3 papers
astro-ph.SR2012
New ultracool subdwarfs identified in large-scale surveys using Virtual Observatory tools: Part I: UKIDSS LAS DR5 vs SDSS DR7
N. Lodieu, M. Espinoza Contreras, M. R. Zapatero Osorio +3
The aim of the project is to improve our knowledge on the low-mass and low-metallicity population to investigate the influence of metallicity of the stellar (and substellar) mass f…
astro-ph.SR2009
Simultaneous Multi-Wavelength Observations of Magnetic Activity in Ultracool Dwarfs. III. X-ray, Radio, and H-alpha Activity Trends in M and L Dwarfs
E. Berger, G. Basri, T. A. Fleming +6
[Abridged] As part of our on-going investigation into the magnetic field properties of ultracool dwarfs, we present simultaneous radio, X-ray, and H-alpha observations of three M9.…
astro-ph2005
Widely separated binary systems of very low mass stars
N. Phan-Bao, E. L. Martin, C. Reyle +2
In this paper we review some recent detections of wide binary brown dwarf systems and discuss them in the context of the multiplicity properties of very low-mass stars and brown dw…