Bibcode
King, Robert R.; McCaughrean, Mark J.; Homeier, Derek; Allard, France; Scholz, Ralf-Dieter; Lodieu, Nicolas
Bibliographical reference
COOL STARS, STELLAR SYSTEMS AND THE SUN: Proceedings of the 15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun. AIP Conference Proceedings, Volume 1094, pp. 537-540 (2009).
Advertised on:
2
2009
Citations
2
Refereed citations
1
Description
The discovery of V Indi Ba and Bb, a nearby binary brown dwarf system
with a main-sequence companion, allows a concerted campaign to
characterise the physical parameters of two T dwarfs providing
benchmarks against which atmospheric and evolutionary models can be
tested. Some recent observations suggest the models at low mass and
intermediate age may not reflect reality with, however, few conclusive
tests.
We are carrying out a comprehensive characterisation of these, the
nearest known brown dwarfs, to allow constraints to be placed upon
models of cool field dwarfs. We present broadband photometry from the
V-to M'-band and the individual spectrum of both components from 0.6-5.1
μm at a resolution of up to R~5000. A custom analytic profile fitting
routine was implemented to extract the blended spectra and photometry of
both components separated by ~0.7''. We confirm the spectral types to be
T1 and T6, and notably, we do not detect lithium at 6708Å in the
more massive object which may be indicative both of the age of the
system and the mass of the components.