IRAC Imaging of the Hyades

Details IRAC Imaging of the Hyades IRAC Imaging of the Hyades

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop...42f&link_type=abstract

Spitzer Proposal ID #42

Computer Science

Scientific paper

Imaging in all four IRAC bands will be obtained for members of the Hyades and Pleiades clusters ranging in mass from the top of the main sequence to the faintest known cluster members, using the "cluster" mode. One goal of the observations will be to define the single-star main sequence in the four IRAC bands at (a) solar metallicity and age ~ 100 Myr (i.e. members of the Pleiades) and (b) at [Fe/H] ~ +0.14 and age ~ 600 Myr (i.e. members of the Hyades). In the Pleiades,this will include obtaining IRAC photometry for most of the known or proposed sub-stellar members of the cluster. Comparison of the IRAC colors for the sub-stellar Pleiades members to older VLM stars (and to very young, sub-stellar objects identified in star-forming regions) will help to empirically establish the gravity sensitivity of the IRAC colors at very low masses. A second goal will be to search for previously unknown, very low mass members of the cluster, either as companions to the targeted members or as "free-floating" cluster members that happen to be located near the targeted members.

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