Young, Jupiter-Mass Objects in Ophiuchus

Astrophysics, abstract
astro-ph/0506079

From: Katelyn Allers [view email]

Date: Fri, 3 Jun 2005 15:52:29 GMT   (132kb)

We have used 3.5 to 8 micron data from the Cores to Disks (c2d) Legacy survey
and our own deep IJHKs images of a 0.5 square degree portion of the c2d fields
in Ophiuchus to produce a sample of candidate young objects with probable
masses between 1 and 10 Jupiter masses. The availability of photometry over
whole range where these objects emit allows us to discriminate between young,
extremely low-mass candidates and more massive foreground and background
objects and means our survey will have fewer false positives than existing
near-IR surveys. The sensitive inventory of a star forming cloud from the red
to the mid-IR will allow us to constrain the IMF for these non-clustered star
formation regions to well below the deuterium burning limit. For stars with
fluxes in the broad gap between the 2MASS limits and our limits, our data will
provide information about the photospheres. We will use the Spitzer results in
combination with current disk models to learn about the presence and nature of
circumstellar disks around young brown dwarfs.

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