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A new L-dwarf member of the moderately metal-poor triple system HD 221356
B. Gauza, V. J. S. Béjar, R. Rebolo +10
We report on the discovery of a fourth component in the HD 221356 star system, previously known to be formed by an F8V, slightly metal-poor primary ([Fe/H]=-0.26), and a distant M8…
Intermediate Resolution Near-Infrared Spectroscopy of 36 late-M Dwarfs
R. Deshpande, E. L. Martín, M. M. Montgomery +8
We present observations of 36 late-M dwarfs obtained with the KeckII/NIRSPEC in the J-band at a resolution of \sim20,000. We have measured projected rotational velocities, absolute…
Glancing views of the Earth. From a lunar eclipse to an exoplanetary transit
A. García Muñoz, M. R. Zapatero Osorio, R. Barrena +3
It has been posited that lunar eclipse observations may help predict the in-transit signature of Earth-like extrasolar planets. However, a comparative analysis of the two phenomena…
ExELS: an exoplanet legacy science proposal for the ESA Euclid mission I. Cold exoplanets
M. T. Penny, E. Kerins, N. Rattenbury +11
Euclid is the second M-class mission of the ESA Cosmic Vision programme, with the principal science goal of studying dark energy. Euclid is also expected to undertake additional Le…
New isolated planetary mass objects and the stellar and substellar mass function of the sigma Orionis cluster
K. Peña Ramírez, V. J. S. Béjar, M. R. Zapatero Osorio +2
We report on our analysis of the VISTA Orion ZYJHKs photometric data (completeness magnitudes Z=22.6 and J=21.0mag) focusing on a circular area of 2798.4 arcmin^2 around the young…
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…