Spitzer/IRAC Photometry of the η Chameleontis Association

  title={Spitzer/IRAC Photometry of the η Chameleontis Association},
  author={S. Thomas Megeath and Lee Hartmann and Kevin Lee Luhman and Giovanni G. Fazio},
  • S. Thomas Megeath, Lee Hartmann, +1 author Giovanni G. Fazio
  • Published 2005
  • Physics
  • We present IRAC 3.6, 4.5, 5.8, and 8 μm photometry for the 17 A-, K-, and M-type members of the η Chameleontis association. These data show infrared excesses toward six of the 15 K and M stars, indicating the presence of circumstellar disks around 40% of the stars with masses of 0.1-1 M☉. The two A stars show no infrared excesses. The excess emission around one of the stars is comparable to the median excess for classical T Tauri stars in the Taurus association; the remaining five show… CONTINUE READING

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