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26 April 2024 |
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Spatial resolution bias in the mid-infrared Starburst/AGN classification | | O. Laurent
; I.F. Mirabel
; V. Charmandaris
; P. Gallais
; M. Sauvage
; L. Vigroux
; C. Cesarsky
; | | Date: |
18 May 2000 | | Subject: | astro-ph | | Affiliation: | 1,2), I.F. Mirabel (1,3), V. Charmandaris (4,5), P. Gallais , M. Sauvage , L. Vigroux and C. Cesarsky (1,6) (SAp, Saclay, France, MPE, Garching, Germany, Instituto de Astronomia, Buenos Aires, Argentina, DEMIRM, France, Cornell, US, ESO, Garchin | | Abstract: | We present the effects of limited spatial resolution to the observed mid-infrared (MIR) spectrum of an active galactic nucleus (AGN) surrounded by a disk with massive star forming regions. Using MIR observations of the face-on nearby Seyfert 1 galaxy NGC 6814, we vary the observing aperture and examine the evolution of the observed AGN/starburst fraction with our MIR diagnostic. We show that the spatial resolution of ISOCAM is sufficient to disentangle AGN from starburst features in nuclear regions of nearby galaxies (D<50Mpc). However, with the exception of a few ultra-luminous galaxies, dilution effects hide completely the AGN contribution in more distant galaxies. | | Source: | arXiv, astro-ph/0005377 | | Services: | Forum | Review | PDF | Favorites | |
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