EDP Sciences
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Volume 395, Number 2, November IV 2002
Page(s) 423 - 429
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20021331

A&A 395, 423-429 (2002)
DOI: 10.1051/0004-6361:20021331

PB 9493-9494 intertacting galaxies: The correlation of IRAS sources with close pairs of PB UVe objects

H. Reboul1 and C. Vanderriest2

1  UMR 5024, CNRS-Université Montpellier 2, GRAAL, CC 72, 34095 Montpellier Cedex 5, France
2  UMR 8631, CNRS-DAEC, Observatoire de Paris, 92195 Meudon, France

(Received 12 September 2000 / Accepted 22 August 2002 )

The cross-correlation of close pairs of UV-excess objects from the Berger-Fringant catalogue with IRAS sources supplies three cases. The first two are already known objects. We study in detail the most interesting (and new) case: PB 9493-9494. Optical observations in direct imaging and in integral field spectrography confirm that this system is a pair of strongly interacting galaxies with starbursts and show the complex structure of an evolved but not merged encounter. Although such an evolution step is only intermediate, the brightest nucleus (PB 9494) may be on the verge of becoming an AGN. We discuss the peculiarities of this system with regard to optical versus far infrared behaviour, in connection with its special mode of selection.

Key words: galaxies: individual: PB 9494, PB 9493 -- galaxies: interactions -- galaxies: starburst -- ultraviolet: galaxies -- infrared: galaxies

Offprint request: H. Reboul, reboul@graal.univ-montp2.fr

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