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Source subtraction for the extended Very Small Array and 33-GHz source count estimates
Kieran A. Cleary, Angela C. Taylor, Elizabeth Waldram +16
We describe the source subtraction strategy and observations for the extended Very Small Array, a CMB interferometer operating at 33 GHz. A total of 453 sources were monitored at 3…
Beryllium anomalies in solar-type field stars
N. C. Santos, G. Israelian, S. Randich +2
We present a study of beryllium (Be) abundances in a large sample of field solar-type dwarfs and sub-giants spanning a large range of effective temperatures. The analysis shows tha…
Are beryllium abundances anomalous in stars with giant planets?
N. C. Santos, G. Israelian, R. J Garcia Lopez +5
In this paper we present beryllium (Be) abundances in a large sample of 41 extra-solar planet host stars, and for 29 stars without any known planetary-mass companion, spanning a la…
Photometric variability of young brown dwarfs in the sigma Orionis open cluster
J. A. Caballero, V. J. S. Bejar, R. Rebolo +1
We have carried out multi-epoch, time-series differential I-band photometry of a large sample of objects in the south-east region of the young (~3 Myr), nearby (~350 pc) sigma Orio…
Cu and Zn in the early Galaxy
G. Bihain, G. Israelian, R. Rebolo +2
We present Cu and Zn abundances for 38 FGK stars, mostly dwarfs, spanning a metallicity range between solar and [Fe/H] =-3. The abundances were obtained using Kurucz's local therma…
Galactic Evolution of Nitrogen
G. Israelian, A. Ecuvillon, R. Rebolo +3
We present detailed spectroscopic analysis of nitrogen abundances in 31 unevolved metal-poor stars analysed by spectral synthesis of the near-UV NH band at 3360 A observed at high…