A FOSSIL BULGE GLOBULAR CLUSTER REVEALED BY VERY LARGE TELESCOPE MULTI-CONJUGATE ADAPTIVE OPTICS
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
19/10/2012
19/10/2012
2011
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| Resumo |
The globular cluster HP 1 is projected on the bulge, very close to the Galactic center. The Multi-Conjugate Adaptive Optics Demonstrator on the Very Large Telescope allowed us to acquire high-resolution deep images that, combined with first epoch New Technology Telescope data, enabled us to derive accurate proper motions. The cluster and bulge fields` stellar contents were disentangled through this process and produced an unprecedented definition in color-magnitude diagrams of this cluster. The metallicity of [Fe/H] approximate to -1.0 from previous spectroscopic analysis is confirmed, which together with an extended blue horizontal branch imply an age older than the halo average. Orbit reconstruction results suggest that HP 1 is spatially confined within the bulge. CNPq FAPESP |
| Identificador |
ASTROPHYSICAL JOURNAL, v.737, n.1, 2011 0004-637X http://producao.usp.br/handle/BDPI/27074 10.1088/0004-637X/737/1/31 |
| Idioma(s) |
eng |
| Publicador |
IOP PUBLISHING LTD |
| Relação |
Astrophysical Journal |
| Direitos |
restrictedAccess Copyright IOP PUBLISHING LTD |
| Palavras-Chave | #Galaxy: bulge #globular clusters: general #globular clusters: individual (HP 1) #COLOR-MAGNITUDE DIAGRAMS #HUBBLE-SPACE-TELESCOPE #GALACTIC BULGE #PROPER MOTION #SOLAR NEIGHBORHOOD #STELLAR ORBITS #BAADES WINDOW #STAR-CLUSTERS #BRANCH STARS #GIANT BRANCH #Astronomy & Astrophysics |
| Tipo |
article original article publishedVersion |
