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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 421493.0, MPI für Astronomie / Publikationen_mpia
The core flux of the brightest 10 μm galaxies in the southern sky
Authors:Raban, D.; Heijligers, B.; Röttgering, H.; Meisenheimer, K.; Jaffe, W.; Käufl, H. U.; Henning, T.
Language:English
Date of Publication (YYYY-MM-DD):2008
Title of Journal:Astronomy and Astrophysics
Volume:484
Start Page:341
End Page:345
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Aims. Near diffraction-limited images have been taken at 8.9, 11.9, and 12.9 mum for the brightest extragalactic sources in the southern sky, in order to optimally plan N-band observations with MIDI (MID-infrared Interferometric instrument) at the VLTI. Methods: We have assembled a sample of 21 objects consisting of all the AGNs observable from Paranal observatory, Chile, plus three non-AGN objects, with an estimated N-band flux greater than 400 mJy. We used the TIMMI2 Mid Infrared instrument mounted on the ESO's 3.6 m telescope to obtain near diffraction-limited images in order to establish the unresolved core flux within <0.5 arscsec. Results: Positions and core total fluxes were obtained for all sources in our sample and compared with similar investigations in the literature. We find that 15 AGN and the nuclear starburst in NGC 253 exhibit an unresolved core flux <300 mJy at 11.9 mum, making them promising targets for MIDI at the VLTI. For extended sources, near diffraction-limited images are presented and discussed. Based on observations collected at the European Southern Observatory, Chile, programme numbers 67.B-0582, 68.B-0575, 68.B-0033. Appendix is only available in electronic form at http://www.aanda.org
Free Keywords:techniques: photometric; galaxies: active; galaxies: nuclei; galaxies: Seyfert; infrared: galaxies
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2008A%26A...484..341... [ID No:1]
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