Vol 11, No 3

Near-infrared imaging survey of faint companions around young dwarfs in the Pleiades cluster

Yoichi Itoh, Yumiko Oasa, Hitoshi Funayama, Masahiko Hayashi, Misato Fukagawa, Toshio Hashiguchi, Thayne Currie


Abstract We conducted a near-infrared imaging survey of 11 young dwarfs in the Pleiades cluster using the Subaru Telescope and the near-infrared coronagraph imager. We found ten faint point sources, with magnitudes as faint as 20 mag in the K-band, with around seven dwarfs. Comparison with the Spitzer archive images revealed that a pair of the faint sources around V 1171 Tau is very red in infrared wavelengths, which indicates very low-mass young stellar objects. However, the results of our follow-up proper motion measurements implied that the central star and the faint sources do not share common proper motions, suggesting that they are not physically associated.


Keywords planetary systems: formation — techniques: high angular resolution

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