Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-07-23
Astronomy and Astrophysics
Astrophysics
16 pages, 8 figures; accepted for publication in ApJ
Scientific paper
10.1086/592035
With only six known examples, M-dwarf debris disks are rare, even though M dwarfs constitute the majority of stars in the Galaxy. After finding a new M dwarf debris disk in a shallow mid-infrared observation of NGC 2547, we present a considerably deeper Spitzer-MIPS image of the region, with a maximum exposure time of 15 minutes per pixel. Among sources selected from a previously published membership list, we identify nine new M dwarfs with excess emission at 24 micron tracing warm material close to the snow line of these stars, at orbital radii of less than 1 AU. We argue that these are likely debris disks, suggesting that planet formation is under way in these systems. Interestingly, the estimated excess fraction of M stars appears to be higher than that of G and K stars in our sample.
Forbrich Jan
Lada Charles J.
Muench August A.
Teixeira Paula S.
No associations
LandOfFree
New M dwarf debris disk candidates in NGC 2547 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 New M dwarf debris disk candidates in NGC 2547, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New M dwarf debris disk candidates in NGC 2547 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-500