Results 31 to 40 of about 31,620 (294)
Debris Disk Evolution around A Stars [PDF]
The Astrophysical Journal, 2006 We report 24 and/or 70 um measurements of ~160 A-type main-sequence stars using the Multiband Imaging Photometer for Spitzer (MIPS). Their ages range from 5 to 850 Myr based on estimates from the literature (cluster or moving group associations) or from the H-R diagram and isochrones. The thermal infrared excess is identified by comparing the deviation
Su, K. Y. L. +10 more
openaire +2 more sources
Long-term Evolution of Warps in Debris Disks—Application to the Gyr-old System HD 202628
The Astrophysical Journal, 2023 We present the results of N -body simulations meant to reproduce the long-term effects of mutually inclined exoplanets on debris disks, using the HD 202628 system as a proxy.
Madison T. Brady +3 more
doaj +1 more source
The Debris Disk Explorer: a balloon-borne coronagraph for observing debris disks [PDF]
SPIE Proceedings, 2013 13 pages, 8 figures.
Roberts, Lewis C., Jr. +11 more
openaire +3 more sources
THE DEBRIS DISK AROUND HR 8799 [PDF]
The Astrophysical Journal, 2009 We have obtained a full suite of Spitzer observations to characterize the debris disk around HR 8799 and to explore how its properties are related to the recently discovered set of three massive planets orbiting the star. We distinguish three components to the debris system: (1) warm dust (T ~150 K) orbiting within the innermost planet; (2) a broad ...
Su, K. Y. L. +8 more
openaire +2 more sources
The debris disk – terrestrial planet connection [PDF]
Proceedings of the International Astronomical Union, 2010 AbstractThe eccentric orbits of the known extrasolar giant planets provide evidence that most planet-forming environments undergo violent dynamical instabilities. Here, we numerically simulate the impact of giant planet instabilities on planetary systems as a whole.
Raymond, Sean N. +7 more
openaire +3 more sources
A Spitzer view of protoplanetary disks in the gamma Velorum cluster [PDF]
, 2008 We present new Spitzer Space Telescope observations of stars in the young ~5 Myr gamma Velorum stellar cluster. Combining optical and 2MASS photometry, we have selected 579 stars as candidate members of the cluster.
Baraffe I. +13 more
core +2 more sources
THE COLLISIONAL EVOLUTION OF DEBRIS DISKS [PDF]
The Astrophysical Journal, 2013 We explore the collisional decay of disk mass and infrared emission in debris disks. With models, we show that the rate of the decay varies throughout the evolution of the disks, increasing its rate up to a certain point, which is followed by a leveling off to a slower value. The total disk mass falls off ~ t^-0.35 at its fastest point (where t is time)
Gaspar, Andras +2 more
openaire +2 more sources
Discovery of molecular gas around HD 131835 in an APEX molecular line survey of bright debris disks [PDF]
, 2015 Debris disks are considered to be gas-poor, but recent observations revealed molecular or atomic gas in several 10-40 Myr old systems. We used the APEX and IRAM 30m radiotelescopes to search for CO gas in 20 bright debris disks.
Balog, Z. +13 more
core +2 more sources
Numerical Modeling of Dusty Debris Disks
The Astrophysical Journal, 2005 Infrared and submillimeter observations of nearby Vega-like stars have revealed a number of clumpy, asymmetric dust debris disks. Previous studies using semianalytical and numerical methods have suggested planetary companions of various mass as the likely cause of most examples of disk asymmetry.
Deller, Adam T., Maddison, Sarah T.
openaire +3 more sources
Planetesimals in Debris Disks [PDF]
, 2017 Planetesimals form in gas-rich protoplanetary disks around young stars. However, protoplanetary disks fade in about 10 Myr. The planetesimals (and also many of the planets) left behind are too dim to study directly. Fortunately, collisions between planetesimals produce dusty debris disks.
Youdin, Andrew N., Rieke, George H.
openaire +2 more sources