The Incidence of Debris Disks at 24 μm and 670 Myr

Details The Incidence of Debris Disks at 24 μm and 670 Myr The Incidence of Debris Disks at 24 μm and 670 Myr

2012-02-29

arxiv.org/abs/1203.0027v1

ApJ (2012) 750, 98

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

26 pages, 3 figures, accepted for publication in ApJ

Scientific paper

10.1088/0004-637X/750/2/98

We use Spitzer Space Telescope 24 {\mu}m data to search for debris disks among 122 AFGKM stars from the \sim 670 Myr clusters Hyades, Coma Ber, and Praesepe, utilizing a number of advances in data reduction and determining the intrinsic colors of main sequence stars. For our sample, the 1{\sigma} dispersion about the main sequence V-K, K-[24] locus is approximately 3.1%. We identify seven debris disks at 10% or more (\geq 3{\sigma} confidence level) above the expected K-[24] for purely photospheric emission. The incidence of excesses of 10% or greater in our sample at this age is 5.7 +3.1/-1.7%. Combining with results from the literature, the rate is 7.8 +4.2/-2.1% for early- type (B9 - F4) stars and 2.7 +3.3/-1.7% for solar-like (F5 - K9) stars. Our primary sample has strict criteria for inclusion to allow comparison with other work; when we relax these criteria, three additional debris disks are detected. They are all around stars of solar-like type and hence reinforce our conclusion that disks around such stars are still relatively common at 670 Myr and are similar to the rate around early-type stars. The apparently small difference in decay rates between early-type and solar-like stars is inconsistent with the first order theoretical predictions that the later type stellar disks would decay an order of magnitude more quickly than the earlier type ones.

Affiliated with

Also associated with

No associations

Rating

The Incidence of Debris Disks at 24 μm and 670 Myr 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 Incidence of Debris Disks at 24 μm and 670 Myr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Incidence of Debris Disks at 24 μm and 670 Myr will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-345570