| Título: | The young open cluster Berkeley 55 |
| Autores: |
Negueruela Díez, Ignacio Marco Tobarra, Amparo |
| Fecha: |
2013-11-13 2013-11-13 2012-01-13 |
| Publicador: | RUA Docencia |
| Fuente: |
 |
| Tipo: | info:eu-repo/semantics/article |
| Tema: |
Galaxy: structure Open clusters and associations: individual (Berkeley 55) Stars: early-type Stars: evolution Supergiants Astronomía y Astrofísica Física Aplicada |
| Descripción: |
We present UBV photometry of the highly reddened and poorly studied open cluster Berkeley 55, revealing an important population of B-type stars and several evolved stars of high luminosity. Intermediate-resolution far-red spectra of several candidate members confirm the presence of one F-type supergiant and six late supergiants or bright giants. The brightest blue stars are mid-B giants. Spectroscopic and photometric analyses indicate an age 50 ± 10 Myr. The cluster is located at a distance d ≈ 4 kpc, consistent with other tracers of the Perseus Arm in this direction. Berkeley 55 is thus a moderately young open cluster with a sizable population of candidate red (super)giant members, which can provide valuable information about the evolution of intermediate-mass stars. This research is partially supported by the Spanish Ministerio de Ciencia e Innovación (MICINN) under grants AYA2008-06166-C03-03, AYA2010-21697-C05-05, and CSD2006-70, and by the Generalitat Valenciana (ACOMP/2010/259). |
| Idioma: | Inglés |
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