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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 ...
Density Variations in the NW Star Stream of M31
(2011)
The Pan Andromeda Archeological Survey (PAndAS) CFHT Megaprime survey of the M31-M33 system has found a star stream which extends about 120 kpc NW from the center of M31. The great length of the stream, and the likelihood ...
Homogeneous photometry and star counts in the field of 9 Galactic star clusters
(2010)
We present homogeneous $V,I$ CCD photometry of nine stellar fields in the two inner quadrants of the Galactic plane. The lines-of-view to most of these fields aim in the direction of the very inner Galaxy, where the Galactic ...
Long-Term Monitoring of the Dynamics and Particle Acceleration of Knots in the Jet of Centaurus A
(2010)
We present new and archival multi-frequency radio and X-ray data for Centaurus A obtained over almost 20 years at the Very Large Array and with Chandra, with which we measure the X-ray and radio spectral indices of jet ...
High resolution HDS/SUBARU chemical abundances of the young stellar cluster Palomar 1
(2011)
Context. Palomar 1 is a peculiar globular cluster (GC). It is the youngest Galactic GC and it has been tentatively associated to several of the substructures recently discovered in the Milky Way (MW), including the Canis ...
Accurate stellar kinematics at faint magnitudes: Application to the Boötes i dwarf spheroidal galaxy
(2011)
We develop, implement and characterise an enhanced data reduction approach which delivers precise, accurate, radial velocities from moderate resolution spectroscopy with the fibre-fed VLT/FLAMES+GIRAFFE facility. This ...
Toward the General Red Giant Branch Slope-Metallicity-Age Calibration. I. Metallicities, Ages, and Kinematics for Eight Large Magellanic Cloud Clusters
(2010)
In this paper, we discuss the properties of color-magnitude diagrams, age, metallicity, and radial velocities of eight massive Large Magellanic Cloud (LMC) clusters using data taken from the FORS2 multiobject spectrograph ...
The Araucaria Project. Infrared Tip of the Red Giant Branch Distances to Five Dwarf Galaxies in the Local Group
(2011)
We have obtained accurate near-infrared photometry of the tip of the red giant branch (TRGB) in the Local Group galaxies Sculptor, NGC 6822, NGC 3109, IC 1613, and WLM. We have used the derived TRGB magnitudes together ...
Identificación de los mecanismos subyacentes a la invasión de Castor canadensis (Rodentia) en el archipiélago de Tierra del Fuego, Chile
(2007)
Castor canadensis is considered an archetypical ecosystem engineer, which modifies the state of biotic and abiotic factors through non-trophic interactions. This species was introduced by the Argentinean government into ...
Making Homeland (Haciendo Patria): Agrarian Change, Nationhood and Inter-Ethnic Relations at the Frontier of Colonial Expansionin Chile
(2016)
As are many other valleys in the southern Andean region of Chile, Coilaco was the setting of some of the last processes of colonial resettlement that followed the colonization of the indigenous Mapuche region in the late ...