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EXTREME AO OBSERVATIONS OF TWO TRIPLE ASTEROID SYSTEMS WITH SPHERE
Published in The Astrophysical Journal
The Gemini NICI Planet-Finding Campaign: asymmetries in the HD 141569 disc
...Published in Monthly Notices of the Royal Astronomical Society
We report here the highest resolution near-IR imaging to date of the HD 141569A disc taken as part of the NICI (near infrared coronagraphic imager) Science Campaign. We recover four main features in the NICI images of the HD 141569 disc discovered in previous Hubble Space Telescope (HST) imaging:(1) an inner ring/spiral feature. Once deprojected, t...
PLANETS AROUND LOW-MASS STARS (PALMS). V. AGE-DATING LOW-MASS COMPANIONS TO MEMBERS AND INTERLOPERS OF YOUNG MOVING GROU...
...Published in The Astrophysical Journal
We present optical and near-infrared adaptive optics (AO) imaging and spectroscopy of 13 ultracool (> M6) companions to late-type stars (K7–M4. 5), most of which have recently been identified as candidate members of nearby young moving groups (YMGs; 8–120 Myr) in the literature. Three of these are new companions identified in our AO imaging survey,...
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Results from the Gemini NICI Planet-Finding Campaign
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From 2008 December to 2012 September, the NICI (Near-Infrared Coronagraphic Imager at the Gemini-South 8.1-m) Planet-Finding Campaign (Liu et al. 2010) obtained deep, high-contrast AO imaging of a carefully selected sample of over 200 young, nearby stars. In the course of the campaign, we discovered four co-moving brown dwarf companions: PZ Tel B (...
The Gemini NICI Planet-Finding Campaign
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Our team is carrying out a multi-year observing program to directly image and characterize young extrasolar planets using the Near-Infrared Coronagraphic Imager (NICI) on the Gemini-South 8.1-meter telescope. NICI is the first instrument on a large telescope designed from the outset for high-contrast imaging, comprising a high-performance curvature...
Contrast limits with the Simultaneous Differential Extrasolar Planet Imager (SDI) at the VLT and MMT
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We discuss contrast limits obtained during a survey of young (
