EPICS: direct imaging of exoplanets with the E-ELT

Kasper, Markus; Beuzit, Jean-Luc; Vérinaud, Christophe; Gratton, R.; Kerber, F.; Yaitskova, Natalia; Boccaletti, A.; Thatte, Niranjan; Schmid, Hans Martin; Keller, Christoph U.; Baudoz, Pierre; Abe, Lyu; Aller-Carpentier, Emmanuel; Antichi, J.; Bonavita, M.; Dohlen, Kjetil; Fedrigo, Enrico; Hanenburg, Hiddo; Hubin, N.; Jäger, R.; Korkiakoski, Visa; Martínez, P.; Mesa, D.; Preis, Olivier; Rabou, Patrick; Roelfsema, R.; Salter, G.; Tecza, M.; Venema, Lars

doi:10.1117/12.856850

Cited by 60 publications

(21 citation statements)

References 7 publications

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“…Upcoming and proposed space and large ground-based telescope designs offer the sensitivity and resolution necessary to begin probing sub-Jovian and, in the case of space missions, terrestrial exoplanets with high contrast direct imaging (Kasper et al 2010;Hinkley et al 2011;Bolcar et al 2015;Dalcanton et al 2015). Recently, protoplanetary discs and massive, young exoplanets have been directly imaged using coronagraphs to suppress starlight to the level where these orbiting bodies can be observed (Marois et al 2008;Kalas et al 2008;Lagrange et al 2009;Marois et al 2010;Andrews et al 2011;Carson et al 2013;Kuzuhara et al 2013;Rameau et al 2013;Oppenheimer et al 2013;Mancini et al 2015;Macintosh et al 2015;Wagner et al 2015;Pueyo et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Polynomial Apodizers for Centrally Obscured Vortex Coronagraphs

Fogarty

Pueyo

Mazoyer

et al. 2017

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Several coronagraph designs have been proposed over the last two decades to directly image exoplanets. Among these designs, vector vortex coronagraphs provide theoretically perfect starlight cancellation along with small inner working angles when deployed on telescopes with unobstructed pupils. However, current and planned space missions and ground-based extremely large telescopes present complex pupil geometries, including large central obscurations caused by secondary mirrors, that prevent vortex coronagraphs from rejecting on-axis sources entirely. Recent solutions combining the vortex phase mask with a ring-apodized pupil have been proposed to circumvent this issue, but provide a limited throughput for vortex charges > 2. We present pupil plane apodizations for charge 2, 4, and 6 vector vortex coronagraphs that compensate for pupil geometries with circularly symmetric central obstructions caused by on-axis secondary mirrors. These apodizations are derived analytically and allow vortex coronagraphs to retain theoretically perfect nulling in the presence of obstructed pupils. For a charge 4 vortex, we design polynomial apodization functions assuming a greyscale apodizing filter that represent a substantial gain in throughput over the ring-apodized vortex coronagraph design, while for a charge 6 vortex, we design polynomial apodized vortex coronagraphs that have 70% total energy throughput for the entire range of central obscuration sizes studied. We propose methods for optimizing apodizations produced with either greyscale apodizing filters or shaped mirrors. We conclude by demonstrating how this design may be combined with apodizations numerically optimized for struts and primary mirror segment gaps to design terrestrial exoplanet imagers for complex pupils.

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Section: Introductionmentioning

confidence: 99%

Polynomial Apodizers for Centrally Obscured Vortex Coronagraphs

Fogarty

Pueyo

Mazoyer

et al. 2017

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“…The EPICS instrument ( Figure 8) combines extreme adaptive optics with the capabilities of two science instruments to extend the limits of planet detection and characterisation beyond anything currently possible or planned (Kasper et al [10]). Predictions of the instrument performance show that planets with masses <10 Mearth at radii of 1AU can be detected and characterised with EPICS.…”

Section: Epics -A Planetary Camera and Spectrographmentioning

confidence: 99%

An overview of the E-ELT instrumentation programme

Ramsay¹,

D’Odorico²,

Casali³

et al. 2010

SPIE Proceedings

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In this paper we present a brief status report on the conceptual designs of the instruments and adaptive optics modules that have been studied for the European Extremely Large Telescope (E-ELT). In parallel with the design study for the 42-m telescope, ESO launched 8 studies devoted to the proposed instruments and 2 for post-focal adaptive optics systems. The studies were carried out in consortia of ESO member state institutes or, in two cases, by ESO in collaboration with external institutes. All studies have now been successfully completed. The result is a powerful set of facility instruments which promise to deliver the scientific goals of the telescope.The aims of the individual studies were broad: to explore the scientific capabilities required to meet the E-ELT science goals, to examine the technical feasibility of the instrument, to understand the requirements placed on the telescope design and to develop a delivery plan. From the perspective of the observatory, these are key inputs to the development of the proposal for the first generation E-ELT instrument suite along with the highest priority science goals and budgetary and technical constraints. We discuss the lessons learned and some of the key results of the process.

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“…With 10-mas class resolution in the near-infrared and unprecedented sensitivity, high contrast imagers and exoplanet science is one of the selling points of these ambitious projects. 37,38 VVCs are good candidate coronagraphs for near-infrared and mid-infrared ELT instruments as shown recently. 6,7,39 As in the 10-meter class telescope case, the LCP-VVC and PC-VVC are mostly adapted to short wavelength up to the near-infrared and SG-VVC are easier to manufacture for longer wavelengths.…”

Section: Ground-based Extremely Large Telescopesmentioning

confidence: 99%

Taking the vector vortex coronagraph to the next level for ground- and space-based exoplanet imaging instruments: review of technology developments in the USA, Japan, and Europe

et al. 2011

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The Vector Vortex Coronagraph (VVC) is one of the most attractive new-generation coronagraphs for ground-and space-based exoplanet imaging/characterization instruments, as recently demonstrated on sky at Palomar and in the laboratory at JPL, and Hokkaido University. Manufacturing technologies for devices covering wavelength ranges from the optical to the mid-infrared, have been maturing quickly. We will review the current status of technology developments supported by NASA in the USA (Jet Propulsion Laboratory-California Institute of Technology, University of Arizona, JDSU and BEAMCo), Europe (University of Liège, Observatoire de ParisMeudon, University of Uppsala) and Japan (Hokkaido University, and Photonics Lattice Inc.), using liquid crystal polymers, subwavelength gratings, and photonics crystals, respectively. We will then browse concrete perspectives for the use of the VVC on upcoming ground-based facilities with or without (extreme) adaptive optics, extremely large ground-based telescopes, and space-based internal coronagraphs.

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EPICS: direct imaging of exoplanets with the E-ELT

Cited by 60 publications

References 7 publications

Polynomial Apodizers for Centrally Obscured Vortex Coronagraphs

Polynomial Apodizers for Centrally Obscured Vortex Coronagraphs

An overview of the E-ELT instrumentation programme

Taking the vector vortex coronagraph to the next level for ground- and space-based exoplanet imaging instruments: review of technology developments in the USA, Japan, and Europe

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