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Magnetic Field Topology in Low-Mass Stars: Spectropolarimetric Observations of M Dwarfs
N. Phan-Bao, J. Lim, J. -F. Donati +2
(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 coll…
A census of very-low-mass stars and brown dwarfs in the sigma Orionis cluster
N. Lodieu, M. R. Zapatero Osorio, R. Rebolo +2
(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 de…
Proper motions of cool and ultracool candidate members in the Upper Scorpius OB association
Herve Bouy, Eduardo L. Martin
Proper motion measurements of the cool and ultracool populations in the Upper Scorpius OB association are crucial to confirm membership and to identify possible run-away objects. W…
The transmission spectrum of Earth through lunar eclipse observations
Enric Palle, Maria Rosa Zapatero Osorio, Pilar Montanes-Rodriguez +2
Of the 342 planets discovered so far orbiting other stars, 58 "transit" the stellar disk, meaning that they can be detected by a periodic decrease in the starlight flux. The light…
2MASS J17112318-2724315: A Deeply-Embedded Low-Mass Protostellar System in the B59 Molecular Cloud
B. Riaz, E. L. Martin, H. Bouy +1
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 nebulos…