Study of a bright-rimmed cloud at the border of the infrared dust bubble CN20

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...

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Detalles Bibliográficos
Publicado: 2016
Materias:
H ii regions
ISM: Clouds
Stars: Formation
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v458_n4_p3684_Ortega
http://hdl.handle.net/20.500.12110/paper_00358711_v458_n4_p3684_Ortega
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00358711_v458_n4_p3684_Ortega
record_format dspace
spelling paper:paper_00358711_v458_n4_p3684_Ortega2023-06-08T15:01:42Z Study of a bright-rimmed cloud at the border of the infrared dust bubble CN20 H ii regions ISM: Clouds Stars: Formation 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. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v458_n4_p3684_Ortega http://hdl.handle.net/20.500.12110/paper_00358711_v458_n4_p3684_Ortega
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic H ii regions
ISM: Clouds
Stars: Formation
spellingShingle H ii regions
ISM: Clouds
Stars: Formation
Study of a bright-rimmed cloud at the border of the infrared dust bubble CN20
topic_facet H ii regions
ISM: Clouds
Stars: Formation
description 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.
title Study of a bright-rimmed cloud at the border of the infrared dust bubble CN20
title_short Study of a bright-rimmed cloud at the border of the infrared dust bubble CN20
title_full Study of a bright-rimmed cloud at the border of the infrared dust bubble CN20
title_fullStr Study of a bright-rimmed cloud at the border of the infrared dust bubble CN20
title_full_unstemmed Study of a bright-rimmed cloud at the border of the infrared dust bubble CN20
title_sort study of a bright-rimmed cloud at the border of the infrared dust bubble cn20
publishDate 2016
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v458_n4_p3684_Ortega
http://hdl.handle.net/20.500.12110/paper_00358711_v458_n4_p3684_Ortega
_version_ 1768545500771909632

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