The very low mass multiple system LHS\,1070 -- a testbed for model atmospheres for the lower end of the main sequence
Abstract
LHS1070 is a nearby multiple system of low mass stars. It is an important source of information for probing the low mass end of the main sequence, down to the hydrogen-burning limit. The primary of the system is a mid-M dwarf and two components are late-M to early L dwarfs, at the star-brown dwarf transition. Hence LHS1070 is a valuable object to understand the onset of dust formation in cool stellar atmospheres.This work aims at determining the fundamental stellar parameters of LHS1070 and to test recent model atmospheres: BT-Dusty,BT-Settl, DRIFT, and MARCS models.Unlike in previous studies, we have performed a chi^2-minimization comparing well calibrated optical and infrared spectra with recent cool star synthetic spectra leading to the determination of the physical stellar parameters Teff, radius, and log g for each of the three components of LHS1070.
Cite
@article{arxiv.1208.0452,
title = {The very low mass multiple system LHS\,1070 -- a testbed for model atmospheres for the lower end of the main sequence},
author = {A. S. Rajpurohit and C. Reyle and M. Schultheis and Ch. Leinert and F. Allard and D. Homeier and T. Ratzka and P. Abraham and B. Moster and S. Witte and N. Ryde},
journal= {arXiv preprint arXiv:1208.0452},
year = {2015}
}
Comments
Accepted in Astronomy and Astrophysics, 15 pages, 11 figures