Results 111 to 120 of about 7,087 (197)

Warm Debris Disks: Where Is Their Dust and Why?

, 2003
The few Vega-type stars whose dusty debris disks have been resolved show this dust to lie in cool Kuiper belt-like rings. However, roughly half of all debris disk candidates exhibit little or no cool dust, since their dust emission peaks at about 25 μm ...
M. C. Wyatt
core   +1 more source

A Data-driven Search For Mid-infrared Excesses Among Five Million Main-sequence FGK Stars

The Astronomical Journal
Stellar infrared excesses can indicate various phenomena of interest, from protoplanetary disks to debris disks, or (more speculatively) techno-signatures along the lines of Dyson spheres.
Gabriella Contardo, David W. Hogg
doaj   +1 more source

Reading the Signatures of Extrasolar Planets in Debris Disks

, 2009
An extrasolar planet sculpts the famous debris dish around Fomalhaut; probably ma ny other debris disks contain planets that we could locate if only we could better recognize their signatures in the dust that surrounds them.
Kuchner, Marc J.
core  

Disk Radii and Grain Sizes in Herschel-resolved Debris Disks

, 2014
The radii of debris disks and the sizes of their dust grains are tracers of the formation mechanisms and physical processes operating in these systems. We use a sample of 34 debris disks spatially resolved in various Herschel programs to constrain them ...
Montesinos, B., Moór, Attila, Marshall, J. P., Eiroa, C., Pawellek, N., Ábrahám, Péter, Bryden, G., Krivov, A. V.   +7 more
core   +1 more source

Debris disks as seen by Herschel/DUNES

, 2012
peer reviewedThe far-infrared excesses produced by debris disks are common features of stellar systems. These disks are thought to contain solids ranging from micron-sized dust to planetesimals.
Bayo, A., J.P. Marshall, del Burgo, C., A.V. Krivov, J. Lebreton, Letawe, G., Lebreton, J., G.L. Pilbratt, C. Eiroa, K. Stapelfeldt, W. Danchi, Löhne, T., Montesinos, B., Stapelfeldt, K., T. Löhne, Eiroa, C., J.‐C. Augereau, Magain, Pierre, J. Maldonado, Pilbratt, G.L., Pilbratt, G. L., Absil, O., White, G.J., G.J. White, G. Letawe, P. Thébault, Marshall, J. P., S. Wolf, White, G. J., O. Absil, Absil, Olivier, Krivov, A. V., Magain, P., Mora, A., Danchi, W., Thébault, P., Krivov, A.V., B. Montesinos, S. Ertel, Marshall, J.P., Wolf, S., C. del Burgo, Ertel, S., Augereau, J.-C., P. Magain, Maldonado, J., A. Bayo, A. Mora   +47 more
core   +1 more source

Three-dimensional Simulations of the Magnetorotational Instability in Eccentric Disks

The Astrophysical Journal
Previously we demonstrated that the magnetorotational instability (MRI) grows vigorously in eccentric disks, much as it does in circular disks, and we investigated the nonlinear development of the eccentric MRI without vertical gravity.
Chi-Ho Chan, Tsvi Piran, Julian H. Krolik   +2 more
doaj   +1 more source

Searching for gas in debris disks

, 2020
A debris disk is commonly described as a second generation circumstellar disk com- posed of dust grains, planetesimals and possibly already formed giant planets. It was long thought that debris disks were systems fully depleted of gas, but in the last few years the presence of gas has been detected in a increasing number of them.
openaire   +2 more sources

Observing planetary gaps in the gas of debris disks

International audienceRecent ALMA observations discovered consequent amounts (i.e., up to a few 10−1 M⊙) of CO gas in debris disks that were expected to be gas-free.
Bergez-Casalou, C., C. Bergez-Casalou, Kral, Q., Q. Kral   +3 more
core   +1 more source

Linear Thermal Instability of a Condensing Gas–Particle Mixture, with Possible Application to Chondrites and Planetesimals

The Astrophysical Journal
We study the stability of a hot saturated gas coexisting with condensed particles in an optically thin medium. Such a situation may be obtained downstream of a shock, at condensation fronts, or in vaporizing impacts. We show that the gas–particle mixture
Kecheng Stephon Qian, Eugene Chiang
doaj   +1 more source

Debris disks from an astronomical and an astrobiological viewpoint

, 2013
In this licentiate thesis, I consider debris disks from an observational, astronomical viewpoint, but also discuss a potential astrobiological application.
Cataldi, Gianni
core