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

被引：38

作者：

Bouy, H

Martín, EL

Brandner, W

Bouvier, J

机构：

[1] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany

[2] Observ Grenoble, Astrophys Lab, F-38400 St Martin Dheres, France

[3] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA

[4] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain

[5] Max Planck Inst Astron, D-69117 Heidelberg, Germany

来源：

ASTRONOMICAL JOURNAL | 2005年 / 129卷 / 01期

关键词：

binaries : visual; stars : individual (DENIS-P J020529.0-115925); stars; low-mass; brown dwarfs; techniques : high angular resolution;

D O I：

10.1086/426559

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：511 / 517

页数：7

共 27 条

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