relatively old (perhaps around nine billion years like its binary companions).

Even for these more massive stars, however, if the residual mass in the core is less than 1.4 solar masses (the Chandrasekhar limit), the stellar remnant will become a white dwarf.

This discovery was a surprise to the astronomical community, which had expected planets around «normal» stars and not around ultra-dense stellar remnants.

Star A is a white dwarf stellar remnant of spectral and luminosity type DA2 / VII.

Sirius is composed of a main - sequence star and a white dwarf stellar remnant.

The companion star, is a white dwarf, stellar remnant and is so dim that it can not be perceived with the naked eye.

Sirius B was the first White Dwarf to be discovered, but it took almost a century from its discovery to the wide acceptance of its nature as a stellar remnant.

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).

Stellar remnants are objects associated with the death of stars.

This is the brightest pulsar — a dense stellar remnant left over from a supernova explosion — ever recorded.

I was thrilled to find the Stellar Remnants Dress ($ 178) in - store so I could give it a whirl.

A planet is an astronomical body orbiting a star or stellar remnant that.

Not exact matches

However, by carefully studying relatively young supernova remnants like Cas A, astronomers can investigate various key processes that drive these titanic stellar explosions.

After analyzing its light echoes, Rest created a three - dimensional model (seen from different angles at left) of the supernova remnant Cassiopeia A, the debris that remains around a centuries - old stellar explosion roughly 11,000 light - years away.

These common elements are found in most galaxies and represent the fossil remnants of stellar evolution.

Both the pulsar and the supernova remnant, which lie 4600 light years from Earth, were likely created in the same stellar explosion.

After conducting a cosmic inventory of sorts to calculate and categorize stellar - remnant black holes, astronomers from the University of California, Irvine have concluded that there are probably tens of millions of the enigmatic, dark objects in the Milky Way — far more than expected.

He said that scientists assume most stellar - remnant black holes — which result from the collapse of massive stars at the end of their lives — will be about the same mass as our sun.

The remnants of recent stellar explosions in our galaxy are intense X-ray sources.

That's what astronomers are asking as they gaze upon the burned - out remnant of a stellar explosion some 16,000 light - years away in the southern constellation Ara.

The first looked at the Cassiopeia A (Cas A) supernova remnant, and so we are able to compare two different stellar explosions and see if they ejected different proportions of phosphorus and iron.

Astronomers have indeed seen the remnants of a previously unknown kind of stellar explosion.

Researchers think these stellar ribbons and arcs are the stretched - out remnants of dwarf galaxies and globular clusters that got too close to the Milky Way and were dissolved by its powerful gravity (Science, 3 January, p. 62).

Owing to its relative proximity to Earth, astronomers observe the remnant to search for a potential stellar survivor of the explosion.

The list of accomplishments is far too large to fit within one article, but they include: the first search for extraterrestrial intelligence; creation of the Drake equation; discovery of flat galactic rotation curves; first pulsar discovered in a supernova remnant; first organic polyatomic molecule detected in interstellar space; black hole detected at the center of the Milky Way; determination of the Tully - Fisher relationship; detection of the first interstellar anion; measurement of the most massive neutron star known; first high angular resolution image of the Sunyaev - Zel» Dovich Effect; discovery of only known millisecond pulsar in a stellar triple system; discovery of pebble - sized proto - planets in Orion, and the first detection of a chiral molecule in space.

Supernova remnants — the leftovers of massive stellar explosions — possess magnetic fields much stronger than previously thought, recent observations of pulsating X-ray hot spots reveal.

This supernova remnant has an apparent age of about 100,000 years - meaning light from the massive stellar explosion first reached Earth 100,000 years ago - but this expanding remnant is not the only aftermath.

In a stellar black hole, which forms when a giant star dies explosively, the rotation is a logical remnant of the star's spin.

Its faint parasol is composed of a stellar stream, thought to be the remnants of a smaller galaxy being pulled apart by the large galaxy's intense gravitational field.

H. Bond (STSci), R. Ciardullo (PSU), WFPC2, HST, NASA — larger image (Gacrux may have a white dwarf companion B, a remnant stellar core that has already cast off its outer gas layers, like planetary nebula NGC 2440.)

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 outskirts of our Galaxy contain various stellar streams that are believed to be the remnants of dwarf galaxies that were torn to shreds by the strong tidal force of the Milky Way.»

HEFT will map the hard X-ray emission from supernova remnants to investigate issues of stellar nucleosynthesis (through the mapping of radioactive Titanium) and study the origin and acceleration of cosmic - rays (through mapping the continuum hard X-rays produced in the same shocks that produce the cosmic - rays).

The European X-ray Observatory Satellite (EXOSAT), originally named HELOS, was an X-ray telescope operational from May 1983 until April 1986 and in that time made 1780 observations in the X-ray band of most classes of astronomical object including active galactic nuclei, stellar coronae, cataclysmic variables, white dwarfs, X-ray binaries, clusters of galaxies, and supernova remnants.