Tata, R., Martin, E. L., Sengupta, S., Phan-Bao, N., Osorio, M. R. Zapatero, Bouy, H.
Aims.Recent studies have detected linear polarization in L dwarfs in the optical I band. Theoretical models have been developed to explain this polarization. These models predict higher polarization...
Berger, E., Basri, G., Fleming, T. A., Giampapa, M. S., Gizis, J. E., Liebert, J., ...
[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 M9.5-L2.5 dwarfs...
Magnetic Field Topology in Low-Mass Stars: Spectropolarimetric Observations of M Dwarfs (2009)
Phan-Bao, N., Lim, J., Johns-Krull, C. M., Martin, E. L.
(ABRIDGED) We report here our mapping of the magnetic field topology of the M4 dwarf G 164-31 (or Gl 490B), which is expected to be fully convective, based on time series data collected from 20 hours...
Infrared radial velocities of vB 10 (2009)
Osorio, M. R. Zapatero, Martin, E. L., Del Burgo, C., Deshpande, R., Montgomery, M. M.
We present radial velocities of the M8V-type, very low-mass star vB 10 that have been obtained at four different epochs of observations between 2001 and 2008. We use high-resolution (R ~ 20,000)...
A census of very-low-mass stars and brown dwarfs in the sigma Orionis cluster (2009)
Lodieu, N., Osorio, M. R. Zapatero, Rebolo, R., Martin, E. L., Hambly, N. C.
(ABRIDGED) We have analysed the near-infrared photometric data from the Fourth Data Release (DR4) of the UKIRT Infrared Deep Sky Suvey (UKIDSS) Galactic Clusters Survey (GCS) to derive the cluster...
A deep look into the core of young clusters. II. lambda-Orionis (2009)
Bouy, H., Huelamo, N., Navascues, D. Barrado Y, Martin, E. L., Petr-Gotzens, M. G., Kolb, J., ...
Over the past years, the lambda-Orionis cluster has been a prime location for the study of young very low mass stars, substellar and isolated planetary mass objects and the determination of the...
Riaz, B., Martin, E. L., Bouy, H., Tata, R.
We present near-infrared observations of the low-mass deeply-embedded Class 0/I system 2MASS J17112318-2724315 (2M171123) in the B59 molecular cloud. Bright scattered light nebulosity is observed...