English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/140453
Share/Impact:
Statistics
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:
Title

A mid-infrared spectroscopic atlas of local active galactic nuclei on sub-arcsecond resolution using GTC/CanariCam

AuthorsAlonso-Herrero, A. ; Esquej, Pilar ; Roche, P. F.; Ramos-Almeida, Cristina; González-Martín, Omaira ; Packham, Christopher; Levenson, N.; Mason, R. E.; Hernán-Caballero, Antonio ; Pereira-Santaella, Miguel ; Aretxaga, I.; López-Rodríguez, E.; Colina, Luis ; Díaz-Santos, T. ; Imanishi, Masatoshi; Rodríguez-Espinosa, J. M.; Perlman, E.
KeywordsGalaxies: active
Quasars: general
Galaxies: Seyfert
Infrared: galaxies
Issue Date2016
PublisherOxford University Press
CitationMonthly Notices of the Royal Astronomical Society 455(1): 563-583 (2016)
AbstractWe present an atlas of mid-infrared (mid-IR) ~7.5-13 μm spectra of 45 local active galactic nuclei (AGN) obtained with CanariCam on the 10.4 m Gran Telescopio CANARIAS (GTC) as part of an ESO/GTC large programme. The sample includes Seyferts and other lowluminosity AGN (LLAGN) at a median distance of 35 Mpc and luminous AGN, namely PG quasars, (U)LIRGs, and radio galaxies (RG) at a median distance of 254 Mpc. To date, this is the largest mid-IR spectroscopic catalogue of local AGN at sub-arcsecond resolution (median 0.3 arcsec). The goal of this work is to give an overview of the spectroscopic properties of the sample. The nuclear 12 μm luminosities of the AGN span more than four orders of magnitude, νL ~ 3 × 10-10 erg s. In a simple mid-IR spectral index versus strength of the 9.7 μm silicate feature diagram most LLAGN, Seyfert nuclei, PG quasars, and RGs lie in the region occupied by clumpy torus model tracks. However, the mid-IR spectra of some might include contributions from other mechanisms. Most (U)LIRG nuclei in our sample have deeper silicate features and flatter spectral indices than predicted by these models suggesting deeply embedded dust heating sources and/or contribution from star formation. The 11.3 μm polycyclic aromatic hydrocarbon (PAH) feature is clearly detected in approximately half of the Seyfert nuclei, LLAGN, and (U)LIRGs. While the RG, PG quasars, and (U)LIRGs in our sample have similar nuclear νL, we do not detect nuclear PAH emission in the RGs and PG quasars.
Publisher version (URL)https://doi.org/10.1093/mnras/stv2342
URIhttp://hdl.handle.net/10261/140453
DOI10.1093/mnras/stv2342
Identifiersdoi: 10.1093/mnras/stv2342
e-issn: 1365-2966
issn: 0035-8711
Appears in Collections:(CAB) Artículos
(IFCA) Artículos
Files in This Item:
File Description SizeFormat 
MNRASCanariCam.pdf2,09 MBAdobe PDFThumbnail
View/Open
Show full item record
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.