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Proceedings Article

Direct imaging of exoEarths embedded in clumpy debris disks

[+] Author Affiliations
D. Defrère

Max-Planck-Institut für Radioastronomie (Germany)

C. Stark

Carnegie Institution of Washington (United States)

K. Cahoy, I. Beerer

Massachusetts Institute of Technology (United States)

Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 84420M (August 22, 2012); doi:10.1117/12.926324
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From Conference Volume 8442

  • Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave
  • Mark C. Clampin; Giovanni G. Fazio; Howard A. MacEwen; Jacobus M. Oschmann
  • Amsterdam, Netherlands | July 01, 2012

abstract

The inner solar system, where the terrestrial planets formed and evolve, is populated by small grains of dust produced by collisions of asteroids and outgassing comets. At visible and infrared wavelengths, this dust cloud is in fact the most luminous component in the solar system after the Sun itself and the Earth may appear similar to a clump of zodiacal dust to an external observer. Hence, the presence of large amounts of dust in the habitable zone around nearby main-sequence stars is considered as a major hurdle toward the direct imaging of exoEarths with future dedicated space-based telescopes. In that context, we address in this paper the detectability of exoEarths embedded in structured debris disks with future space-based visible coronagraphs and mid-infrared interferometers. Using a collisional grooming algorithm, we produce models of dust clouds that simultaneously and self-consistently handle dust grain dynamics, including resonant interactions with planets, and grain-grain collisions. Considering various viewing geometries, we also derive limiting dust densities that can be tolerated around nearby main-sequence stars in order to ensure the characterization of exoEarths with future direct imaging missions. © (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

D. Defrère ; C. Stark ; K. Cahoy and I. Beerer
" Direct imaging of exoEarths embedded in clumpy debris disks ", Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 84420M (August 22, 2012); doi:10.1117/12.926324; http://dx.doi.org/10.1117/12.926324


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