M. Kasper

Cascade adaptive optics with a second stage based on a Zernike wavefront sensor for exoplanet observations

M. N'Diaye, A. Vigan, B. Engler, M. Kasper et autres

Context . Over the past decade, the high-contrast observation of disks and gas giant planets around nearby stars has been made possible with ground-based instruments using extreme adaptive optics (XAO). These facilities produce images with a Strehl ratio higher than 90% in …

Detecting life outside our solar system with a large high-contrast-imaging mission

I. A. G. Snellen, Frans Snik, Matthew A. Kenworthy, Simon Albrecht et autres

Abstract In this White Paper, which was submitted in response to the European Space Agency (ESA) Voyage 2050 Call, we recommend the ESA plays a proactive role in developing a global collaborative effort to construct a large high-contrast imaging space telescope, e.g. …

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Post-conjunction detection of β Pictoris b with VLT/SPHERE

A.-M. Lagrange, A. Boccaletti, M. Langlois, G. Chauvin et autres

Context. With an orbital distance comparable to that of Saturn in the solar system, β Pictoris b is the closest (semi-major axis ≃9 au) exoplanet that has been imaged to orbit a star. Thus it offers unique opportunities for detailed studies of …

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Origin of the asymmetry of the wind driven halo observed in high-contrast images

F. Cantalloube, Emiel H. Por, Kjetil Dohlen, Jean-François Sauvage et autres

The latest generation of high-contrast instruments dedicated to exoplanets and circumstellar disk imaging are equipped with extreme adaptive optics and coronagraphs to reach contrasts of up to 10−4 at a few tenths of arcseconds in the near-infrared. The resulting image shows faint …

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Blazing a Trail: Towards Imaging Super-Earths from the Ground and Space

Markus R. Meyer, Sascha P. Quanz, M. Kasper, Olivier Guyon et autres

Status of the Scorpion Planet Survey: Establishing the Frequency of HR8799b-Like Planets

Kevin Wagner, A. Daniel, M. Kasper

NIX, the imager for ERIS: the AO instrument for the VLT

D. Pearson, W. D. Taylor, R. Davies, Mike MacIntosh et autres

ERIS will be the next-generation AO facility on the VLT, combining the heritage of NACO imaging, with the spectroscopic capabilities of an upgraded SINFONI. Here we report on the all-new NIX imager that will deliver diffraction-limited imaging from the J to M …

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The ERIS adaptive optics system

Armando Riccardi, Simone Esposito, Guido Agapito, J. Antichi et autres

ERIS is the new AO instrument for VLT-UT4 led by a Consortium of Max-Planck Institut fuer Extraterrestrische Physik, UK-ATC, ETH-Zurich, ESO and INAF. The ERIS AO system provides NGS mode to deliver high contrast correction and LGS mode to extend high Strehl …

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The SPHERE view of the planet-forming disk around HD 100546

A. Garufi, Sascha P. Quanz, H. M. Schmid, Gijs D. Mulders et autres

Context. The mechanisms governing planet formation are not fully understood. A new era of high-resolution imaging of protoplanetary disks has recently started, thanks to new instruments such as SPHERE, GPI, and ALMA. The planet formation process can now be directly studied by …

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SPHERE extreme AO system On-sky operation, final performance and future improvements

Thierry Fusco, Jean-François Sauvage, David Mouilelt, Jean-Luc Beuzit et autres

The SPHERE (Spectro-Polarimetric High-contrast Exoplanet Research) instrument aims at detecting extremely faintsources (giant extrasolar planets) in the vicinity of bright stars1. Such a challenging goal requires the use of a very-highorderperformance Adaptive Optics [AO] system feeding the scientific instruments with a quasi-perfect …

Roadmap for PCS, the Planetary Camera and Spectrograph for the E-ELT

M. Kasper, Christophe Vérinaud, Dimitri Mawet

Presently, dedicated instruments at large telescopes (SPHERE for the VLT, GPI for Gemini) are \nabout to discover and explore self-luminous giant planets by direct imaging and spectroscopy. The next \ngeneration of 30m-40m ground-based telescopes, the Extremely Large Telescopes, have the potential to …

Halftoning for high-contrast imaging

P. Martinez, C. Dorrer, E. Aller Carpentier, M. Kasper et autres

High-contrast instruments, such as SPHERE (upcoming planet finder instrument for the ESO-VLT), or EPICS (planet hunter project for the future E-ELT), will require customized components with spatially varying transmission (e.g. coronagraphs, optical components that reduce the contrast between a companion and its …

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