Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-08-29
Astrophys.J.637:L125-L128,2006
Astronomy and Astrophysics
Astrophysics
submitted to ApJL
Scientific paper
10.1086/500584
We study the effects of an annular gap induced by an embedded proto-planet on disk scattered light images and the infrared spectral energy distribution. We find that the outer edge of a gap is brighter in the scattered light images than a similar location in a gap-free disk. The stellar radiation that would have been scattered by material within in the gap is instead scattered by the disk wall at the outer edge of the gap, producing a bright ring surrounding the dark gap in the images. Given sufficient resolution, such gaps can be detected by the presence of this bright ring in scattered light images. A gap in a disk also changes the shape of the SED. Radiation that would have been absorbed by material in the gap is instead reprocessed by the outer gap wall. This leads to a decrease in the SED at wavelengths corresponding to the temperature at the radius of the missing gap material and a corresponding flux increase at longer wavelengths corresponding to the temperature of the outer wall. We note that, unlike an inner hole in the disk, the presence of an annular gap does not change the bolometric IR flux; it simply redistributes the radiation, previously produced by material within the gap, to longer wavelengths. This implies that the changes in the SED generally will be smaller for gaps than holes. Although it will be difficult on the basis of the SED alone to distinguish between the presence of a gap and other physical effects, the level of changes can be sufficiently large to be measurable with current instruments (e.g., Spitzer).
Bjorkman Jon E.
Carciofi Alex C.
Quillen Adam Frank Alice C.
Varniere Peggy
Whitney Barbara A.
No associations
LandOfFree
Observational Properties of Proto-planetary Disk Gaps 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 Observational Properties of Proto-planetary Disk Gaps, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observational Properties of Proto-planetary Disk Gaps will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-20069