Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-06-24
Astronomy and Astrophysics
Astrophysics
20 pages, 4 figures
Scientific paper
10.1086/178024
We present results of observations at 47 and 95 microns from the Kuiper Airborne Observatory of several ``Vega-like'' stars. Spatial cuts and aperture photometry are presented for Beta Pictoris, Fomalhaut, and HD 135344, 139614, 142527, and 169142, four stars that had been suggested to possibly represent more distant examples of the Vega phenomenon by Walker and Wolstencroft. We have modelled the dust around beta Pic and Fomalhaut with a spatially and optically thin disk to determine the constraints our new observations place on the properites of the dust disks that are required to explain the infrared and optical properties of these two stars. For beta Pic we find that models similar to those proposed by Backman, Gillett, and Witteborn can fit our data quite well. For Fomalhaut we find that very different models are required which have much ``blacker'' dust with a much shallower density distribution, surface density proportional to r^{-0.5}$, than for beta Pic. Our observations of the four HD stars are consistent with their being spatially unresolved. Because of their distance, this does not allow us to put any new constraints on their circumstellar shells.
Colome Cecilia
DiFrancesco James
Harvey Paul Michael
Low Frank
Smith Beverly J.
No associations
LandOfFree
Far-Infrared Constraints on Dust Shells Around Vega-like Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Far-Infrared Constraints on Dust Shells Around Vega-like Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Far-Infrared Constraints on Dust Shells Around Vega-like Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-115260