Photometry of a galactic field at l = 232°. b = -6°: The old open cluster Auner 1, The Norma-Cygnus spiral arm, and the signature of the warped galactic thick disk
We perform a detailed photometric study of the stellar populations in a Galactic field at l = 232°, b = -6° in the Canis Major (CMa) constellation. We present the first U, B, V, I photometry of the old open cluster Auner 1 and determine it to be ≈3.25 Gyr old and to lie 8.9 kpc from the Sun. In the...
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Autores principales: | , , , , |
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Formato: | Articulo |
Lenguaje: | Inglés |
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2007
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/83126 |
Aporte de: |
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I19-R120-10915-83126 |
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dspace |
institution |
Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
collection |
SEDICI (UNLP) |
language |
Inglés |
topic |
Ciencias Astronómicas Galaxy: general Hertzsprung-Russell diagram Open clusters and associations: general Open clusters and associations: individual (Auner 1) |
spellingShingle |
Ciencias Astronómicas Galaxy: general Hertzsprung-Russell diagram Open clusters and associations: general Open clusters and associations: individual (Auner 1) Carraro, Giovanni Moitinho, André Zoccali, Manuela Vázquez, Rubén Ángel Baume, Gustavo Photometry of a galactic field at l = 232°. b = -6°: The old open cluster Auner 1, The Norma-Cygnus spiral arm, and the signature of the warped galactic thick disk |
topic_facet |
Ciencias Astronómicas Galaxy: general Hertzsprung-Russell diagram Open clusters and associations: general Open clusters and associations: individual (Auner 1) |
description |
We perform a detailed photometric study of the stellar populations in a Galactic field at l = 232°, b = -6° in the Canis Major (CMa) constellation. We present the first U, B, V, I photometry of the old open cluster Auner 1 and determine it to be ≈3.25 Gyr old and to lie 8.9 kpc from the Sun. In the background of the cluster, at more than 9 kpc, we detect a young population most likely associated with the Norma-Cygnus spiral arm. Furthermore, we detect the signature of an older population and identify its turnoff and red giant branch. This population is found to have a mean age of 7 Gyr and a mean metallicity of Z = 0.006. We reconstruct the geometry of the stellar distribution and argue that this older population, often associated with the CMa "galaxy," in fact belongs to the warped old thin- and thick-disk components along this line of sight. |
format |
Articulo Articulo |
author |
Carraro, Giovanni Moitinho, André Zoccali, Manuela Vázquez, Rubén Ángel Baume, Gustavo |
author_facet |
Carraro, Giovanni Moitinho, André Zoccali, Manuela Vázquez, Rubén Ángel Baume, Gustavo |
author_sort |
Carraro, Giovanni |
title |
Photometry of a galactic field at l = 232°. b = -6°: The old open cluster Auner 1, The Norma-Cygnus spiral arm, and the signature of the warped galactic thick disk |
title_short |
Photometry of a galactic field at l = 232°. b = -6°: The old open cluster Auner 1, The Norma-Cygnus spiral arm, and the signature of the warped galactic thick disk |
title_full |
Photometry of a galactic field at l = 232°. b = -6°: The old open cluster Auner 1, The Norma-Cygnus spiral arm, and the signature of the warped galactic thick disk |
title_fullStr |
Photometry of a galactic field at l = 232°. b = -6°: The old open cluster Auner 1, The Norma-Cygnus spiral arm, and the signature of the warped galactic thick disk |
title_full_unstemmed |
Photometry of a galactic field at l = 232°. b = -6°: The old open cluster Auner 1, The Norma-Cygnus spiral arm, and the signature of the warped galactic thick disk |
title_sort |
photometry of a galactic field at l = 232°. b = -6°: the old open cluster auner 1, the norma-cygnus spiral arm, and the signature of the warped galactic thick disk |
publishDate |
2007 |
url |
http://sedici.unlp.edu.ar/handle/10915/83126 |
work_keys_str_mv |
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bdutipo_str |
Repositorios |
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1764820488315469828 |