Physics
Scientific paper
Apr 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sptz.prop60160m&link_type=abstract
Spitzer Proposal ID #60160
Physics
Scientific paper
We propose to obtain repeated 3.6 and 4.5 micron observations of IC 348 focusing on young stellar objects that show evidence of unique and unusual mid-infrared variability. Previous Spitzer observations have found variations in the mid-infrared flux in as little as a day along with a strong wavelength dependence. We focus on a handful of T Tauri stars that exhibit spectral energy distributions similar to transition disks and two class I stars that show the largest 24 micron variability of any young stellar object in the cluster. In the T Tauri disks the variability may be related to a change in the scale height of the inner edge of this disk. Repeated observations covering a range of timescales from hours to weeks will help to constrain the physical mechanism leading to this variable scale height. For the class I stars, our proposed observations will help to constrain the details of the envelope/disk structure and variable accretionE These data will provide an essential tool for understanding stellar mass build up, accretion and planet formation.
Balog Zoltan
Flaherty Kevin
Gutermuth Robert
Herbst William
Megeath Thomas S.
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