Title

A possible third component in the L dwarf binary system DENIS-P J020529.0-115925 discovered with the Hubble Space Telescope

Authors

Authors

H. Bouy; E. L. Martin; W. Brandner;J. Bouvier

Comments

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Abbreviated Journal Title

Astron. J.

Keywords

binaries : visual; stars : individual (DENIS-P J020529.0-115925); stars; : low-mass, brown dwarfs; techniques : high angular resolution; LOW-MASS STARS; BROWN DWARFS; SPECTRAL CLASSIFICATION; T-DWARF; MULTIPLICITY; PHOTOMETRY; Astronomy & Astrophysics

Abstract

We present results showing that the multiple system DENIS-P J020529.0-115925 is likely to be a triple system of very low mass stars and brown dwarfs. The secondary of this previously known binary system shows a clear elongation on six images obtained at six different epochs. Significant residuals remain after point-spread function (PSF) subtraction on these images, which is characteristic of multiplicity and indicates that the secondary is probably a double itself. Dual-PSF fitting shows that the shape of the secondary is consistent with that of a binary system. These measurements show that the probability that DENIS-P J020529.0-115925 is a triple system is very high. The photometric and spectroscopic properties of the system are consistent with the presence of three components, with spectral types L5, L8, and T0.

Journal Title

Astronomical Journal

Volume

129

Issue/Number

1

Publication Date

1-1-2005

Document Type

Article

Language

English

First Page

511

Last Page

517

WOS Identifier

WOS:000226130800037

ISSN

0004-6256

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