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A close companion search around l dwarfs using aperture masking interferometry and palomar laser guide star adaptive optics

Bernat, David; Bouchez, Antonin; Ireland, Michael; Tuthill, Peter G; Martinache, Frantz; Angione, John; Burruss, Rick S; Cromer, John L; Dekany, Richard G; Guiwits, Stephen R; Henning, John R

Description

We present a close companion search around 16 known early L dwarfs using aperture masking interferometry with Palomar laser guide star adaptive optics (LGS AO). The use of aperture masking allows the detection of close binaries, corresponding to projected physical separations of 0.6-10.0AU for the targets of our survey. This survey achieved median contrast limits of ΔK ∼ 2.3 for separations between 1.2λ/D-4λ/D and ΔK ∼ 1.4 at λ/D. We present four candidate binaries detected with...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
URI: http://hdl.handle.net/1885/66824
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/715/2/724

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