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No Evidence for Internal Rotation in the Remnant Core of the Sagittarius Dwarf
(2011)
We have conducted a spectroscopic survey of the inner regions of the Sagittarius (Sgr) dwarf galaxy using the AAOmega spectrograph on the Anglo-Australian Telescope. We determine radial velocities for over 1800 Sgr star ...
The X-ray luminous galaxy cluster XMMU J1007.4+1237 at z = 1.56. The dawn of starburst activity in cluster cores
(2011)
Context. Observational galaxy cluster studies at z > 1.5 probe the formation of the first massive M > 1014 M⊙ dark matter halos, the early thermal history of the hot ICM, and the emergence of the red-sequence population ...
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 ...
Near-infrared photometry and spectroscopy of the low Galactic latitude globular cluster 2MASS-GC 03
(2016)
We present deep near-infrared photometry and spectroscopy of the globular cluster 2MASS-GC 03 projected in the Galactic disc using MMT and Magellan Infrared Spectrograph on the Clay Telescope (Las Campanas Observatory) and ...
Angular momentum evolution for galaxies in a Lambda-CDM scenario
(2015)
Context. Galaxy formation in the current cosmological paradigm is a very complex process in which inflows, outflows, interactions, and mergers are common events. These processes can redistribute the angular momentum content ...
Theoretical predictions for dark matter detection in dwarf irregular galaxies with gamma rays
(2018-10-15)
We investigate rotationally supported dwarf irregular (DIRR) galaxies as a new category of targets for indirect dark matter (DM) searches with gamma-ray telescopes. In the framework of pointlike analysis, pressure-supported ...
Sustainable micro-business in environmental unsustainability and economic inefficiency
(2006)
We have carried out deep BVR surface photometry of 6 cD and cD-like galaxies using the 2.1-m telescope at San Pedro Mrtir, cD galaxies are supergiant galaxies (M>1013M) with enormous halos (>100 kpc in radius) ...
Effects of AGN feedback on ΛCDM galaxies
(2008)
We study the effects of Active Galactic Nuclei (AGN) feedback on the formation and evolution of galaxies in a semi-analytic model of galaxy formation. This model is an improved version of the one described by Cora (2006), ...
Estudio químico del cúmulo globular NGC-5927 Chemical study of the globular cluster NGC-5927
(Universidad de Concepción.Facultad de Ciencias Físicas y Matemáticas, 2017)
Globular Clusters (GCs) are natural laboratories where stellar and chemical evolution can be studied in detail. In addition, their chemical patterns and kinematics can tell us which Galactic structure (Disk, Bulge, Halo ...
From formation to quenching: The role of overdensities in high-redshift galaxy evolution
(Universidad de Concepción, 2024)
This study investigates the evolution of galaxies within 13 overdensities at redshifts 3 < z < 4, providing critical insights into galaxy formation and evolution in dense environments. Key findings include the observation ...