Binarity as a key factor in protoplanetary disk evolution : Spitzer disk census of the η chamaeleontis cluster

  title={Binarity as a key factor in protoplanetary disk evolution : Spitzer disk census of the $\eta$ chamaeleontis cluster},
  author={Jeroen Bouwman and Warrick A. Lawson and Carsten Dominik and Eric D. Feigelson and Th. Henning and A. Tielens and Laurens B.F.M. Waters},
  journal={The Astrophysical Journal},
The formation of planets is directly linked to the evolution of the circumstellar (CS) disk from which they are born. The dissipation timescales of CS disks are therefore of direct astrophysical importance in evaluating the time available for planet formation. We employ Spitzer Space Telescope spectra to complete the CS disk census for the late-type members of the similar or equal to 8 Myr old eta Chamaeleontis star cluster. Of the 15 K- and M-type members, eight show excess emission. We find… 

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