Exoplanet imaging with a phase-induced amplitude apodization coronograph. II. Performance

Frantz Martinache, Olivier Guyon, Eugene A. Pluzhnik, Raphael Galicher, Stephen T. Ridgway

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The phase-induced amplitude apodization coronagraph (PIAAC) uses a lossless achromatic apodization of the telescope pupil to produce a coronagraphic image without compromising the throughput and angular resolution of the telescope. Whereas the principle of the PIAAC concept was discussed in a previous paper, the purpose of this work is to provide an exhaustive analysis of the expected performances of a PIAAC on a 4 m diameter telescope in space. Results presented here are based on realistic simulations of extrasolar terrestrial planets (ETPs) orbiting F, G, K, and M stars within 30 pc of the solar system and take into account the probability distributions of planet phase and angular separation. We show that a quasi-complete detection survey of 100 stars (with six observations per star) would require about 2 days of "open shutter" observing time in the ideal system considered in this work (4 m telescope, 100% throughput). A classical apodizer would require exposure times about 100 times longer than PIAAC on a Sun-Earth system at 10 pc. Small pointing errors and non-monochromatic observing require slight oversizing of the focal plane mask with little impact on the system performance.

Original languageEnglish (US)
Pages (from-to)1129-1137
Number of pages9
JournalAstrophysical Journal
Volume639
Issue number2 I
DOIs
StatePublished - Mar 10 2006
Externally publishedYes

Keywords

  • Planetary systems
  • Techniques: high angular resolution
  • Telescopes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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