Sentences with phrase «of halo stars»

For the first time, Bergemann's team presented detailed chemical abundance patterns of these halo stars using the W. M. Keck Observatory on Maunakea, Hawaii.

The odd motion marks them as members of the Milky Way's ancient population of halo stars.

Not exact matches

Bill Bradley, the former U.S. senator and basketball star, who's been on the Starbucks board since 2003, says the company's reputation is central to its success — a kind of halo effect.

recently held its fifth annual charity event, this year in support of STARS Air Ambulance, with a percentage also going to HALO Rescue.

«The outcome of the Auriga Project is that astronomers will now be able to use our work to access a wealth of information, such as the properties of the satellite galaxies and the very old stars found in the halo that surrounds the galaxy.»

Scientists have looked for the gravitational effects of unidentified, star - sized objects, which could be made either of normal matter or dark matter, known as massive compact halo objects, or MACHOs.

[4] Spiral galaxies have an obvious disc structure, with a distended bulge of stars in the centre and surrounded by a diffuse cloud of stars called a halo.

Brown says that the movements of these stars could reveal the shape of the dark matter halo around our galaxy.

«First proper motions measured of stars in a small galaxy outside the Milky Way: Findings question models of dark matter halos.»

Analysis shows an unexpected preference in the direction of movement, which suggests that the standard theoretical models used to describe the motion of stars and dark matter halos in other galaxies might be invalid.

Powerful radio jets from the black hole - which normally suppress star formation - are stimulating the production of cold gas in the galaxy's extended halo of hot gas.

Frebel used the Clay Magellan Telescope in the Chilean Andes to search the halo of the Milky Way — its outer reaches, where old stars lurk — and turned up a bright red giant about eight - tenths the mass of our sun, dubbed HE 1523 - 0901, that appeared to meet all the requirements.

Astronomers have deduced that astonishing conclusion from the following facts: The Milky Way's familiar pinwheel of relatively young stars sits amid an extended spherical halo of older stars and gas.

Despite their name, MACHOs need not occur only in the galactic halo, so astronomers can search for them by looking for microlensing effects anywhere where there are large numbers of stars.

The object, known as SDSS J0104 +1535, is a member of the so - called halo — the outermost reaches — of our Galaxy, made up of the most ancient stars.

They note that because dark matter halos are thought to be tenuous, they alone can not provide enough gravity to explain the motions of stars above the MOND threshold.

This spheroid (unlike the dark halo) does contain a few visible stars, and its presence (like the dark halo) is required to explain details of the rotation of the visible part of the Galaxy, the relatively thin disc in which most stars live.

On the other hand, we see no stars at all out in the fringes of the dark halo.

appear to be surrounded by massive haloes of dark, unidentified material which betrays its presence only by its gravitational pull on stars and other galaxies.

Everyone assumed the stars were part of the giant halo of invisible matter that surrounds our Galaxy.

Stars would have appeared first where the clouds collided, in what became the dense center of the primordial galaxy, and only later in the more tenuous halo.

But when Lee examined the proportion of stars that had evolved into RR Lyraes in the two regions, he did not find a higher proportion in the halo, as one would expect: he found a higher proportion of RR Lyraes in the bulge.

But if the oldest stars are at the center of the galaxy rather than in the halo, then something is wrong with the standard picture.

Lee compared groups of stars from two different regions of the galaxy: the central bulge and the roughly spherical, globular - cluster - studded halo that surrounds the Milky Way disk.

The glow seemed consistent with the size and shape of the matter needed to make ngc 5907 spin the way it does, so astronomers hoped that this might be the first sign that the dark halos were made of ordinary stars and planets — albeit faint ones — rather than exotic, yet - to - be discovered particles.

The best interpretation is that we are seeing light from stars outside of galaxies but in the same dark matter halos.

In this cycle, jets shooting out of the galaxy's center heat a halo of surrounding gas, controlling the rate at which the gas cools and falls into the galaxy to form stars.

After the latest encounter, most of its remaining stars were no longer bound together, but they have yet to drift away and completely blend into the Milky Way's halo.

Astronomers at the University of Michigan's College of Literature, Science, and the Arts (LSA) discovered for the first time that the hot gas in the halo of the Milky Way galaxy is spinning in the same direction and at comparable speed as the galaxy's disk, which contains our stars, planets, gas, and dust.

Even the discovery just last year of MACHOs — massive astrophysical compact halo objects, also known as brown dwarf stars (possibly)-- gets in.

Most large spiral galaxies, including our Milky Way, have a halo of invisible, or dark, matter surrounding the visible stars.

Both NGC 2419 and MGC1 are missing stars at their fringes, leading the researchers to conclude that they formed in the absence of dark matter halos.

Most of the galaxy's stars, including the sun, reside in a thin, pancake - shaped disk, but ancient stars populate a halo surrounding the disk.

Some astronomers believe that, in the early cosmos, it formed halos that compressed gas and dust, sparking the formation of stars.

Beers says the same method can date not only more stars in the inner halo but also those in the outer halo, which prevails beyond the edge of the Milky Way's stellar disk.

The properties of these gaseous halos control the rate at which stars form in galaxies according to models of galaxy formation,» explained the lead investigator, Nicolas Lehner of the University of Notre Dame, Indiana.

The gargantuan halo is estimated to contain half the mass of the stars in the Andromeda galaxy itself, in the form of a hot, diffuse gas.

Similar streams of stars — curved, elongated regions with high stellar densities — have been found in the outer halo of our own Milky Way galaxy.

But if the theory of dark matter is correct, then the speed of stars rotating on the galaxy's outskirts should also depend on the shape of the galaxy's dark matter halo.

The Milky Way, the galaxy we live in, consists of a prominent, relatively flat disc with closely spaced bright stars, and a halo, a sphere of stars with a much lower density around it.

The team used several hundred thousand compute hours at NERSC to produce a series of 2D and 3D simulations that helped them examine the role of dark matter halo photoevaporation — where energetic radiation ionizes gas and causes it to disperse away from the halo — played not just in the early formation of stars but also the assembly of later galaxies.

An international team of astronomers led by the Max Planck Institute for Astronomy (MPIA) has made a surprising discovery about the birthplace of groups of stars located in the halo of our Milky Way galaxy.

This provides compelling evidence that the halo stars most likely originate from the Galactic thin disk (the younger part of Milky Way, strongly concentrated towards the Galactic plane) itself.

This extreme separation indicates that the galaxies» gas content extends well beyond their star - filled disks, suggesting that each galaxy is embedded in a monstrous halo of hydrogen gas.

These progenitors of today's giant spiral galaxies are surrounded by «super halos» of hydrogen gas that extend many tens - of - thousands of light - years beyond their dusty, star - filled disks.

Globular clusters, which are found in the halo of a galaxy, contain considerably more stars and are much older than the less dense galactic, or open clusters, which are found in the disk.

These halo stars are grouped together in giant structures that orbit the center of our galaxy, above and below the flat disk of the Milky Way.

The object, known as SDSS J0104 +1535, is a member of the so - called halo — the outermost reaches - of our Galaxy, made up of the most ancient stars.

The team also found that the RGB stars in M82's outer halo have significantly bluer colors, showing that they are more metal - poor than those in M81, the NGC 3077 halos and the inner halo of M82.

The distribution of RGB stars shows that the extended stellar halos of the three main galaxies overlap each other, and that the outer regions of M82 and NGC 3077 are highly perturbed.