The European Large Area ISO Survey VI - Discovery of a new hyperluminous infrared galaxy

Details The European Large Area ISO Survey VI - Discovery of a new hyperluminous infrared galaxy The European Large Area ISO Survey VI - Discovery of a new hyperluminous infrared galaxy

2001-07-09

arxiv.org/abs/astro-ph/0107148v1

Mon.Not.Roy.Astron.Soc. 327 (2001) 1187

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figures; accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.2001.04803.x

We report the discovery of the first hyperluminous infrared galaxy (HyLIG) in the course of the European Large Area ISO Survey (ELAIS). This object has been detected by ISO at 6.7, 15, and 90 microns, and is found to be a broad-line, radio-quiet quasar at a redshift: z = 1.099. From a detailed multi-component model fit of the spectral energy distribution, we derive a total infrared luminosity: L_IR (1-1000 microns) ~ 1.0 x 10E13 h_65^-2 L_sun (q_0 = 0.5), and discuss the possible existence of a starburst contributing to the far-IR output. Observations to date present no evidence for lens magnification. This galaxy is one of the very few HyLIGs with an X-ray detection. On the basis of its soft X-ray properties, we suggest that this broad-line object may be the face-on analogue of narrow-line, Seyfert-like HyLIGs.

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