Sentences with phrase «in satellite galaxies»

Because this scenario depends on the presence of nearby stars, we expect DCBHs to typically form in satellite galaxies that orbit around larger parent galaxies where Population III stars have already formed.

For the past two years, a group calling itself the MACHO collaboration, which includes astronomers in the US, Australia and Britain, has monitored the brightness of stars in the central «bulge» of our Galaxy and in a satellite galaxy known as the Large Magellanic Cloud.

Professor Jim Kaler suggests that Arcturus may even have originally been born in a satellite galaxy that merged into the Milky Way (see his Stars page on Arcturus).

Not exact matches

They should be detectable during a special phase when the seed merges with the parent galaxy — and this process should be common, given that DCBHs probably form in satellites orbiting larger galaxies.

«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.»

An international team of astronomers has determined that Centaurus A, a massive elliptical galaxy 13 million light - years from Earth, is accompanied by a number of dwarf satellite galaxies orbiting the main body in a narrow disk.

Using this technique, scientists have measurements for 11 Milky Way satellite galaxies, eight of which are orbiting in a tight disk perpendicular to the spiral galaxy's plane.

They match Einstein's explanations of everything from the bending of light by distant galaxies to the distortion of time in those gps satellites.

Now, a team of astronomers has used position and velocity data from the Sloan Digital Sky Survey as well as computer simulations of stellar evolution in the Large Magellanic Cloud (LMC, pictured above), a small satellite galaxy near the Milky Way, to show that these speeding stars may come from there.

«The significance of this finding is that it calls into question the validity of certain cosmological models and simulations as explanations for the distribution of host and satellite galaxies in the universe,» said co-author Marcel Pawlowski, a Hubble Fellow in the Department of Physics & Astronomy at the University of California, Irvine.

This simplified animation shows the Centaurus A galaxy (green circle, center) and some of its satellite galaxies (red and blue circles; the «tails» indicate the direction in which each is moving).

Then they compared their results with new data on stellar motion in 17 Andromeda satellite galaxies (arxiv.org/abs/1301.0822).

Centaurus A, located about 12 million light - years from Earth, is now the first galaxy system observed outside the Local Group whose satellites move in a similarly coordinated dance.

«Stream of stars in Andromeda satellite galaxy shows cosmic collision.»

The rarity of these events — only 15 meaningful ones, seen in the direction of our satellite galaxies, have been recorded — confirmed that brown dwarfs and black holes are far too scarce to make up a significant fraction of the dark portion of our galaxy.

When the cobe satellite in 1992 mapped the faint microwave glow left over from the Big Bang, it couldn't make out structures as small as individual galaxies, or even clusters of galaxies.

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.

The satellite galaxy Andromeda II is located in a distant orbit approximately 600,000 light years from the center of the great Andromeda Galaxy.

In a paper to appear in Publications of the Astronomical Society of Australia, Forbes and Kroupa have offered five possible criteria for determining whether an object is a galaxy: the presence of dark matter, multiple generations of stars, satellite star clusters, a minimum size, and the time it takes for gravitational interactions between stars to slow them all down to roughly the same speeIn a paper to appear in Publications of the Astronomical Society of Australia, Forbes and Kroupa have offered five possible criteria for determining whether an object is a galaxy: the presence of dark matter, multiple generations of stars, satellite star clusters, a minimum size, and the time it takes for gravitational interactions between stars to slow them all down to roughly the same speein Publications of the Astronomical Society of Australia, Forbes and Kroupa have offered five possible criteria for determining whether an object is a galaxy: the presence of dark matter, multiple generations of stars, satellite star clusters, a minimum size, and the time it takes for gravitational interactions between stars to slow them all down to roughly the same speed.

«Just this year, more than 20 of these dwarf satellite galaxy candidates have been spotted, with 17 of those found in Dark Energy Survey data,» said Alex Drlica - Wagner of the U.S. Department of Energy's (DOE) Fermi National Accelerator Laboratory, one of the leaders of the DES analysis.

The 17 dwarf satellite galaxy candidates were discovered in the first two years of data collected by the Dark Energy Survey, a five - year effort to photograph a portion of the southern sky in unprecedented detail.

We thought satellite galaxies were usually in random orbits around larger ones, but a handful in coordinated orbits may force us to rethink galaxy formation

The galaxies were then divided into those that are central to their local environment (the center of gravity) and those that roam around in their host environments (satellites).

«Compared to the central galaxies, it is the smaller gravitational pull of the satellite galaxies produced by their smaller mass, that results in a more efficient loss of gas and hence, a slow - down in star formation activity with respect to the more massive central galaxies» said Chris Martin, a professor of astronomy at Caltech.

