19 August 2009 Detecting and characterizing exoplanets with a 1.4-m space telescope: the Pupil mapping Exoplanet Coronagraphic Observer (PECO)
Author Affiliations +
Abstract
The Pupil-mapping Exoplanet Coronagraphic Observer (PECO) mission concept uses a coronagraphic 1.4-m space-based telescope to both image and characterize extra-solar planetary systems at optical wavelengths. PECO delivers 10-10 contrast at 2 λ/D separation (0.15") using a high-performance Phase-Induced Amplitude Apodization (PIAA) coronagraph which remaps the telescope pupil and uses nearly all of the light coming into the aperture. For exoplanet characterization, PECO acquires narrow field images simultaneously in 16 spectral bands over wavelengths from 0.4 to 0.9 μm, utilizing all available photons for maximum wavefront sensing and sensitivity for imaging and spectroscopy. The optical design is optimized for simultaneous low-resolution spectral characterization of both planets and dust disks using a moderate-sized telescope. PECO will image the habitable zones of about 20 known F, G, K stars at a spectral resolution of R≈15 with sensitivity sufficient to detect and characterize Earth-like planets and to map dust disks to within a fraction of our own zodiacal dust cloud brightness. The PIAA coronagraph adopted for PECO reduces the required telescope diameter by a factor of two compared with other coronagraph approaches that were considered for Terrestrial Planet Finder Coronagraph Flight Baseline 1, and would therefore also be highly valuable for larger telescope diameters. We report on ongoing laboratory activities to develop and mature key PECO technologies, as well as detailed analysis aimed at verifying PECO's wavefront and pointing stability requirement can be met without requiring development of new technologies.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Olivier Guyon, Olivier Guyon, James R. P. Angel, James R. P. Angel, Ruslan Belikov, Ruslan Belikov, Robert Egerman, Robert Egerman, Donald Gavel, Donald Gavel, Amir Give'on, Amir Give'on, Thomas Greene, Thomas Greene, Kerri Cahoy, Kerri Cahoy, Brian Kern, Brian Kern, Marie Levine, Marie Levine, Stephen Ridgway, Stephen Ridgway, Stuart Shaklan, Stuart Shaklan, Domenick Tenerelli, Domenick Tenerelli, Robert Vanderbei, Robert Vanderbei, Robert A. Woodruff, Robert A. Woodruff, } "Detecting and characterizing exoplanets with a 1.4-m space telescope: the Pupil mapping Exoplanet Coronagraphic Observer (PECO)", Proc. SPIE 7440, Techniques and Instrumentation for Detection of Exoplanets IV, 74400F (19 August 2009); doi: 10.1117/12.826350; https://doi.org/10.1117/12.826350
PROCEEDINGS
10 PAGES


SHARE
Back to Top