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CNO and F abundances in the barium star HD 123396
(2011)
Barium stars are moderately rare, chemically peculiar objects, which are believed to be the result of the pollution of an otherwise normal star by material from an evolved companion on the asymptotic giant branch (AGB). ...
Photometric Characterization of the Galactic Star Cluster Trumpler 20
(2010)
We present deep UBVI photometry for Trumpler 20, a rich, intermediate-age open cluster located at l = 30147, b = +222 (α = 12h39m34s, δ = –60°37'00'', J2000.0) in the fourth Galactic quadrant. In spite of its interesting ...
New R Coronae Borealis stars discovered in OGLE-III Galactic bulge fields from their mid- and near-infrared properties
(2011)
Context. An R Coronae Borealis (RCB) star is a rare type of supergiant star that is increasingly suspected to be the evolved merger product of two white dwarfs. Lately, many RCBs have been found distributed in a thin disk ...
The Optical Gravitational Lensing Experiment. The OGLE-III Catalog of variable stars. VIII. Type II Cepheids in the Small Magellanic Cloud
(2010)
The eighth part of the OGLE-III Catalog of Variable Stars (OIII-CVS) contains type II Cepheids in the Small Magellanic Cloud (SMC). The sample consists of 43 objects, including 17 BL Her, 17 W Vir and 9 RV Tau stars (first ...
The lithium content of ω Centauri. New clues to the cosmological Li problem from old stars in external galaxies
(2010)
A discrepancy has emerged between the cosmic lithium abundance inferred by the WMAP satellite measurement coupled with the prediction of the standard big-bang nucleosynthesis theory, and the constant Li abundance measured ...
The new carbon symbiotic star IPHAS J205836.43+503307.2
(2011)
We are performing a search for symbiotic stars using IPHAS, the INT Halpha survey of the northern Galactic plane, and follow-up observations. Candidate symbiotic stars are selected on the basis of their IPHAS and near-IR ...