RIT researchers make the case for the existence of «missing» satellite galaxies that are cloaked in dark matter and can not be directly observed.

«Scientists find rare dwarf satellite galaxy candidates in dark energy survey data.»

The Gaia satellite's main mission may be to map the stars in our home galaxy, but its extracurricular plans are just as thrilling

SXP 1062 is located in the Small Magellanic Cloud, a satellite galaxy of our own Milky Way galaxy, and one of our nearest intergalactic neighbours at 200,000 light years away.

Last year, «dark stars» were discovered suspended in space between the Milky Way and its satellite galaxies.

In the past year, several research groups have observed the temporary brightening of stars in the Magellanic Clouds, satellite galaxies of the Milky WaIn the past year, several research groups have observed the temporary brightening of stars in the Magellanic Clouds, satellite galaxies of the Milky Wain the Magellanic Clouds, satellite galaxies of the Milky Way.

The new object is comparable in size to the Large Magellanic Cloud (LMC), a diminutive satellite galaxy of our Milky Way.

Its discovery suggests the presence of a large number of yet - undetected dwarf satellites in the halo of the Milky Way and provides important insights into galaxy formation through hierarchical assembly of dark matter.

At the absolute magnitude of -0.8 in the optical waveband, it may well be the faintest satellite galaxy yet found.

Over the past few years, balloon and satellite cosmic - ray experiments have found high - energy electrons and their positively charged counterparts, positrons, in concentrations much higher than they would expect to see from the sun and other known sources of cosmic rays within our galaxy.

Instead, they found a strange burst of radio noise recorded in 2001 that appeared to originate well beyond one of the satellite galaxies that orbit the Milky Way.

The flare's name, Swift J1644 +57, honors the satellite that spotted it and gives the galaxy's celestial coordinates in the constellation Draco.

Most other giant spirals lack large, close - in, gas - rich satellite galaxies like the Magellanic Clouds.

At first glance, it appeared to have originated in an area of the sky around the Magellanic Clouds, two small satellite galaxies orbiting the Milky Way at a distance of about 200,000 light - years.

But Fox suspects that other giant spirals also get replenished when gas - rich satellites fall toward them; we just happen to live in one of the few galaxies where this process is occurring today, giving astronomers a ringside seat on the refueling of a giant galaxy.

Stuart Clark describes how a superfluid Bose - Einstein state of dark matter particles might explain the streams of dwarf satellite galaxies in polar orbit around the Milky Way and Andromeda galaxies (2 April, p 30).

«We were surprised to find that a large proportion of pairs of satellite galaxies have oppositely directed velocities if they are situated on opposite sides of their giant galaxy hosts,» said lead author Neil Ibata of the Lycée International in Strasbourg, France.

They studied the object, which lies in the Circinus spiral galaxy 13 million light - years away, not only with NuSTAR but also with the European Space Agency's XMM - Newton satellite.

Recent advances in observational technique allow the detection of the extremely faint structure around galaxies, such as loops or debris that are likely made by dynamical interactions with satellite galaxies..

The sinking SMBH from the satellite galaxy would eventually create a disturbance in the rotating gas disk around the main galaxy's SMBH.

«However, the situation could be totally different if the satellite galaxy has a (smaller) SMBH in its center,» Professor Taniguchi suggests, «because the black hole can never be broken apart.

But a new study shows that most of the 20 or so hypervelocity stars found so far might actually come from outside our own galaxy, in the Large Magellanic Cloud, a small satellite galaxy orbiting the Milky Way at nearly 400 kilometers per second.

In this episode, Scientific American editor George Musser talks with Caltech Astronomer Josh Simon about dark matter, and about the efforts to try to locate the so - called missing satellites of the Milky Way — small galaxies that have yet to be found in the numbers that the cold dark matter theory predictIn this episode, Scientific American editor George Musser talks with Caltech Astronomer Josh Simon about dark matter, and about the efforts to try to locate the so - called missing satellites of the Milky Way — small galaxies that have yet to be found in the numbers that the cold dark matter theory predictin the numbers that the cold dark matter theory predicts.

First, a team led by astronomer Jon Miller of the Harvard - Smithsonian Center for Astrophysics (CfA) in Cambridge, Massachusetts, used the European Space Agency's XMM - Newton satellite to study two bright x-ray sources in the nearby galaxy NGC 1313.

The red clusters are believed to form as the galaxy forms, while the blue clusters are later brought in as smaller satellites are swallowed by the central galaxy.

David Merritt, professor of astrophysics at Rochester Institute of Technology, co-authored «Co-orbiting satellite galaxy structures are still in conflict with the distribution of primordial dwarf galaxies,» to be published in an upcoming issue of Monthly Notices of the Royal Astronomical Society.