The Formation and Evolution of Planetary Systems (FEPS): Discovery of an Unusual Debris System Associated with HD 12039

  • Hines D
  • Backman D
  • Bouwman J
  • et al.
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Abstract

We report the discovery of a debris system associated with the ∼30 Myr old G3/5V star HD 12039 using Spitzer Space Telescope observations from 3.6-160 μm. An observed infrared excess (LIR/L* = 1 × 10 -4) above the expected photosphere for λ ≳ 14 μm is fit by thermally emitting material with a color temperature of T ∼ 110K, warmer than the majority of debris disks identified to date around Sun-like stars. The object is not detected at 70 μm with a 3 σ upper limit 6 times the expected photospheric flux. The spectrum of the infrared excess can be explained by warm, optically thin material comprised of blackbody-like grains of size ≳7 μm that reside in a belt orbiting the star at 4-6 AU. An alternate model dominated by smaller grains, near the blowout size a ∼ 0.5 μm, located at 30-40 AU is also possible but requires the dust to have been produced recently, since such small grains will be expelled from the system by radiation pressure in approximately a few times 102 yr. © 2006. The American Astronomical Society. All rights reserved.

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APA

Hines, D. C., Backman, D. E., Bouwman, J., Hillenbrand, L. A., Carpenter, J. M., Meyer, M. R., … Su, K. Y. L. (2006). The Formation and Evolution of Planetary Systems (FEPS): Discovery of an Unusual Debris System Associated with HD 12039. The Astrophysical Journal, 638(2), 1070–1079. https://doi.org/10.1086/498929

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