Sentences with phrase «from dwarf stars»

«The energy output from dwarf stars like TRAPPIST - 1 is much weaker than that of our Sun,» comments Study co-author Amaury Triaud.

Co-author Amaury Triaud expands: «The energy output from dwarf stars like TRAPPIST - 1 is much weaker than that of our Sun.

The first and second planets from the dwarf star are probably less than 15 percent water by mass, still far wetter than Earth, the researchers found.

Not exact matches

Whether giants, medium - sized or dwarfs, the stars are curiously similar in mass (from one to ten times the mass of the sun), which proves, incidentally, that they must vary prodigiously in their mean density — 1.4 in the case of the Sun, but 50,000 and even 300,000 in the case of the dwarf stars (a fragment the size of a pinch of snuff, brought from one of these to Earth, would weigh a ton!)

In nature, changes of environmental conditions arise from such sources as the melting of polar ice - caps, explosion of dwarf stars, the fall of night.

The Black Stars goalkeeper returned from South Africa a fortnight ago to make his Ghana Premier League debut for the season against Ebusua Dwarfs.

The study, «Accretion - induced variability links young stellar objects, white dwarfs, and black holes», which is published in the journal Science Advances, shows how the «flickering» in the visible brightness of young stellar objects (YSOs)-- very young stars in the final stages of formation — is similar to the flickering seen from black holes or white dwarfs as they violently pull matter from their surroundings in a process known as accretion.

Because dwarf stars are so small and dim, transiting planets block a bigger proportion of the light — making the transits more apparent from Earth.

Planet GJ 1214 b, seen here with two hypothetical moons, orbits a dim red dwarf star 40 light - years from Earth.

Even though the star GJ 1214 is a puny red dwarf, it would still look 17 times larger from GJ 1214 b than the sun does in our sky.

From the way the object bent the light, Andrew Gould of Ohio State University in Columbus and colleagues have now found that it is a brown dwarf — a «failed star» with too little mass to sustain the nuclear reactions that power stars.

The atmospheres of some white dwarf stars contain heavy elements, which are thought to result from eating asteroids.

OXYGEN on a planet might be a sign of life, but in two odd white dwarf stars it could indicate a narrow escape from violent death.

Researchers from the Dark Cosmology Centre at the Niels Bohr Institute, among others, have analysed measurements of the stars in the dwarf galaxy Andromeda II and made a surprising discovery.

Instead, the bursts could come from a young neutron star orbiting the dwarf galaxy's dominant black hole, which probably has between 10,000 and 1 million times the mass of the sun, he says.

If black hole seeds come from stars, the process should have given every dwarf galaxy its own supermassive black hole.

Researchers from the Niels Bohr Institute, among others, have detected a stream of stars in one of the Andromeda Galaxy's outer satellite galaxies, a dwarf galaxy called Andromeda II.

PASADENA, CALIFORNIA — The surprising heat from 63 brown dwarfs is helping astronomers make the case that these puzzling objects are failed stars, and not big planets, as some have argued.

For that reason, Hyman's team has not ruled out a lower - energy source, such as magnetic outbursts from a dim «failed star» called a brown dwarf.

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.

Stars yanked from the Sagittarius dwarf galaxy (red) loop around the Milky Way and dive near our sun (yellow dot).

The white dwarf star is located about 570 light - years from Earth in the constellation Virgo.

It orbits a red dwarf — a small, cool, faint star — at 2.6 times Earth's distance from the sun.

According to the team's models, so many stars have been ripped from the Sagittarius dwarf in the last 2 billion years that the little galaxy — 10,000 times less massive than the Milky Way — is on its last legs.

CANNIBAL ZOMBIE STAR Dead stars called white dwarfs (left) steal material from ordinary companion stars (right), as shown in this artist's illustration.

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.

Located 1,350 light - years away, the Orion Nebula is a relatively nearby laboratory for studying the star formation process across a wide range, from opulent giant stars to diminutive red dwarf stars and elusive, faint brown dwarfs.

Imagine being able to view microscopic aspects of a classical nova, a massive stellar explosion on the surface of a white dwarf star (about as big as Earth), in a laboratory rather than from afar via a telescope.

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.

Typical galaxies range from dwarfs with as few as ten million stars up to giants with one trillion stars, all orbiting a common center of mass.

At least seven planets orbit this ultracool dwarf star 40 light - years from Earth and they are all roughly the same size as the Earth.

Life might emerge on a red dwarf planet, some now think, after the star has aged and its flares have settled down; winds on the planet might transport heat from one hemisphere to the other, keeping the atmosphere from freezing.

A nova can occur if the strong gravity of a white dwarf pulls material from its orbiting companion star.

Gregg Hallinan of the California Institute of Technology and colleagues have detected both types of radiation from what appears to be a brown dwarf, an object that straddles the boundary between planet and star.

All type 1a evolve from a type of star called a white dwarf, but pinning down exactly which white dwarfs are supernova precursors could lead to much more precise measurements of dark energy — and even reveal its true nature.

[1] The team used data from the UVES spectrograph on ESO's Very Large Telescope in Chile (to determine the properties of the star accurately), the Carnegie Planet Finder Spectrograph (PFS) at the 6.5 - metre Magellan II Telescope at the Las Campanas Observatory in Chile, the HIRES spectrograph mounted on the Keck 10 - metre telescope on Mauna Kea, Hawaii as well as extensive previous data from HARPS (the High Accuracy Radial velocity Planet Searcher) at ESO's 3.6 - metre telescope in Chile (gathered through the M dwarf programme led by X. Bonfils and M. Mayor 2003 - 2010.

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).

Using data gathered by an infrared camera during a survey of such stars, astronomers have found that the brightness of a brown dwarf — dubbed 2MASS 2139, which lies about 47 light - years from Earth — varied as much as 30 % in less than 8 hours.

Recently, a newly discovered Earth - sized planet orbiting Ross 128, a red dwarf star that is smaller and cooler than the sun located some 11 light years from Earth, was cited as a water candidate.

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.

It orbits a dim, red dwarf star (shown at left) about 200 light - years from Earth.

But some scientists have suggested the fast - moving stars near the cluster centres could instead result from the gravity of many dim, dead stars such as white dwarfs or neutron stars.

Apps noted that the precise colors of KOI - 961, which is some 120 light - years away from Earth, are exactly like those of a much nearer red dwarf star known as Barnard's Sstar known as Barnard's StarStar.

That is because white dwarfs are 1000 times dimmer than stars like the Sun, which are so bright that they overwhelm any reflected light from planets around them.

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.

Dwarf galaxies, amorphous blobs of only tens of millions of stars, were cranking out nearly a third of the new stars in the universe from about 8 billion to 10 billion years ago, according to new research posted June 17 on arXiv.org.

TRAPPIST - 1 is an ultra-cool red dwarf star that is slightly larger, but much more massive, than the planet Jupiter, located about 40 light - years from the Sun in the constellation Aquarius.

[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.

The new survey will pick targets from a list of about 70,000 red dwarfs compiled by Andrew West at Boston University, and will listen to the stars in radio frequency bands between 1 and 10 gigahertz.