A deep and wide-field view at the IC 2944/2948 complex in Centaurus
We employed the ESO Max Planck Institute (MPI) wide-field camera (Baade et al.) and obtained deep images in the VIC pass-bands in the region of the IC 2944/2948 complex (l ~ 294.°8; b ~ -1.°6), and complemented them with literature and archival data. We used this material to derive the photometric,...
| Autores principales: | , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2014
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/85266 |
| Aporte de: |
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I19-R120-10915-85266 |
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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: structure Open clusters and associations: general Open clusters and associations: individual: IC 2944 Stars: early-type Stars: formation Stars: pre-main-sequence |
| spellingShingle |
Ciencias Astronómicas Galaxy: structure Open clusters and associations: general Open clusters and associations: individual: IC 2944 Stars: early-type Stars: formation Stars: pre-main-sequence Baume, Gustavo Luis Rodríguez, María Jimena Corti, Mariela Alejandra Carraro, G. Panei, Jorge Alejandro A deep and wide-field view at the IC 2944/2948 complex in Centaurus |
| topic_facet |
Ciencias Astronómicas Galaxy: structure Open clusters and associations: general Open clusters and associations: individual: IC 2944 Stars: early-type Stars: formation Stars: pre-main-sequence |
| description |
We employed the ESO Max Planck Institute (MPI) wide-field camera (Baade et al.) and obtained deep images in the VIC pass-bands in the region of the IC 2944/2948 complex (l ~ 294.°8; b ~ -1.°6), and complemented them with literature and archival data. We used this material to derive the photometric, spectroscopic and kinematic properties of the brightest (V < 16) stars in the region. The VI deep photometry on the other end, helped us to unravel the lower main sequence of a few, possibly physical, star groups in the area. Our analysis confirmed previous suggestions that the extinction towards this line of sight follows the normal law (RV = 3.1). We could recognize B-type stars spread in distance from a few hundred pc to at least 2 kpc. We found two young groups (age ~ 3 Myr) located, respectively, at about 2.3 and 3.2 kpc from the Sun. They are characterized by a significant variable extinction (E(B - V) ranging from 0.28 to 0.45 mag), and host a significant pre-main-sequence population. We computed the initial mass functions for these groups and obtained slopes G{cyrillic} from -0.94 to -1.02 (eG{cyrillic} = 0.3) in a scale where the classical Salpeter law is -1.35. We estimated the total mass of bothmain stellar groups in ~ 1100 and ~ 500M⊙, respectively. Our kinematic analysis indicated that both groups of stars deviate from the standard rotation curve of the Milky Way, in line with literature results for this specific Galactic direction. Finally, along the same line of sight, we identified a third group of early-type stars located at ~8 kpc from the Sun. This group might be located in the far side of the Sagittarius-Carina spiral arm. |
| format |
Articulo Articulo |
| author |
Baume, Gustavo Luis Rodríguez, María Jimena Corti, Mariela Alejandra Carraro, G. Panei, Jorge Alejandro |
| author_facet |
Baume, Gustavo Luis Rodríguez, María Jimena Corti, Mariela Alejandra Carraro, G. Panei, Jorge Alejandro |
| author_sort |
Baume, Gustavo Luis |
| title |
A deep and wide-field view at the IC 2944/2948 complex in Centaurus |
| title_short |
A deep and wide-field view at the IC 2944/2948 complex in Centaurus |
| title_full |
A deep and wide-field view at the IC 2944/2948 complex in Centaurus |
| title_fullStr |
A deep and wide-field view at the IC 2944/2948 complex in Centaurus |
| title_full_unstemmed |
A deep and wide-field view at the IC 2944/2948 complex in Centaurus |
| title_sort |
deep and wide-field view at the ic 2944/2948 complex in centaurus |
| publishDate |
2014 |
| url |
http://sedici.unlp.edu.ar/handle/10915/85266 |
| work_keys_str_mv |
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| bdutipo_str |
Repositorios |
| _version_ |
1764820489170059266 |