The disk fractions of brown dwarfs in ic 348 and chamaeleon I
Oct, 2005
6 pages
Published in:
- Astrophys.J.Lett. 631 (2005) L69-L72
e-Print:
- astro-ph/0510664 [astro-ph]
DOI:
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Abstract: (arXiv)
Using the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope, we have obtained mid-infrared photometry for 25 and 18 low-mass members of the IC 348 and Chamaeleon I star-forming clusters, respectively (>M6, M<=0.08 Msun). We find that 42+/-13% and 50+/-17% of the two samples exhibit excess emission indicative of circumstellar disks. In comparison, the disk fractions for stellar members of these clusters are 33+/-4% and 45+/-7% (M0-M6, 0.7 Msun>=M>=0.1 Msun). The similarity of the disk fractions of stars and brown dwarfs is consistent with a common formation mechanism and indicates that the raw materials for planet formation are available around brown dwarfs as often as around stars.- ACCRETION DISKS
- PLANETARY SYSTEMS
- PROTOPLANETARY DISKS
- STARS FORMATION
- STARS LOW-MASS
- STARS PRE-MAIN SEQUENCE
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