The edge of the young galactic disk
In this work, we report and discuss the detection of two distant diffuse stellar groups in the third Galactic quadrant. They are composed of young stars, with spectral types ranging from lateOto late B, and lie at galactocentric distances between 15 and 20 kpc. These groups are located in the area o...
Guardado en:
| Autores principales: | , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2010
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/82499 |
| Aporte de: |
| id |
I19-R120-10915-82499 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Astronómicas Galaxy: disk Galaxy: structure Open clusters and associations: general |
| spellingShingle |
Ciencias Astronómicas Galaxy: disk Galaxy: structure Open clusters and associations: general Carraro, G. Vázquez, Rolando Costa, E. Perren, G. Moitinho, A. The edge of the young galactic disk |
| topic_facet |
Ciencias Astronómicas Galaxy: disk Galaxy: structure Open clusters and associations: general |
| description |
In this work, we report and discuss the detection of two distant diffuse stellar groups in the third Galactic quadrant. They are composed of young stars, with spectral types ranging from lateOto late B, and lie at galactocentric distances between 15 and 20 kpc. These groups are located in the area of two cataloged open clusters (VdB-Hagen 04 and Ruprecht 30), projected toward the Vela-Puppis constellations, and within the core of the Canis Major overdensity. Their reddening and distances have been estimated by analyzing their color-color and color-magnitude diagrams, derived from deep UBV photometry. The existence of young star aggregates at such extreme distances from the Galactic center challenges the commonly accepted scenario in which the Galactic disk has a sharp cutoff at about 14 kpc from the Galactic center and indicates that it extends to much greater distances (as also supported by the recent detection of CO molecular complexes well beyond this distance). While the groups we find in the area of Ruprecht 30 are compatible with the Orion and Norma-Cygnus spiral arms, respectively, the distant group we identify in the region of VdB-Hagen 04 lies in the external regions of the Norma-Cygnus arm, at a galactocentric distance (∼20 kpc) where no young stars have been detected so far in the optical. |
| format |
Articulo Articulo |
| author |
Carraro, G. Vázquez, Rolando Costa, E. Perren, G. Moitinho, A. |
| author_facet |
Carraro, G. Vázquez, Rolando Costa, E. Perren, G. Moitinho, A. |
| author_sort |
Carraro, G. |
| title |
The edge of the young galactic disk |
| title_short |
The edge of the young galactic disk |
| title_full |
The edge of the young galactic disk |
| title_fullStr |
The edge of the young galactic disk |
| title_full_unstemmed |
The edge of the young galactic disk |
| title_sort |
edge of the young galactic disk |
| publishDate |
2010 |
| url |
http://sedici.unlp.edu.ar/handle/10915/82499 |
| work_keys_str_mv |
AT carrarog theedgeoftheyounggalacticdisk AT vazquezrolando theedgeoftheyounggalacticdisk AT costae theedgeoftheyounggalacticdisk AT perreng theedgeoftheyounggalacticdisk AT moitinhoa theedgeoftheyounggalacticdisk AT carrarog edgeoftheyounggalacticdisk AT vazquezrolando edgeoftheyounggalacticdisk AT costae edgeoftheyounggalacticdisk AT perreng edgeoftheyounggalacticdisk AT moitinhoa edgeoftheyounggalacticdisk |
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Repositorios |
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1764820488340635651 |