A Possible Third Component in the L Dwarf Binary System DENIS-P J020529.0-115925 Discovered with the Hubble Space Telescope
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.
- Publication:
-
The Astronomical Journal
- Pub Date:
- January 2005
- DOI:
- 10.1086/426559
- arXiv:
- arXiv:astro-ph/0410226
- Bibcode:
- 2005AJ....129..511B
- Keywords:
-
- Stars: Binaries: Visual;
- stars: individual (DENIS-P J020529.0-115925);
- Stars: Low-Mass;
- Brown Dwarfs;
- Techniques: High Angular Resolution;
- Astrophysics
- E-Print:
- 15 pages, 3 tables, 6 figures, accepted for publication in AJ. High resolution version available at ftp://ftp.mpe.mpg.de/people/hbouy/publications/denis0205.ps.gz