Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-11-07
Astronomy and Astrophysics
Astrophysics
16 pages, 9 figures, Astron & Astrophys. in press
Scientific paper
10.1051/0004-6361:20000075
We present photometric ISO 60 and 170um measurements, complemented by some IRAS data at 60um, of a sample of 84 nearby main-sequence stars of spectral class A, F, G and K in order to determine the incidence of dust disks around such main-sequence stars. Of the stars younger than 400 Myr one in two has a disk; for the older stars this is true for only one in ten. We conclude that most stars arrive on the main sequence surrounded by a disk; this disk then decays in about 400 Myr. Because (i) the dust particles disappear and must be replenished on a much shorter time scale and (ii) the collision of planetesimals is a good source of new dust, we suggest that the rapid decay of the disks is caused by the destruction and escape of planetesimals. We suggest that the dissipation of the disk is related to the heavy bombardment phase in our Solar System. Whether all stars arrive on the main sequence surrounded by a disk cannot be established: some very young stars do not have a disk. And not all stars destroy their disk in a similar way: some stars as old as the Sun still have significant disks.
Bouchet Patrice
Dominik Carsten
Habing Harm J.
Jourdain de Muizon Marie
Kessler Martin F.
No associations
LandOfFree
Incidence and survival of remnant disks around main-sequence 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 Incidence and survival of remnant disks around main-sequence stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Incidence and survival of remnant disks around main-sequence stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-466188