High contrast imaging; vortex coronagraphy; β Pictoris b
Abstract :
[en] Here we present the installation and successful commissioning of an L'-band Annular Groove Phase Mask (AGPM) coronagraph on VLT/NACO. The AGPM is a vector vortex coronagraph made from diamond subwavelength gratings tuned to the L' band. The vector vortex coronagraph enables high contrast imaging at very small inner working angle (here 0''.09, the diffraction limit of the VLT at L'), potentially being the key to a new parameter space. During technical and science verification runs, we discovered a late-type companion at two beamwidths from an F0V star (Mawet et al. 2013), and imaged the inner regions of β Pictoris down to the previously unexplored projected radius of 1.75 AU. The circumstellar disk was also resolved from ~= 1'' to 5'' (see J. Milli et al., these proceedings). These results showcase the potential of the NACO L-band AGPM over a wide range of spatial scales.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Mawet, D.; ESO, Alonso de Cordova 3107, Casilla 19001, Vitacura, Santiago 19, Chile
Absil, Olivier ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Milli, J.; ESO, Alonso de Cordova 3107, Casilla 19001, Vitacura, Santiago 19, Chile
Baudoz, P.; LESIA, Observatoire de Paris, 5 pl. J. Janssen, F-92195 Meudon, France
Boccaletti, A.; LESIA, Observatoire de Paris, 5 pl. J. Janssen, F-92195 Meudon, France
Chauvin, G.; IPAG, University Joseph Fourier, CNRS, BP 53, 38041, Grenoble, France
Delacroix, Christian ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Girard, J. H.; ESO, Alonso de Cordova 3107, Casilla 19001, Vitacura, Santiago 19, Chile
Lagrange, A. M.; IPAG, University Joseph Fourier, CNRS, BP 53, 38041, Grenoble, France
O'Neal, J.; ESO, Alonso de Cordova 3107, Casilla 19001, Vitacura, Santiago 19, Chile
Bourget, P.; ESO, Alonso de Cordova 3107, Casilla 19001, Vitacura, Santiago 19, Chile
Forsberg, P.; Ångström Laboratory, Uppsala University, Box 534, SE-751 21 Uppsala, Sweden
Gonte, F.; ESO, Alonso de Cordova 3107, Casilla 19001, Vitacura, Santiago 19, Chile
Habraken, Serge ; Université de Liège - ULiège > Département de physique > Optique - Hololab
Hanot, C.; AGO, Université de Liège, 17 Allée du Six Août, B-4000 Liège, Belgium
Karlsson, M.; Ångström Laboratory, Uppsala University, Box 534, SE-751 21 Uppsala, Sweden
Kasper, M.; ESO, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany
Lizon, J.-L.; ESO, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany
Muzic, K.; ESO, Alonso de Cordova 3107, Casilla 19001, Vitacura, Santiago 19, Chile
Olivier, R.; GDTech s.a., LIEGE Science Park, rue des Chasseurs Ardennais, B-4031 Liège, Belgium
Peña, E.; ESO, Alonso de Cordova 3107, Casilla 19001, Vitacura, Santiago 19, Chile
Slusarenko, N.; ESO, Alonso de Cordova 3107, Casilla 19001, Vitacura, Santiago 19, Chile
Tacconi-Garman, L. E.; IPAG, University Joseph Fourier, CNRS, BP 53, 38041, Grenoble, France
Surdej, Jean ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)