About
Contact
Help
Sending publications
How to publish
Advanced Search
View Item 
  •   Home
  • Facultad de Ciencias Físicas y Matemáticas
  • Artículos de revistas
  • View Item
  •   Home
  • Facultad de Ciencias Físicas y Matemáticas
  • Artículos de revistas
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Browse byCommunities and CollectionsDateAuthorsTitlesSubjectsThis CollectionDateAuthorsTitlesSubjects

My Account

Login to my accountRegister
Biblioteca Digital - Universidad de Chile
Revistas Chilenas
Repositorios Latinoamericanos
Tesis LatinoAmericanas
Tesis chilenas
Related linksRegistry of Open Access RepositoriesOpenDOARGoogle scholarCOREBASE
My Account
Login to my accountRegister

SMA millimeter observations of hot molecular cores

Artículo
Thumbnail
Open/Download
IconSMA-Millimeter-Observation-of-hot-molecular-Cores.pdf (1.840Mb)
Publication date
2014-05-07
Metadata
Show full item record
Cómo citar
Hernández-Hernández, Vicente
Cómo citar
SMA millimeter observations of hot molecular cores
.
Copiar
Cerrar

Author
  • Hernández-Hernández, Vicente;
  • Zapata, Luis;
  • Kurtz, Stan;
  • Garay Brignardello, Guido;
Abstract
We present Submillimeter Array observations in the 1.3 mm continuum and the CH3CN (12K–11K) line of 17 hot molecular cores associated with young high-mass stars. The angular resolution of the observations ranges from 1. 0 to 4. 0. The continuum observations reveal large (>3500 AU) dusty structures with gas masses from 7 to 375 M , which probably surround multiple young stars. The CH3CN line emission is detected toward all the molecular cores at least up to the K = 6 component and is mostly associated with the emission peaks of the dusty objects. We used the multiple K-components of the CH3CN and both the rotational diagram method and a simultaneous synthetic local thermodynamic equilibrium model with the XCLASS program to estimate the temperatures and column densities of the cores. For all sources, we obtained reasonable fits from XCLASS by using a model that combines two components: an extended and warm envelope and a compact hot core of molecular gas, suggesting internal heating by recently formed massive stars. The rotational temperatures lie in the range of 40–132 K and 122–485 K for the extended and compact components, respectively. From the continuum and CH3CN results, we infer fractional abundances from 10−9 to 10−7 toward the compact inner components, which increase with the rotational temperature. Our results agree with a chemical scenario in which the CH3CN molecule is efficiently formed in the gas phase above 100–300 K, and its abundance increases with temperature.
General note
Artículo de Publicación ISI.
Identifier
URI: https://repositorio.uchile.cl/handle/2250/126476
DOI: doi:10.1088/0004-637X/786/1/38
Quote Item
The Astrophysical Journal, 786:38 (17pp), 2014 May 1
Collections
  • Artículos de revistas
xmlui.footer.title
31 participating institutions
More than 73,000 publications
More than 110,000 topics
More than 75,000 authors
Published in the repository
  • How to publish
  • Definitions
  • Copyright
  • Frequent questions
Documents
  • Dating Guide
  • Thesis authorization
  • Document authorization
  • How to prepare a thesis (PDF)
Services
  • Digital library
  • Chilean academic journals portal
  • Latin American Repository Network
  • Latin American theses
  • Chilean theses
Dirección de Servicios de Información y Bibliotecas (SISIB)
Universidad de Chile

© 2020 DSpace
  • Access my account