TY - GEN
T1 - The mid-infrared emission of a complete sample of Seyfert galaxies
AU - García-Bernete, I.
AU - Ramos Almeida, C.
AU - Acosta-Pulido, J. A.
AU - Alonso-Herrero, A.
AU - González-Martín, O.
AU - Hernán-Caballero, A.
AU - Pereira-Santaella, M.
AU - Levenson, N. A.
AU - Packham, C.
AU - Perlman, E. S.
AU - Ichikawa, K.
AU - Esquej, P.
AU - Díaz-Santos, T.
N1 - Funding Information:
IGB acknowledges financial support from the Instituto de Astrofísica de Canarias through Fundación La Caixa. IGB acknowledge financial support from the Spanish Ministry of Science and Innovation (MICINN) through project PN AYA2013-47742-C4-2-P.
Publisher Copyright:
© 2016 Proceedings of the 12th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics IX, SEA 2016. All rights reserved.
PY - 2016
Y1 - 2016
N2 - We present subarcsecond resolution mid-infrared (MIR) images obtained with 8-10 m-class ground-based telescopes of a complete volume-limited (DL <40 Mpc) sample of 24 Seyfert galaxies selected from the Swift/BAT nine month catalog. We use those MIR images to study the nuclear and circumnuclear emission of the galaxies. Using different methods to classify the MIR morphologies on scales of ∼400 pc, we find that the majority of the galaxies (75-83%) are extended or possibly extended and 17-25% are point-like. This extended emission is compact and it has low surface brightness compared with the nuclear emission, and it represents, on average, ∼30 % of the total MIR emission of the galaxies in the sample. We find that the galaxies whose circumnuclear MIR emission is dominated by star formation show more extended emission (650±700pc) than AGN-dominated systems (300±100pc). In general, the galaxies with point-like MIR morphologies are face-on or moderately inclined (b/a ∼0.4-1.0), and we do not find significant differences between the morphologies of Sy1 and Sy2. We used the nuclear and circumnuclear fluxes to investigate their correlation with different AGN and SF activity indicators. We find that the nuclear MIR emission (the inner ∼70 pc) is strongly correlated with the X-ray emission (the harder the X-rays the better the correlation) and with the [OIV] λ25.89 μm emission line, indicating that it is AGN-dominated. We find the same results, although with more scatter, for the circumnuclear emission, which indicates that the AGN dominates the MIR emission in the inner ∼400 pc of the galaxies, with some contribution from star formation.
AB - We present subarcsecond resolution mid-infrared (MIR) images obtained with 8-10 m-class ground-based telescopes of a complete volume-limited (DL <40 Mpc) sample of 24 Seyfert galaxies selected from the Swift/BAT nine month catalog. We use those MIR images to study the nuclear and circumnuclear emission of the galaxies. Using different methods to classify the MIR morphologies on scales of ∼400 pc, we find that the majority of the galaxies (75-83%) are extended or possibly extended and 17-25% are point-like. This extended emission is compact and it has low surface brightness compared with the nuclear emission, and it represents, on average, ∼30 % of the total MIR emission of the galaxies in the sample. We find that the galaxies whose circumnuclear MIR emission is dominated by star formation show more extended emission (650±700pc) than AGN-dominated systems (300±100pc). In general, the galaxies with point-like MIR morphologies are face-on or moderately inclined (b/a ∼0.4-1.0), and we do not find significant differences between the morphologies of Sy1 and Sy2. We used the nuclear and circumnuclear fluxes to investigate their correlation with different AGN and SF activity indicators. We find that the nuclear MIR emission (the inner ∼70 pc) is strongly correlated with the X-ray emission (the harder the X-rays the better the correlation) and with the [OIV] λ25.89 μm emission line, indicating that it is AGN-dominated. We find the same results, although with more scatter, for the circumnuclear emission, which indicates that the AGN dominates the MIR emission in the inner ∼400 pc of the galaxies, with some contribution from star formation.
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M3 - Conference contribution
AN - SCOPUS:85088164326
T3 - Proceedings of the 12th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics IX, SEA 2016
SP - 159
EP - 162
BT - Proceedings of the 12th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics IX, SEA 2016
A2 - Arribas, S.
A2 - Alonso-Herrero, A.
A2 - Figueras, F.
A2 - Hernandez-Monteagudo, C.
A2 - Sanchez-Lavega, A.
A2 - Perez-Hoyos, S.
PB - SEA
T2 - 12th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics IX, SEA 2016
Y2 - 18 July 2016 through 22 July 2016
ER -