Sentences with phrase «of debris discs»

The incidence of debris discs per spectral type is analysed and put into context together with other parameters of the sample, like metallicity, rotation and activity, and age.

The aim of this paper is to provide robust numbers for the incidence of debris discs around FGK stars in the solar neighbourhood.

The incidence of debris discs is similar for active (young) and inactive (old) stars.

There, by exploring a very b... ▽ More We present an analysis of the debris disc around the nearby K2 V star HIP 17439.

A near - infrared interferometric survey of debris disc stars.

An analysis of the debris disc parameters suggests that a decrease might exist of the mean black body radius from the F - type to the K - type stars.

We have resolved the dust - producing planetesimal belt of a debris disc at 100 -LCB- \ mu -RCB- m for the first time.

Abstract: We present an analysis of the debris disc around the nearby K2 V star HIP 17439.

Not exact matches

The researchers modeled the resulting accretion disc — an elliptical disc of stellar debris swirling around the black hole — along with its probable speed, radius, and rate of infall, or speed at which material falls onto the black hole.

The moon is thought to have formed from a disc of debris left when a giant object hit the Earth 4.5 billion years ago, very early in Earth's history.

The origin of these rings remains a mystery, but they may be the result of a collision that created a disc of debris.

Now, both von Hippel and Becklin's teams have found a total of five white dwarfs with such debris discs.

The Moon is thought to have formed from a disc of debris left when a giant object hit Earth 4.5 billion years ago, very early in Earth's history.

This means that the disc may not be leftover debris from the formation of planets after all, and that the star may instead still be forming planets.

Astronomers have long suspected that the young, 12 - million - year - old star hosts a massive planet, since it is surrounded by a dusty disc of debris thought to be created by the collision of rocky bodies and infalling comets.

In 1984, Beta Pictoris became the first star known to be orbited by a dusty disc of debris, called a circumstellar disc.

By using models of how planets shape a debris disc, the team found that «eccentric» versions of the giant planets in the outer solar system could explain the observed properties of the ring.

When planetary atmospheres are formed from a star's disc of dust and gas, they acquire their heavy elements from pockets of ice and debris.

Our inferred debris disc model is able to reproduce G196 - 3B's spectral energy distribution to a satisfactory level of achievement.

Debris discs have been detected at a fractional luminosity level down to several times that of the Edgeworth - Kuiper belt.

However, recent observations have confirmed the presence of a non-negligible amount of cold gas in the circumstellar (CS) debris discs around young main - sequence stars.This cold gas has been suggested to be related to the outgassing of planetesimals and cometary - like objects.

We present the first far - infrared spatially resolved images of these discs and new single - component debris disc models.

The full sample of 177 FGK stars with d < 20 pc proposed for the DUNES su... ▽ More Debris discs are a consequence of the planet formation process and constitute the fingerprints of planetesimal systems.

The majority of these systems are unresolved and analysis of the dust properties is limited by the lack of information regarding the dust location.vThe Herschel DUNES key program is observing 133 nearby, Sun - like stars (< 20 pc, FGK spectral type) in a volume... ▽ More Dusty debris discs around main sequence stars are thought to be the result of continuous collisional grinding of planetesimals in the system.

This hot gas is detected in at least ~ 80 %, of edge - on cold - gas - bearing debris discs, while in only ~ 10 % of the discs seen close to face - on.

Abstract: Cool debris discs are a relic of the planetesimal formation process around their host star, analogous to the solar system's Edgeworth - Kuiper belt.

Abstract: [Abridged] Debris discs around main - sequence stars indicate the presence of larger rocky bodies.

These debris discs commonly display a variety of structural features such as clumps, rings, belts, eccentric distributions and spiral patterns.

High - resolution optical spectra of all currently known cold - gas - bearing debris - disc systems, with the exception of $ \ beta $ Pic and Fomalhaut, have been obtained from different observatories.We have analysed the Ca II H & K and the Na I D lines searching for non-photospheric absorptions of CS origin, usually attributed to cometary - like activity.

Although it can not be excluded that these excesses are produced by coincidental alignment of background galaxies, statistical arguments suggest that at least some of them are true debris discs.

The survey allows us to address some qu... ▽ More Debris discs are a consequence of the planet formation process and constitute the fingerprints of planetesimal systems.

Resolving the cold debris disc around a planet - hosting star: PACS photometric imaging observations of q1 Eri (HD10647, HR506)

As part of the DUNES and DEBRIS surveys, we obtained observations of three debris disc stars, HIP 22263 (HD 30495), HIP 62207 (HD 110897), and HIP 72848 (HD 131511), at far - infrared wavelengths with the Herschel PACS instrDEBRIS surveys, we obtained observations of three debris disc stars, HIP 22263 (HD 30495), HIP 62207 (HD 110897), and HIP 72848 (HD 131511), at far - infrared wavelengths with the Herschel PACS instrdebris disc stars, HIP 22263 (HD 30495), HIP 62207 (HD 110897), and HIP 72848 (HD 131511), at far - infrared wavelengths with the Herschel PACS instrument.

Abstract: Dusty debris discs around main sequence stars are thought to be the result of continuous collisional grinding of planetesimals in the system.

We attribute these infrared excesses to a new class of cold, faint debris discs.

Our models are compared to a suite of observational data for thermal and scattered light emission, ranging from th... ▽ More The spatially resolved AU Mic debris disc is among the most famous and best - studied debris discs.

The disc's accompanying booklet makes a point of playing up the painstakingness of the endeavor, stating that» [t] housands of instances of dirt, debris, scratches, splices, warps, jitter, and flicker were manually removed.»