Sentences with phrase «galactic disk»

The researchers considered different scenarios of galactic disk formation and evolution that could account for their observations.

Dark atoms and molecules could perhaps clump together into galactic disks that overlap with the ordinary matter disks and spiral arms of galaxies such as Andromeda.

Mature galactic disks form later, composed of many star - forming regions at 50 — 100 parsec in size.

It will not work for galactic disks, however, like the spiral that forms our Milky Way.

They are vulnerable to collisions, because they form in the comparatively crowded galactic disk.

These features are the evidence of a past energetic bipolar - shaped superwind that blew along the minor axis of the main galaxy disk (orthogonal to the main galactic disk).

In the simulations, described in a study published in the September 15 issue of Nature, Sagittarius stirred up enough ripples to make a smooth, circular, spinning galactic disk evolve into a spiral much like the Milky Way.

The rotation curve is flat in the outer parts of most galactic disks (dark matter!).

A typical spiral galaxy has a spherical central bulge of older stars surrounded by a flattened galactic disk that contains a spiral pattern of young, hot stars, as well as interstellar matter.

The central region of the Milky Way is dominated by a bar - like structure, which stirs up the material in the outer galactic disk as it rotates over millions of years and may be responsible for its spiral structure.

However, their gravity has affected our Galaxy as well, distorting the outer parts of the galactic disk.

Although it is bright, the galaxy sits near the equator of the Milky Way's galactic disk, where the sky is thick with glowing cosmic gas, bright stars, and dark, obscuring dust.

Now, researchers in the nascent field of galactic seismology have found a possible cause of at least some of those ripples: a dwarf galaxy that shot like a bullet through the galactic disk some half - a-billion years ago.

The gas in the galactic disk will circulate faster and faster as it spirals into the vicinity of the SMBH.

To get a better picture of the gamma - ray environment, Douglas Finkbeiner of the Harvard — Smithsonian Center for Astrophysics and his colleagues carefully subtracted those sources based on maps showing locations of cosmic dust, models of the galactic disk, and known emitters of gamma rays, such as active black holes in other galaxies.

If alien lifeforms were to develop on planets orbiting these stars, they would have views of a portion, or all, of the galactic disk.

Using infrared survey images from WISE, the team discovered two clusters of stars thousands of light - years below the galactic disk.

«If so, it's likely that planets will eventually form from this material, as is the case for young stars in the galactic disk.»

«Based on existing models, we expected to find a thin population of young stars at the very edge of the galactic disks we studied,» he said.

«These structures are pushed off the plane of the Milky Way when a massive dwarf galaxy passes through the galactic disk.

And since the inner part of the galaxy revolves faster than the outer part — just as Mercury takes less time to orbit the sun than Pluto does — field lines that pass through both parts get stretched out and pulled down into the galactic disk.

At that time, however, galactic disks were generally clumpy and irregular, so other processes likely overwhelmed the formation of similar eyelid features.

Inside the galactic disk, new stars formed.

Their movements tend to pierce the galactic disk that Sol moves within, leading to a large relative motion.

Because gravity depends upon mass, you might think that most of a galaxy's mass would lie in the galactic disk or near the center of the disk.

The star is at least 5.4 billion years old based on chromospheric anaysis alone (Don C. Barry, 1998, page 3), but its halo subdwarf status would suggest that the star is at least 10 billion years old, having formed during a period of rapid collapse that lasted perhaps a billion years in the early history of the Milky Way galaxy prior the development of the galactic disk.

The Milky Way galaxy is at least 50 percent larger than is commonly estimated, according to new findings that reveal that the galactic disk is contoured into several concentric ripples.

The rotating disks attracted more gas and dust with gravity and formed galactic disks.

We have clearly detected FIR dust emission extended in the halo of the galaxy; there are two filamentary emission structures extending from the galactic disk up to 9 kpc in the northern and 6 kpc in the northwestern direct... ▽ More We present new far - infrared (FIR) images of the edge - on starburst galaxy NGC253 obtained with the Far - Infrared Surveyor (FIS) onboard AKARI at wavelengths of 90 um and 140 um.

As for NGC2976, an extended dust component is observed along the minor axis, which shows a distribution somewhat asymmetrical to the galactic disk; this might be associated with the HI bridge in the M81 / M82 group that NGC2976 belongs to.

We have clearly detected FIR dust emission extended in the halo of the galaxy; there are two filamentary emission structures extending from the galactic disk up to 9 kpc in the northern and 6 kpc in the northwestern direction.

It could easily have been caused by a supernova punching through the top and bottom of the galactic disk, the intense stellar winds from 10 or so hot stars, a powerful gamma - ray burst, or even a large star moving through the area.

The local void of gas extends out of the galactic disk and stretches into the overlying galactic halo region.

Globular clusters orbit the Milky Way galaxy outside the galactic disk at tens of thousands of light - years away.

As the Magellanic Clouds orbit the Milky Way, computer simulations indicate that the galactic disk ripples over time and its edges ruffle «like a table cloth in the breeze» (U.C. Berkeley news release; and Maggie McKee, New Scientist, January 10, 2006).

Due to Kapteyn's proximity to Sol and its deduced ancient origin from outside the galactic disk, the system has been an object of high interest among astronomers.