Abstract:
We characterize an uncatalogued bright-rimmed cloud located at the border of the infrared dust bubble CN20 with the aim of investigating triggered star formation. In order to do this, we carried out radio continuum observations at 8.9 GHz using the Jansky Very Large Array (JVLA) interferometer with a synthesized beam size of 13 arcsec × 5 arcsec, and molecular observations using the Atacama Submillimeter Telescope Experiment (ASTE) at the 13CO J = 3-2 and CS J = 7-6 transitions. An analysis of the molecular observations and of Herschel public data revealed the presence of a warm and dense clump with Tdust ~ 25 K and n(H2) ~ 3 × 105 cm-3. The high angular resolution and sensitivity of the new radio continuum data revealed an arc-like radio filament in excellent correspondence with the illuminated border of the bright-rimmed cloud. This ionized boundary layer has an electron density of 176 cm-3. The spatial distribution of the young stellar object candidates probably related to the bright-rimmed cloud does not show clear evidence of a triggered origin. Finally, based on the evaluation of the pressure balance between the ionized and molecular gas, we conclude that the ionization front has stalled at the surface of the clump. © 2016 The Authors.
Registro:
| Documento: |
Artículo
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| Título: | Study of a bright-rimmed cloud at the border of the infrared dust bubble CN20 |
| Autor: | Ortega, M.E.; Giacani, E.; Paron, S.; Rubio, M. |
| Filiación: | Instituto de Astronomía y Física del Espacio (IAFE), CC 67, Suc. 28, Buenos Aires, 1428, Argentina
FADU, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina
CBC, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina
Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
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| Palabras clave: | H ii regions; ISM: Clouds; Stars: Formation |
| Año: | 2016
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| Volumen: | 458
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| Número: | 4
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| Página de inicio: | 3684
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| Página de fin: | 3690
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| DOI: |
http://dx.doi.org/10.1093/mnras/stw317 |
| Título revista: | Monthly Notices of the Royal Astronomical Society
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| Título revista abreviado: | Mon. Not. R. Astron. Soc.
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| ISSN: | 00358711
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| CODEN: | MNRAA
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| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v458_n4_p3684_Ortega |
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Citas:
---------- APA ----------
Ortega, M.E., Giacani, E., Paron, S. & Rubio, M.
(2016)
. Study of a bright-rimmed cloud at the border of the infrared dust bubble CN20. Monthly Notices of the Royal Astronomical Society, 458(4), 3684-3690.
http://dx.doi.org/10.1093/mnras/stw317---------- CHICAGO ----------
Ortega, M.E., Giacani, E., Paron, S., Rubio, M.
"Study of a bright-rimmed cloud at the border of the infrared dust bubble CN20"
. Monthly Notices of the Royal Astronomical Society 458, no. 4
(2016) : 3684-3690.
http://dx.doi.org/10.1093/mnras/stw317---------- MLA ----------
Ortega, M.E., Giacani, E., Paron, S., Rubio, M.
"Study of a bright-rimmed cloud at the border of the infrared dust bubble CN20"
. Monthly Notices of the Royal Astronomical Society, vol. 458, no. 4, 2016, pp. 3684-3690.
http://dx.doi.org/10.1093/mnras/stw317---------- VANCOUVER ----------
Ortega, M.E., Giacani, E., Paron, S., Rubio, M. Study of a bright-rimmed cloud at the border of the infrared dust bubble CN20. Mon. Not. R. Astron. Soc. 2016;458(4):3684-3690.
http://dx.doi.org/10.1093/mnras/stw317
