Spiral structure in the outer galactic disk. I. The third galactic quadrant

We combine optical and radio observations to trace the spiral structure in the third quadrant of the Milky Way. The optical observations consist of a large sample of young open clusters and associations, whereas the radio observations consist of a survey of nearby and distant clouds observed in CO....

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Autores principales: Vázquez, Rubén Ángel, May, Jorge, Carraro, Giovanni, Bronfman, Leonardo, Moitinho, André, Baume, Gustavo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2008
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Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84323
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id I19-R120-10915-84323
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
Vázquez, Rubén Ángel
May, Jorge
Carraro, Giovanni
Bronfman, Leonardo
Moitinho, André
Baume, Gustavo
Spiral structure in the outer galactic disk. I. The third galactic quadrant
topic_facet Ciencias Astronómicas
Galaxy: disk
Galaxy: structure
Open clusters and associations: general
description We combine optical and radio observations to trace the spiral structure in the third quadrant of the Milky Way. The optical observations consist of a large sample of young open clusters and associations, whereas the radio observations consist of a survey of nearby and distant clouds observed in CO. Both the optical and radio samples are the largest ones thus far presented in the literature. We use this unique material to analyze the behavior of interstellar extinction and to trace the detailed structure of the third Galactic quadrant (TGQ).We find that the outer (Cygnus) grand design spiral arm is traced by stellar and CO components, while the Perseus arm is traced solely by CO and is possibly being disrupted by the crossing of the Local (Orion) arm. The Local arm is traced by CO and young stars toward l = 240° and extends for over 8 kpc along the line of sight reaching the outer arm. Finally, we characterize the Galactic warp and compare the geometries implied by the young stellar and CO components.
format Articulo
Articulo
author Vázquez, Rubén Ángel
May, Jorge
Carraro, Giovanni
Bronfman, Leonardo
Moitinho, André
Baume, Gustavo
author_facet Vázquez, Rubén Ángel
May, Jorge
Carraro, Giovanni
Bronfman, Leonardo
Moitinho, André
Baume, Gustavo
author_sort Vázquez, Rubén Ángel
title Spiral structure in the outer galactic disk. I. The third galactic quadrant
title_short Spiral structure in the outer galactic disk. I. The third galactic quadrant
title_full Spiral structure in the outer galactic disk. I. The third galactic quadrant
title_fullStr Spiral structure in the outer galactic disk. I. The third galactic quadrant
title_full_unstemmed Spiral structure in the outer galactic disk. I. The third galactic quadrant
title_sort spiral structure in the outer galactic disk. i. the third galactic quadrant
publishDate 2008
url http://sedici.unlp.edu.ar/handle/10915/84323
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