Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-12-22
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
19 pages, 3 figures, accepted by ApJ
Scientific paper
With the launch of the Wide-Field Infrared Survey Explorer (WISE), a new era of detecting planetary debris around white dwarfs has begun with the WISE InfraRed Excesses around Degenerates (WIRED) Survey. The WIRED Survey will be sensitive to substellar objects and dusty debris around white dwarfs out to distances exceeding 100 pc, well beyond the completeness level of local WDs and covering a large fraction of known WDs detected with the SDSS DR4 white dwarf catalogue. In this paper we report an initial result of the WIRED survey, the detection of the heavily polluted hydrogen white dwarf (spectral type DAZ) GALEX J193156.8+011745 at 3.35 and 4.6 \micron. We find that the excess is consistent with either a narrow dusty ring with an inner radius of 29 $R_{\rm WD}$, outer radius of 40 $R_{\rm WD}$, and a face-on inclination, or a disk with an inclination of 70$^\circ$, an inner radius of 23 $R_{\rm WD}$, and an outer radius of 80 $R_{\rm WD}$. We also report initial optical spectroscopic monitoring of several metal lines present in the photosphere and find no variability in the line strengths or radial velocities of the lines. We rule out all but planetary mass companions to GALEX1931 out to 0.5 AU.
Cohen Martin
Debes John H.
Griffith Roger L.
Hoard Donald Wayne
Kilic Mukremin
No associations
LandOfFree
The WIRED Survey I: A Bright IR Excess Due to Dust Around the Heavily Polluted White Dwarf GALEX J193156.8+011745 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 The WIRED Survey I: A Bright IR Excess Due to Dust Around the Heavily Polluted White Dwarf GALEX J193156.8+011745, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The WIRED Survey I: A Bright IR Excess Due to Dust Around the Heavily Polluted White Dwarf GALEX J193156.8+011745 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-581442