|
We present results of a Spitzer survey of nearby young embedded
clusters and groups, including those in the Ophiuchus, Corona Australis,
Chamaeleon I, Lupus III, and Taurus molecular clouds. We use IRAC, MIPS,
and ground-based near-IR photometry to determine the frequency of disks in
these clusters. Through comparison of observed 1-24 micron colors with
predicted colors from models of disks and infalling envelopes, we discuss
the relative fractions of sources with protostellar envelopes, accretion
disks, and large inner disk holes. Although Spitzer is unable to
spatially resolve circumstellar disks in these clusters, it is producing
the most sensitive and complete list of disks around young stars within
150 pc, which are being followed-up with interferometric studies.
|
