Mid-FIR Properties of ELAIS Sources

I. Márquez , J. Masegosa , T. Morel (1) , A. Efstathiou , A. Verma (2) , P. Vaisanen , D. Alexander , P. Héraudeau , C. Surace (3) , I. Pérez-Fournon (4) , F. Cabrera-Guerra , J.~i. González-Serrano , E.~a. González-Solares , S. Serjeant (5) , S.~j. Oliver , M. Rowan-Robinson (6) , Elais Consortium

1 LTPCM - Laboratoire de thermodynamique et physico-chimie métallurgiques
2 Oxford Astrophysics
3 LAM - Laboratoire d'Astrophysique de Marseille
4 IAC - Instituto de Astrofisica de Canarias
5 Department of Physics and Astronomy [Milton Keynes]
6 Imperial College London

We present the properties of all the galaxies detected by ISO at 7, 15 and 90 microns in ELAIS northern fields. The spectral energy distribution (SED) of those 20 galaxies with IRAS detections can generally be well fitted by a predominant cirrus component plus a modest starburst contribution. Follow-up spectroscopy has shown that all the objects are emission-line galaxies but without a very intense star formation event. Most of the galaxies analyzed by means of optical R band photometry result to host an important exponential disk component, in good agreement with the SED IR modelling. We note that galaxies with morphological signs of perturbations seem to show slightly higher f_15/f_6.7 ratios, indicating that star formation could be more important in them. One of the objects is a broad-line, radio-quiet quasar at z=1.099; its spectral energy distribution indicates that it is a hyperluminous infrared galaxy (HLIG), the first HLIG detected in the ELAIS areas.

Mots clés: GALAXIES: INFRARED: COLORS; GALAXIES: SURVEYS; GALAXIES: STARBURSTS; ACTIVE

Domaines: Astrophysique [astro-ph]; Informatique [cs]

I. Márquez, J. Masegosa, T. Morel, A. Efstathiou, A. Verma, et al.. Mid-FIR Properties of ELAIS Sources. The Promise of the Herschel Space Observatory, 2001, Unknown, Unknown Region. pp.147. ⟨hal-01437387⟩