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Astron. Astrophys. 334, L21-L25 (1998)

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Letter to the Editor

Deep ISOCAM view of the core of the lensing cluster A2390

L. Lémonon 1, M. Pierre 1, C.J. Cesarsky 1, D. Elbaz 1, R. Pelló 2, G. Soucail 2 and L. Vigroux 1

1 DAPNIA/Service d'Astrophysique, CEA/Saclay F-91191 Gif-sur-Yvette, Cedex, France
2 Observatoire Midi-Pyrénées, Laboratoire d'Astrophysique - UMR 5572, 14 Avenue E. Belin, F-31400 Toulouse, France

Received 23 February 1998 / Accepted 8 April 1998


We have imaged the inner square arcminute of the well known lensing and cooling flow cluster A2390 ([FORMULA]) down to a sensitivity of 65 and 130 µJy at 6.75 and 15 µm, respectively. We report the first evidence of an active star-forming region in a cooling flow (at those wavelengths) and strong emission in the mid-IR from lensed galaxies located at [FORMULA].

Key words: galaxies: clusters: individual: Abell 2390 – galaxies: cooling flows – cosmology: gravitational lensing – infrared: galaxies – galaxies: stellar contents – galaxies: structure

Send offprint requests to: L. Lémonon; ludovic.lemonon@cea.fr

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© European Southern Observatory (ESO) 1998

Online publication: May 12, 1998