How ELTs will acquire the first spectra of rocky habitable planets

Olivier Guyon, Frantz Martinache, Eric Cady, Ruslan Belikov, Balasubramanian Kunjithapatham, Daniel Wilson, Christophe Clergeon, Mala Mateen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

20 Scopus citations

Abstract

ELTs will offer angular resolution around 10mas in the near-IR and unprecedented sensitivity. While direct imaging of Earth-like exoplanets around Sun-like stars will stay out of reach of ELTs, we show that habitable planets around nearby M-type main sequence stars can be directly imaged. For about 300 nearby M dwarfs, the angular separation at maximum elongation is at or beyond 1 λ/D in the near-IR for an ELT. The planet to star contrast is 1e-7 to 1e-8, similar to what the upcoming generation of Extreme-AO systems will achieve on 8-m telescopes, and the potential planets are sufficiently bright for near-IR spectroscopy. We show that the technological solutions required to achieve this goal exist. For example, the PIAACMC coronagraph can deliver full starlight rejection, 100% throughput and sub-λ/D IWA for the EELT, GMT and TMT pupils. A closely related coronagraph is part of SCExAO on Subaru. We conclude that large ground-based telescopes will acquire the first high quality spectra of habitable planets orbiting M-type stars, while future space mission(s) will later target F-G-K type stars.

Original languageEnglish (US)
Title of host publicationAdaptive Optics Systems III
DOIs
StatePublished - Dec 1 2012
EventAdaptive Optics Systems III - Amsterdam, Netherlands
Duration: Jul 1 2012Jul 6 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8447
ISSN (Print)0277-786X

Other

OtherAdaptive Optics Systems III
CountryNetherlands
CityAmsterdam
Period7/1/127/6/12

Keywords

  • Coronagraphy
  • Exoplanets
  • Extreme-AO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Guyon, O., Martinache, F., Cady, E., Belikov, R., Kunjithapatham, B., Wilson, D., Clergeon, C., & Mateen, M. (2012). How ELTs will acquire the first spectra of rocky habitable planets. In Adaptive Optics Systems III [84471X] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8447). https://doi.org/10.1117/12.927181