Publications (15)
Discovery of a Low-Mass Companion to the F7V star HD 984
T. Meshkat, M. Bonnefoy, E. E. Mamajek +8
We report the discovery of a low-mass companion to the nearby (d = 47 pc) F7V star HD 984. The companion is detected 0.19" away from its host star in the L' band with the Apodizing…
The Young Suns Exoplanet Survey: Detection of a wide orbit planetary mass companion to a solar-type Sco-Cen member
A. J. Bohn, M. A. Kenworthy, C. Ginski +9
The Young Suns Exoplanet Survey (YSES) consists of a homogeneous sample of 70 young, solar-mass stars located in the Lower Centaurus-Crux subgroup of the Scorpius-Centaurus associa…
Further Evidence of the Planetary Nature of HD 95086 b from Gemini/NICI H-band Data
T. Meshkat, V. Bailey, J. Rameau +8
We present our analysis of the Gemini/NICI H-band data of HD 95086, following the discovery of the planet HD 95086 b in L'. The H-band data reach a contrast of 12.7 mag relative to…
Confirmation of the planet around HD 95086 by direct imaging
J. Rameau, G. Chauvin, A. -M. Lagrange +8
VLT/NaCo angular differential imaging at L' (3.8 microns) revealed a probable giant planet comoving with the young and early-type HD 95086 also known to harbor an extended debris d…
Paving the Way to Future Missions: the Roman Space Telescope Coronagraph Technology Demonstration
B. Mennesson, R. Juanola-Parramon, B. Nemati +33
This document summarizes how far the Nancy Grace Roman Space Telescope Coronagraph Instrument (Roman CGI) will go toward demonstrating high-contrast imaging and spectroscopic requi…
Discovery of a directly imaged disk in scattered light around the Sco-Cen member Wray 15-788
A. J. Bohn, M. A. Kenworthy, C. Ginski +10
As part of our on-going survey we have carried out high-contrast imaging with VLT/SPHERE/IRDIS to obtain polarized and total intensity images of the young (Myr old)…
Optimized Principal Component Analysis on Coronagraphic Images of the Fomalhaut System
T. Meshkat, M. Kenworthy, S. P. Quanz +1
We present the results of a study to optimize the principal component analysis (PCA) algorithm for planet detection, a new algorithm complementing ADI and LOCI for increasing the c…
Deep imaging search for planets forming in the TW Hya protoplanetary disk with the Keck/NIRC2 vortex coronagraph
G. Ruane, D. Mawet, J. Kastner +10
Distinct gap features in the nearest protoplanetary disk, TW Hya (distance of 59.50.9 pc), may be signposts of ongoing planet formation. We performed long-exposure thermal inf…
Coronagraphic observations of Fomalhaut at solar system scales
M. A. Kenworthy, T. Meshkat, S. P. Quanz +3
We report on a search for low mass companions within 10 AU of the star Fomalhaut, using narrow band observations at 4.05 microns obtained with the Apodizing Phase Plate (APP) coron…
Substellar and low-mass dwarf identification with near-infrared imaging space observatories
B. W. Holwerda, J. S. Bridge, R. Ryan +9
AIMS: We aim to evaluate the near-infrared colors of brown dwarfs as observed with four major infrared imaging space observatories: the Hubble Space Telescope (HST), the James Webb…
Searching for gas giant planets on Solar System scales - A NACO/APP L'-band survey of A- and F-type Main Sequence stars
T. Meshkat, M. A. Kenworthy, M. Reggiani +3
We report the results of a direct imaging survey of A- and F-type main sequence stars searching for giant planets. A/F stars are often the targets of surveys, as they are thought t…
Exoplanet Imaging Data Challenge: benchmarking the various image processing methods for exoplanet detection
F. Cantalloube, C. Gomez-Gonzalez, O. Absil +23
The Exoplanet Imaging Data Challenge is a community-wide effort meant to offer a platform for a fair and common comparison of image processing methods designed for exoplanet direct…
High-contrast imaging of HD 163296 with the Keck/NIRC2 L'-band vortex coronograph
G. Guidi, G. Ruane, J. P. Williams +16
We present observations of the nearby (D100\,pc) Herbig star HD~163296 taken with the vortex coronograph at Keck/NIRC2 in the L' band (3.7~m), to search for planetary mas…
The Potential of Exozodiacal Disks Observations with the WFIRST Coronagraph Instrument
B. Mennesson, V. Bailey, J. Kasdin +60
The Wide Field Infrared Survey Telescope (WFIRST) Coronagraph Instrument (CGI) will be the first high-performance stellar coronagraph using active wavefront control for deep starli…
Discovery of a probable 4-5 Jupiter-mass exoplanet to HD 95086 by direct-imaging
J. Rameau, G. Chauvin, A. -M. Lagrange +13
Direct imaging has just started the inventory of the population of gas giant planets on wide-orbits around young stars in the solar neighborhood. Following this approach, we carrie…