Buscar
Mostrando ítems 1-10 de 81
Análise de populações estelares e subestruturas em aglomerados de galáxias
(Universidade Federal de Santa MariaBRFísicaUFSMPrograma de Pós-Graduação em Física, 2015-08-25)
In this work, we investigated differences between stellar populations of galaxies that are part
of a cluster with and without substructures. We used optical spectra obtained from Sloan Digital
Sky Servey III DR10 for the ...
Mapping the Milky Way Halo Substructures Using RR Lyrae Stars
(2018)
The Galactic halo is well populated by tidal streams and overdensities, showing its heterogeneus origin and providing important clues about its formation history. RR Lyrae stars have proven to be excellent tracers of halo ...
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 ...
Spectroscopy of bright quest RR Lyrae stars: Velocity substructures toward Virgo
(IOP PUBLISHING LTD, 2008-10)
Using a sample of 43 bright (V < 16.1, distance < 13 kpc) RR Lyrae stars
(RRLS) from the QUEST survey with spectroscopic radial velocities and metallicities,
we find that several separate halo substructures contribute ...
The Gaia-ESO Survey: a quiescent Milky Way with no significant dark/stellar accreted disc(a similar to...)
(OXFORD UNIV PRESS, 2015)
According to our current cosmological model, galaxies like the Milky Way are expected to experience many mergers over their lifetimes. The most massive of the merging galaxies will be dragged towards the disc plane, ...
Structure and substructure analysis of DAFT/FADA galaxy clusters in the [0.4-0.9] redshift range
(EDP SciencesLes Ulis, 2014)
Context. The DAFT/FADA survey is based on the study of ~90 rich (masses found in the literature >2 × 1014 M&sun;) and moderately distant clusters (redshifts 0.4 < z < 0.9), all with HST imaging data available. This survey ...
ALMA survey of orion planck galactic cold clumps (ALMASOP). II. Survey overview: a first look at 1.3 mm continuum maps and molecular outflows
(IOP, 2020)
Planck Galactic Cold Clumps (PGCCs) are considered to be the ideal targets to probe the early phases of star formation. We have conducted a survey of 72 young dense cores inside PGCCs in the Orion complex with the Atacama ...
A possible formation scenario for dwarf spheroidal galaxies - I. Fiducial model
(2013-06)
We perform numerical simulations to study a formation scenario for dwarf spheroidal (dSph) galaxies in which their stellar populations are the products of the dissolution of open star clusters and stellar associations ...
Simulating cosmological substructure in the solar neighbourhood
(Oxford University Press, 2019-11)
We explore the predictive power of cosmological, hydrodynamical simulations for stellar phase-space substructure and velocity correlations with the AURIGA simulations and AURIGAIA mock Gaia catalogues. We show that at the ...
The Gaia -ESO survey: separating disk chemical substructures with cluster models∗: evidence of a separate evolution in the metal-poor thin disk
(EDP Sciences, 2016-02)
Context. Recent spectroscopic surveys have begun to explore the Galactic disk system on the basis of large data samples, with spatial
distributions sampling regions well outside the solar neighborhood. In this way, they ...