Franck Marchis

Keck observations of eruptions on Io in 2003–2005

Published in Icarus

We report observations of four energetic volcanic eruptions on Io: at Tupan Patera on UT 8 March 2003; Tung Yo Patera on UT 28 May 2004; Sui Jen Patera on UT 30 May 2004; and south of Babbar Patera on UT 31 May 2005. The Tung Yo, Sui Jen and south of Babbar Paterae eruptions are in locations where no activity had been seen before. Our observations ...

EXTREME AO OBSERVATIONS OF TWO TRIPLE ASTEROID SYSTEMS WITH SPHERE

Published in The Astrophysical Journal

Asteroids and the James Webb Space Telescope

Published in Publications of the Astronomical Society of the Pacific

The James Webb Space Telescope (JWST) provides the opportunity for ground- breaking observations of asteroids. It covers wavelength regions that are unavailable from the ground and does so with unprecedented sensitivity. The main belt and Trojan asteroids are all observable at some point in the JWST lifetime. We present an overview of the capabilit...

Multi-spots with MEMS deformable mirrors for laser guide star in astronomy

THE FIRST H-BAND SPECTRUM OF THE MASSIVE GAS GIANT PLANET BETA PICTORIS b WITH THE GEMINI PLANET IMAGER

Using the recently installed Gemini Planet Imager (GPI), we have taken the first H-band spectrum of the planetary companion to the nearby young star beta Pictoris. GPI is designed to image and provide low-resolution spectra of Jupiter sized, self-luminous planetary companions around young nearby stars. These observations were taken covering the H-b...

The Gemini planet imager: first light and commissioning

The Gemini Planet Imager (GPI) is a facility extreme-AO high-contrast instrument– optimized solely for study of faint companions–on the Gemini telescope. It combines a high- order MEMS AO system (1493 active actuators), an apodized pupil Lyot coronagraph, a high- accuracy IR post-coronagraph wavefront sensor, and a near-infrared integral field spec...

Gemini planet imager observational calibrations iii: Empirical measurement methods and applications of high-resolution m...

The newly commissioned Gemini Planet Imager (GPI) combines extreme adaptive optics, an advanced coronagraph, precision wavefront control and a lenslet-based integral field spectrograph (IFS) to measure the spectra of young extrasolar giant planets between 0.9-2.5 μm. Each GPI detector image, when in spectral model, consists of~ 37,000 microspectra ...

Tiny Moons Around Asteroids

Published in Bulletin Southern California Academy of Sciences