Sentences with phrase «debris discs»
"Debris discs" refers to rings of leftover rocks and dust that orbit around young stars in outer space. These discs are formed from the planetary material that didn't come together to form planets, and they can provide scientists with valuable information about the early stages of star and planet formation. Full definition
The incidence of debris discs is similar for active (young) and inactive (old) stars.
arxiv.org
In our models we consider collisions, direct radiation pressure, and drag forces, i.e. the actual physical processes operating in debris discs.
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.
Using the HIgh Precision Polarimetric Instrument (H... ▽ More Debris discs are typically revealed through excess emission at infrared wavelengths.
Our inferred debris disc model is able to reproduce G196 - 3B's spectral energy distribution to a satisfactory level of achievement.
The Herschel Open Time Key Programmes «DUst around NEarby Stars» (DUNES) and «Disc Emission via a Bias - free Reconnaissance in the Infrared / Submilli... ▽ More Cool debris discs are a relic of the planetesimal formation process around their host star, analogous to the solar system's Edgeworth - Kuiper belt.
A near - infrared interferometric survey of debris disc stars.
Now, both von Hippel and Becklin's teams have found a total of five white dwarfs with such debris discs.
Finally, in the wide SCUBA - 2 field - of - view we identify another candidate debris disc system that is potentially the largest yet discovered.
We present the first far - infrared spatially resolved images of these discs and new single - component debris disc models.
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.
The aim of this paper is to provide robust numbers for the incidence of debris discs around FGK stars in the solar neighbourhood.
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 image shows a spiral - like structure which we think is related to collisions between dust grains in the debris 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.
«Over the next few years, I'm optimistic that GPI will reveal many more debris discs and young planets.
We explored an alternative scenario by simulating protoplanetary and debris discs around G196 - 3B, which is an L3 young brown dwarf with a mass... ▽ More The origin of the very red optical and infrared colours of intermediate - age ($ \ sim $ 10 - 500 Myr) L - type dwarfs remains unknown.
Abstract: Debris discs are typically revealed through excess emission at infrared wavelengths.
Debris discs have been detected at a fractional luminosity level down to several times that of the Edgeworth - Kuiper belt.
There, by exploring a very b... ▽ More We present an analysis of the debris disc around the nearby K2 V star HIP 17439.
A few systems also host imaged planets, whose orbits at tens of AU are aligned with the debris discs, contrary to what might be expected in models where external perturbers induce tilts.
Abstract: The spatially resolved AU Mic debris disc is among the most famous and best - studied debris discs.
We have resolved the dust - producing planetesimal belt of a debris disc at 100 -LCB- \ mu -RCB- m for the first time.
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.
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.