Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1217m&link_type=abstract
American Astronomical Society, AAS Meeting #211, #12.17; Bulletin of the American Astronomical Society, Vol. 39, p.753
Astronomy and Astrophysics
Astronomy
Scientific paper
We report the initial results of a search for transition disk candidates, objects with colors intermediate between those of stars and class II objects, in the 30 square degree region covered by the Taurus I Spitzer Legacy survey. We find that the [3.6]-[24] vs [3.6]-[8.0] color plane accentuates the difference between photospheric sources and those with excess, and clearly highlights a sample of objects that have unusual colors. These objects, defined by 1.5 < [3.6]-[24] < 5.5 and [3.6]-[8.0] < 2, include T Tauri stars, YSO's, and brown dwarfs, in addition to a small sample of galaxies. A number of the T Tauri stars have previously been observed with IRS; by far the majority of these are classified as the more evolved class D and E objects by Furlan et al. A large fraction of the known T Tauri stars are in close binary systems, raising the possibility that the companion may in part be responsible for the unusual system colors. In at least one system, however, this does not appear to be the case.
Audard Marc
Brooke Timothy
Carey Sean
Evans Nick
Fukagawa Misato
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