Context. The total mass of a cluster, which is the main parameter determining its ability to host more than one stellar generation, may constitute a threshold below which the cluster is able to form only a single stellar population. Aims: Our goal is to investigate the existence of star-to-star variations in CN and CH band strengths, which are
Searching for chemical inhomogeneities in open clusters. Analysis of the CN and CH molecular band strengths in NGC 2158, NGC 2420, NGC 2682, NGC 7789, and Berkeley 29Carrera, R. et al.122013
Searching for High Redshift Clusters
Distant clusters of galaxies provide a powerful method to study the formation and evolution of galaxies, and large scale structure of the Universe. However, the number of known clusters at high redshift (z > 0.5) is still very reduced. As a preparatory work for detailed studies with GTC, we are searching for high redshift clusters in public wideJuncosa, R. et al.
Fecha de publicación:122005
Searching for Ultra-cool Objects at the Limits of Large-scale Surveys
We have made a search (to Y=19.6) of the UKIDSS Large Area Survey (LAS DR7) for objects detected only in the Y-band. We have identified and removed contamination due to solar system objects, dust specs in the WFCAM optical path, persistence in the WFCAM detectors, and other sources of spurious single source Y-detections in the UKIDSS LAS data-basePinfield, D. J. et al.
Fecha de publicación:122011
Secular- and merger-built bulges in barred galaxies
Context. Historically, galaxy bulges were thought to be single-component objects at the center of galaxies. However, this picture is now questioned since different bulge types with different formation paths, namely classical and pseudobulges, have been found coexisting within the same galaxy. Aims: We study the incidence and nature of compositeMéndez-Abreu, J. et al.
Fecha de publicación:122014
SED fitting of nearby galaxies in the Herschel Reference Survey
We compute UV to radio continuum spectral energy distributions of 51 nearby galaxies recently observed with SPIRE onboard Herschel and present infrared colours (in the 25-500 μm spectral range). SPIRE data of normal galaxies are well reproduced with a modified black body (β=2) of temperature T≃q 20 K. In ellipticals hosting a radio galaxy, the farCiesla, L. et al.
Fecha de publicación:122010
Seeking Chemical and Kinematic Correlations within the Carina Dwarf Spheroidal
We explore the possibility that the old and intermediate-age, populations within the Carina dwarf spheroidal galaxy exhibit distinct kinematic and chemical signatures. Preliminary results from medium-resolution data indeed indicate that such differences do exist. We report on the magnitude of these differences and their uncertainties. This researchNevils, G. K. et al.
Fecha de publicación:122004