Repositório Digital

A- A A+

A low-absorption disk zone at low Galactic latitude in Centaurus

.

A low-absorption disk zone at low Galactic latitude in Centaurus

Mostrar registro completo

Estatísticas

Título A low-absorption disk zone at low Galactic latitude in Centaurus
Autor Bica, Eduardo Luiz Damiani
Bonatto, Charles Jose
Santiago, Basilio Xavier
Kerber, Leandro de Oliveira
Abstract We investigate the properties of two stellar concentrations in a low-absorption disk zone in Centaurus, located respectively at l = 306.47°, b = −0.61°, and l = 307.01°, b = −0.74°. The present analysis is based mostly on 2MASS photometry, as well as optical photometry. Based on colour–magnitude diagrams and stellar radial density profiles, we show that these concentrations are not open star clusters. Instead, they appear to be field stars seen through a differentially-reddened window. We estimate that the bulk of the stars in both stellar concentrations is located at ~1.5 kpc from the Sun, a distance consistent with that of the Sgr-Car arm in that direction. This low-absorption window allows one to probe into distant parts of the disk besides the Sgr-Car arm, probably the tangent part of the Sct-Cru arm, and/or the far side of the Sgr-Car arm in that direction. The main sequence associated to the Sgr-Car arm is reddened by E(B − V) ~ 0.5, so that this window through the disk is comparable in reddening to Baade’s window to the bulge. We also investigate the nature of the open cluster candidate Ru 166. The presently available data do not allow us to conclude whether Ru 166 is an actual open cluster or field stars seen through a small-scale low-absorption window.
Contido em Astronomy and astrophysics. Vol. 433, no. 3 (Apr. 2005), p. 931-940
Assunto Astronomia
[en] Galaxy: stellar content
[en] Galaxy: structure
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/98764
Arquivos Descrição Formato
000484872.pdf (2.782Mb) Texto completo (inglês) Adobe PDF Visualizar/abrir

Este item está licenciado na Creative Commons License

Este item aparece na(s) seguinte(s) coleção(ões)


Mostrar registro completo

Percorrer



  • O autor é titular dos direitos autorais dos documentos disponíveis neste repositório e é vedada, nos termos da lei, a comercialização de qualquer espécie sem sua autorização prévia.
    Projeto gráfico elaborado pelo Caixola - Clube de Criação Fabico/UFRGS Powered by DSpace software, Version 1.8.1.