Sentences with phrase «star than the disk»

That fact, combined with computer simulations, led the scientists to conclude that the dust particles in the disk are kept within the disk by the gravitational effect of two planets — one closer to the star than the disk and one more distant.

Not exact matches

The thickest dust disks are most prominent for the youngest stars, less than 100 million years old.

The incoming stars are much farther apart than our neighbors in the Milky Way's disk, so it's unlikely that any will venture very close to the sun.

Watch the changing dust density and the growth of structure in this simulated debris disk, which extends about 100 times farther from its star than Earth's orbit around the sun.

But analysis of particles and isotopes from comets and meteorites present a mixed picture of solar system formation, more complicated than just a one - way movement of matter from the disk to the star.

Such disks have lost all of their gas and are far less dense than the ones around younger stars.

For comparison, the event horizon of a black hole like this is about 13 times bigger than the sun, and the accretion disk formed by the disrupted star could extend to more than twice Earth's distance from the sun.

Although the disk appeared to span less than 100,000 light - years, astronomers had seen sprinkles of other stars scattered far beyond the disk at the same distance from Earth, suggesting that the stars also belonged to the galaxy.

The observed disk obeys Keplerian rotation: the material orbiting closer to the central star revolves faster than material further out.The high - sensitivity observations provided other important information about the object.

This star - forming cluster in the constellation Perseus hosts several huge dusty disks (inset) far wider than our solar system.

Remarkably, these signs appeared around much younger stars than astronomers thought possible, suggesting that planet formation can begin soon after the formation of a protoplanetary disk.

These wild swings indicated that the material from the accretion disk was falling onto the neutron star in fits and starts, rather than in a long and constant stream as astronomers theorized.

It's a white A-type star, somewhat hotter than the sun, and the 18th brightest star in the night; it harbors a dusty disk (main image) and a planet whose existence is controversial.

The discovery that the debris disks around some larger stars retain carbon monoxide longer than their Sun - like counterparts may provide insights into the role this gas plays in the development of planetary systems.

This finding runs counter to astronomers» expectations, which hold that stronger radiation from larger stars should strip away gas from their debris disks faster than the comparatively mild radiation from smaller stars.

Astronomers John Carr of the Naval Research Laboratory in Washington, D.C., and Joan Najita of the National Optical Astronomy Observatory in Tucson, Arizona, used Spitzer to tease out the signals revealing the molecular composition of the gas in the disk surrounding AA Tauri, a star less than a million years old located in the constellation Taurus.

Until now, the prevailing hypothesis has said that as stars evolve, metals (astronomers» term for any chemical elements heavier than hydrogen and helium) in the swirling disk around them form tiny «seeds» that attract other matter and slowly grow into planets.

▪ The detection of stars extending from the Andromeda galaxy's main disk indicates that the galaxy is 220,000 light - years across, three times bigger than previously thought.

The events included «superflares» of more than 100 million °C, arcing far into space and striking disks of gas and dust around the young stars.

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.

Because the front end of the disk eclipses more stars than the back, it appears darker.

Cartoon showing how efficient planet migration around red dwarfs lead to the more observed planets than around sunlike stars, even though the disk is lower in mass and forms fewer planets in total.

With a visual luminosity that has reportedly varied between 0.000053 and 0.00012 of Sol's (based on a distance of 4.22 light - years) the star is as much as 19,000 times fainter than the Sun, and so if it was placed at the location of our Sun from Earth, the disk of the star would barely be visible.

This discovery extends the observation of protoplanetary disks to the high mass regime, where the dynamic is dominated by the mass of the disk rather than the mass of the central star.

We marginally confirm the existence of an offset between the disk center and the star along the line of nodes; however, the magnitude of this offset (x = 27 -LSB--20, +19] mas) is notably lower than that found in our earlier H - band images (Thalmann et al. 2010).

We also measure lower rotational temperatures for transitional disks, and disks around Herbig Ae / Be stars, than for those around T Tauri stars.

We speculate that this truncation of the outer disk may be the signpost of a developing gap due to the effects of a growing protoplanet; the gap is still presumably evolving because material still resides in it, as indicated by the silicate emission, the molecular hydrogen emission, and by the continued accretion onto the central star (albeit at a much lower rate than typical of younger T Tauri stars).

The disk is fainter than the star because its dust only reflects light.

The bulge's stellar inhabitants move at a different rate than stars in the disk, allowing the astronomers to identify them.

Perhaps stars forming more than one dust disk may be the norm in the formative years of a star system.»

The researchers found that the dusty disks around some protostars, as young stars are called, are even bigger than theoretical models have predicted.

The disk extends outward from the star more than 500 times the Earth - Sun distance.

However, the recent discovery by the ALMA radio telescope of a planet - forming disk more than 100 astronomical units from the star HL Tauri, which is younger than the Sun and more massive, suggests that planets can form several hundred astronomical units away from the centre of the system.

The four distinguishing characteristics of the spirals are: (a) they have more orderly, rotational motion than random motion (the rotation refers to the disk as a whole and means that the star orbits are closely confined to a narrow range of angles and are fairly circular); (b) they have some or a lot of gas and dust between the stars; (c) this means they can have new star formation occuring in the disk, particularly in the spiral arms; and (d) they have a spiral structure.

«This result suggests that the environment in the bulge may have been different than the one in the disk, resulting in a different star - formation mechanism,» Calamida said.

«Since many young stars form in multiple systems, we have to realize that the evolution of disks around them and the possible formation of planetary systems can be way more complicated and perturbed than in a simple case like our solar system,» Furlan added.

The more heavy water, the colder the environment was in which the water formed, meaning it likely came from farther away in the disk — or may even pre-date the disk, since it's easier for heavy water to form in the molecular cloud that spawned the star and planetary system than in a dust disk.

So that means the white dwarf in this system probably came from a star slightly more massive than the A star that has the debris disk, maybe a B type star.

Our Sun, much closer to us than any other star, lies in the disk (which is why the disk appears edge - on to us) at a distance of about 28,000 light years from the center.

The observed 100 um fluxes from delta Pav, HR 8501, and 51 Peg agree with the predicted photospheric fluxes, excluding debris disks brighter than Ldust / Lstar ~ 5 x 10 ^ -7 (1 sigma level) around those stars.

Furthermore, the T Tauri star - disk systems within 100 pc of the Sun tend to be older, on average, than the large numbers of star - disk systems that are still found in or near their natal dark clouds.

The tilt has long confounded astronomers because of the way the planets formed: as a spinning cloud slowly collapsing first into a disk and then into objects orbiting a central star, according to Caltech (who can say this better than I can):