NGC 3503 and its molecular environment
<b>Aims.</b> We present a study of the molecular gas and interstellar dust distribution in the environs of the Hiiπ region NGC 3503 associated with the open cluster Pis 17 with the aim of investigating the spatial distribution of the molecular gas linked to the nebula and achieving a bet...
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2012
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/84622 |
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I19-R120-10915-84622 |
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dspace |
| institution |
Universidad Nacional de La Plata |
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I-19 |
| repository_str |
R-120 |
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SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Astronómicas HII regions ISM: clouds ISM: kinematics and dynamics ISM: molecules Photon-dominated region (PDR) Radio continuum: ISM |
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Ciencias Astronómicas HII regions ISM: clouds ISM: kinematics and dynamics ISM: molecules Photon-dominated region (PDR) Radio continuum: ISM Duronea, Nicolás Urbano Vasquez, Javier Cappa, Cristina Elisabet Corti, Mariela Alejandra Arnal, Edmundo Marcelo NGC 3503 and its molecular environment |
| topic_facet |
Ciencias Astronómicas HII regions ISM: clouds ISM: kinematics and dynamics ISM: molecules Photon-dominated region (PDR) Radio continuum: ISM |
| description |
<b>Aims.</b> We present a study of the molecular gas and interstellar dust distribution in the environs of the Hiiπ region NGC 3503 associated with the open cluster Pis 17 with the aim of investigating the spatial distribution of the molecular gas linked to the nebula and achieving a better understanding of the interaction of the nebula and Pis 17 with their molecular environment.
<b>Methods.</b> We based our study on 12CO(1-0) observations of a region of ∼0°6 in size obtained with the 4-m NANTEN telescope, unpublished radio continuum data at 4800 and 8640 MHz obtained with the ATCA telescope, radio continuum data at 843 MHz obtained from SUMSS, and available IRAS, MSX, IRAC-GLIMPSE, and MIPSGAL images.
<b>Results.</b> We found a molecular cloud (Component 1) having a mean velocity of -24.7 km s -1 ,compatible with the velocity of the ionized gas, which is associated with the nebula and its surroundings. Adopting a distance of 2.9 ± 0.4 kpc, the total molecular mass yields (7.6 ± 2.1) × 10 3M⊙ and density yields 400 ± 240 cm -3. The radio continuum data confirm the existence of an electron density gradient in NGC 3503. The IR emission shows a PDR bordering the higher density regions of the nebula. The spatial distribution of the CO emission shows that the nebula coincides with a molecular clump, and the strongest CO emission peak is located close to the higher electron density region. The more negative velocities of the molecular gas (about -27 km s -1), are coincident with NGC 3503. Candidate young stellar objects (YSOs) were detected toward the Hii region, suggesting that embedded star formation may be occurring in the neighborhood of the nebula. The clear electron density gradient, along with the spatial distribution of the molecular gas and PAHs in the region indicates that NGC 3503 is a blister-type Hii region that has probably undergone a champagne phase. |
| format |
Articulo Articulo |
| author |
Duronea, Nicolás Urbano Vasquez, Javier Cappa, Cristina Elisabet Corti, Mariela Alejandra Arnal, Edmundo Marcelo |
| author_facet |
Duronea, Nicolás Urbano Vasquez, Javier Cappa, Cristina Elisabet Corti, Mariela Alejandra Arnal, Edmundo Marcelo |
| author_sort |
Duronea, Nicolás Urbano |
| title |
NGC 3503 and its molecular environment |
| title_short |
NGC 3503 and its molecular environment |
| title_full |
NGC 3503 and its molecular environment |
| title_fullStr |
NGC 3503 and its molecular environment |
| title_full_unstemmed |
NGC 3503 and its molecular environment |
| title_sort |
ngc 3503 and its molecular environment |
| publishDate |
2012 |
| url |
http://sedici.unlp.edu.ar/handle/10915/84622 |
| work_keys_str_mv |
AT duroneanicolasurbano ngc3503anditsmolecularenvironment AT vasquezjavier ngc3503anditsmolecularenvironment AT cappacristinaelisabet ngc3503anditsmolecularenvironment AT cortimarielaalejandra ngc3503anditsmolecularenvironment AT arnaledmundomarcelo ngc3503anditsmolecularenvironment |
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Repositorios |
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1764820488991801344 |