SIMBAD references

2014MNRAS.443.2766A - Mon. Not. R. Astron. Soc., 443, 2766-2782 (2014/September-3)

Nuclear 11.3µm PAH emission in local active galactic nuclei.

ALONSO-HERRERO A., RAMOS ALMEIDA C., ESQUEJ P., ROCHE P.F., HERNAN-CABALLERO A., HONIG S.F., GONZALEZ-MARTIN O., ARETXAGA I., MASON R.E., PACKHAM C., LEVENSON N.A., RODRIGUEZ ESPINOSA J.M., SIEBENMORGEN R., PEREIRA-SANTAELLA M., DIAZ-SANTOS T., COLINA L., ALVAREZ C. and TELESCO C.M.

Abstract (from CDS):

We present Gran Telescopio CANARIAS CanariCam 8.7µm imaging and 7.5-13µm spectroscopy of six local systems known to host an active galactic nucleus (AGN) and have nuclear star formation. Our main goal is to investigate whether the molecules responsible for the 11.3µm polycyclic aromatic hydrocarbon (PAH) feature are destroyed in the close vicinity of an AGN. We detect 11.3µm PAH feature emission in the nuclear regions of the galaxies as well as extended PAH emission over a few hundred parsecs. The equivalent width (EW) of the feature shows a minimum at the nucleus but increases with increasing radial distances, reaching typical star-forming values a few hundred parsecs away from the nucleus. The reduced nuclear EWs are interpreted as due to increased dilution from the AGN continuum rather than destruction of the PAH molecules. We conclude that at least those molecules responsible for the 11.3µm PAH feature survive in the nuclear environments as close as 10pc from the AGN and for Seyfert-like AGN luminosities. We propose that material in the dusty tori, nuclear gas discs, and/or host galaxies of AGN is likely to provide the column densities necessary to protect the PAH molecules from the AGN radiation field.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): galaxies: active - galaxies: individual: Mrk 1066 - galaxies: individual: Mrk 1073 - galaxies: individual: NGC 2273 - galaxies: individual: Arp 299 - galaxies: individual: NGC 6240 - galaxies: individual: IRAS 17208-0014 - galaxies: Seyfert - infrared: galaxies

Simbad objects: 26

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2021.01.25-13:19:11

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