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Astron. Astrophys. 315, L105-L108 (1996)

ISO observations of Wolf-Rayet galaxy Haro 3*

L. Metcalfe1, S. J. Steel3, P. Barr1, J. Clavel1, M. Delaney3, P. Gallais1,2, R. J. Laureijs1, K. Leech1, B. McBreen3, S. Ott1, N. Smith4, and L. Hanlon 3

1 ISO Science Operations Centre, Astrophysics Division of ESA, Villafranca, Spain
2 CEA, DSM/DAPNIA, CE-Saclay, F-91191 Gif-sur-Yvette Cedex, France
3 Physics Department, University College, Belfield, Dublin 4, Ireland
4 Regional Technical College, Rossa Ave., Cork, Ireland

Received 16 July 196 / Accepted 13 August 1996

Abstract. Observations of the blue compact dwarf galaxy Haro 3 have been obtained with the ISOCAM and ISOPHOT instruments on the Infrared Space Observatory (ISO). The PHT-S spectrum (6-12  img1.gifm) is dominated by four emission bands that are frequently attributed to polycyclic aromatic hydrocarbons (PAHs) and strong SIV emission. Two CAM filters, LW6 (7-8.5  img1.gifm) and LW3 (12-18  img1.gifm) were used to map the galaxy. The LW6 image is essentially a map of the galaxy in the 7.7  img1.gifm PAH feature. The emission in both maps is extended and matches very well a map of the H img2.gif emission. Both maps show coincident single peak emission and a spatial correspondance with the nuclear region of the galaxy and the brightest optical region, an off-axis starburst containing Wolf-Rayet stars. A ratio map of LW6/LW3 images shows two peaks on a ridge elongated along the optical axis of the galaxy.

Key words: infrared: galaxies: individual: Haro 3 - galaxies: starburst - ISM: molecules - ISM: dust

* ISO is an ESA project with instruments funded by ESA Member States (especially the PI countries: France, Germany, the Netherlands and the United Kingdom) and with the participation of ISAS and NASA.

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Last change: December 16, 1996
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