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Companions to nearby stars with astrometric acceleration. II
Andrei Tokovinin, Markus Hartung, Thomas L. Hayward
Hipparcos astrometric binaries were observed with the NICI adaptive optics system at Gemini-S, completing the work of Paper I (Tokovinin et al. 2012). Among the 65 F, G, K dwarfs w…
Revealing companions to nearby stars with astrometric acceleration
Andrei Tokovinin, Markus Hartung, Thomas L. Hayward +1
A subset of 51 Hipparcos astrometric binaries among FG dwarfs within 67pc has been surveyed with the NICI adaptive optics system at Gemini-S, directly resolving for the first time…
The Gemini NICI Planet-Finding Campaign: Discovery of a Multiple System Orbiting the Young A Star HD 1160
Eric L. Nielsen, Michael C. Liu, Zahed Wahhaj +22
We report the discovery by the Gemini NICI Planet-Finding Campaign of two low-mass companions to the young A0V star HD 1160 at projected separations of 81 +/- 5 AU (HD 1160 B) and…
Ruling out unresolved binaries in five transitional disks VLT/NACO: deep 2.12 and 1.75 μm narrow-band imaging
Silvia Vicente, Bruno Merın, Markus Hartung +8
Aims. We aim at detecting the presence of companions inside the inner hole/gap region of a sample of five well known transitional disks using spatially-resolved imaging in the near…
The Gemini NICI Planet-Finding Campaign : Discovery of a Substellar L Dwarf Companion to the Nearby Young M Dwarf CD-35 2722
Zahed Wahhaj, Michael C. Liu, Beth A. Biller +23
We present the discovery of a wide (67 AU) substellar companion to the nearby (21 pc) young solar-metallicity M1 dwarf CD-35 2722, a member of the ~100 Myr AB Doradus association.…
The Gemini NICI Planet-Finding Campaign
Michael C. Liu, Zahed Wahhaj, Beth A. Biller +21
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 Gemin…