English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/110437
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

A multi-wavelength view of the central kiloparsec region in the luminous infrared galaxy NGC 1614

AutorHerrero-Illana, Rubén ; Pérez-Torres, Miguel A. ; Alonso-Herrero, A. ; Alberdi, Antxón ; Colina, Luis ; Hernández-García, Lorena ; Packham, Christopher
Fecha de publicación2014
EditorAmerican Astronomical Society
Institute of Physics Publishing
CitaciónAstrophysical Journal 786(2): 156 (2014)
ResumenThe Luminous Infrared Galaxy NGC 1614 hosts a prominent circumnuclear ring of star formation. However, the nature of the dominant emitting mechanism in its central ∼100 pc is still under debate. We present sub-arcsecond angular resolution radio, mid-infrared, Paα, optical, and X-ray observations of NGC 1614, aimed at studying in detail both the circumnuclear ring and the nuclear region. The 8.4 GHz continuum emission traced by the Very Large Array and the Gemini/T-ReCS 8.7μm emission, as well as the Paα line emission, show remarkable morphological similarities within the star-forming ring, suggesting that the underlying emission mechanisms are tightly related. We used a Hubble Space Telescope/NICMOS Paα map of similar resolution to our radio maps to disentangle the thermal free-free and non-thermal synchrotron radio emission, from which we obtained the intrinsic synchrotron power law for each individual region within the central kiloparsec of NGC 1614. The radio ring surrounds a relatively faint, steep-spectrum source at the very center of the galaxy, suggesting that the central source is not powered by an active galactic nucleus (AGN), but rather by a compact (r ≲ 90 pc) starburst (SB). Chandra X-ray data also show that the central kiloparsec region is dominated by SB activity, without requiring the existence of an AGN.We also used publicly available infrared data to model-fit the spectral energy distribution of both the SB ring and a putative AGN in NGC 1614. In summary, we conclude that there is no need to invoke an AGN to explain the observed bolometric properties of the galaxy.
DescripciónarXiv:1403.7201.-- Herrero-Illana et al.
Versión del editorhttp://dx.doi.org/10.1088/0004-637X/786/2/156
Identificadoresdoi: 10.1088/0004-637X/786/2/156
issn: 0004-637X
e-issn: 1538-4357
Aparece en las colecciones: (IAA) Artículos
(IFCA) Artículos
(CAB) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
INFRARED GALAXY NGC 1614.pdf997,81 kBAdobe PDFVista previa
Mostrar el registro completo

Artículos relacionados:

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.