Small-angle, high-contrast exoplanet imaging with the L-band AGPM vector vortex coronagraph now offered at the VLT

In November 2012, we installed an L-band annular groove phase mask (AGPM) vector vortex coronagraph (VVC) inside NACO, the adaptive optics camera of ESO’s Very Large Telescope. The mask, made out of diamond subwavelength gratings has been commissioned, science qualified, and is now offered to the community. Here we report ground-breaking on-sky performance levels in terms of contrast, inner working angle, and discovery space. This new practical demonstration of the VVC, coming a few years after Palomar’s and recent record-breaking lab experiments in the visible (E. Serabyn et al. 2013, these proceedings), shows once again that this new-generation coronagraph has reached a high level of maturity.

[1]  B. Macintosh,et al.  Angular Differential Imaging: A Powerful High-Contrast Imaging Technique , 2005, astro-ph/0512335.

[2]  A. Boccaletti,et al.  The Four‐Quadrant Phase Mask Coronagraph. IV. First Light at the Very Large Telescope , 2004 .

[3]  Dimitri Mawet,et al.  Image quality and high contrast improvements on VLT/NACO , 2012, Other Conferences.

[4]  David Mouillet,et al.  NAOS, the first AO system of the VLT: on-sky performance , 2003, SPIE Astronomical Telescopes + Instrumentation.

[5]  P. H. Hauschildt,et al.  Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 209458 , 2003 .

[6]  E. Hatziminaoglou,et al.  Star counts in the Galaxy - Simulating from very deep to very shallow photometric surveys with the TRILEGAL code , 2005, astro-ph/0504047.

[7]  D. Mawet,et al.  Annular Groove Phase Mask Coronagraph , 2005 .

[8]  D. Mawet,et al.  Laboratory demonstration of a mid-infrared AGPM vector vortex coronagraph , 2013, 1304.1180.

[9]  Pontus Forsberg,et al.  Inclined surfaces in diamond: broadband antireflective structures and coupling light through waveguides. , 2013, Optics express.

[10]  Gautam Vasisht,et al.  Project 1640: the world's first ExAO coronagraphic hyperspectral imager for comparative planetary science , 2012, Other Conferences.

[11]  Julien H. Girard,et al.  High angular resolution detection of β Pictoris b at 2.18 μm , 2011 .

[12]  Malcolm Smith,et al.  The Gemini Planet Imager: integration and status , 2012, Other Conferences.

[13]  Frantz Martinache,et al.  The Subaru coronagraphic extreme AO project: first observations , 2012, Other Conferences.

[14]  D. Mawet,et al.  Coronagraphic imaging of three weak-line T Tauri stars: evidence of planetary formation around PDS 70 , 2006 .

[15]  Julien H. Girard,et al.  Gearing up the SPHERE , 2012 .

[16]  Peter Hauschildt,et al.  Evolutionary models for solar metallicity low - mass stars: Mass - magnitude relationships and color - magnitude diagrams , 1998 .

[17]  Julien H. Girard,et al.  CORONAGRAPHIC OBSERVATIONS OF FOMALHAUT AT SOLAR SYSTEM SCALES , 2012, 1212.1459.

[18]  Adam Burrows,et al.  SPECTRAL AND PHOTOMETRIC DIAGNOSTICS OF GIANT PLANET FORMATION SCENARIOS , 2011, 1108.5172.

[19]  C. Marois,et al.  Confidence Level and Sensitivity Limits in High-Contrast Imaging , 2007, 0709.3548.

[20]  David Mouillet,et al.  Morphology of the very inclined debris disk around HD 32297 , 2012, 1206.6334.

[21]  Jean-Pierre Véran,et al.  Exoplanet imaging with LOCI processing: photometry and astrometry with the new SOSIE pipeline , 2010, Astronomical Telescopes + Instrumentation.

[22]  John Asher Johnson,et al.  ESTIMATES OF THE PLANET YIELD FROM GROUND-BASED HIGH-CONTRAST IMAGING OBSERVATIONS AS A FUNCTION OF STELLAR MASS , 2011, 1103.4910.

[23]  A. Vigan,et al.  The International Deep Planet Survey - I. The frequency of wide-orbit massive planets around A-stars , 2012, 1206.4048.

[24]  Markus Janson,et al.  A novel L-band imaging search for giant planets in the Tucana and β Pictoris moving groups , 2007, 0706.0095.

[25]  Anne-Marie Lagrange,et al.  NAOS-CONICA first on sky results in a variety of observing modes , 2003, SPIE Astronomical Telescopes + Instrumentation.

[26]  R. Soummer,et al.  DETECTION AND CHARACTERIZATION OF EXOPLANETS AND DISKS USING PROJECTIONS ON KARHUNEN–LOÈVE EIGENIMAGES , 2012, 1207.4197.

[27]  Pontus Forsberg,et al.  High aspect ratio optical gratings in diamond , 2013 .

[28]  B. Oppenheimer,et al.  The Gemini Deep Planet Survey , 2007, 0705.4290.

[29]  Mark S. Marley,et al.  Synthetic Spectra and Colors of Young Giant Planet Atmospheres: Effects of Initial Conditions and Atmospheric Metallicity , 2008, 0805.1066.

[30]  D. Mouillet,et al.  Deep imaging survey of young, nearby austral stars - VLT/NACO near-infrared Lyot-coronographic observations , 2010 .