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Astron. Astrophys. 315, L121-L124 (1996)

The starburst galaxy NGC 6090: from 2.5 tex2html_wrap_inline35m to 200 img1.gifm*

J.A. Acosta-Pulido1,2,3, U. Klaas1,2, R.J. Laureijs2, B. Schulz2, U. Kinkel1,2, P. Ábrahám1,6, H.O. Castañeda1,2,3, L. Cornwall2,4, C. Gabriel2, I. Heinrichsen2,5, U. Herbstmeier1, H. Krüger1, and G. Pelz1,2

1 Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany
2 ISO Science Operations Centre, Astrophysics Division of ESA, VILSPA, Aptdo. Correos 50727, E-28080 Madrid, Spain
3 Instituto de Astrofísica de Canarias, E-38200 La Laguna, Spain
4 CLRC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, UK
5 Max-Planck-Institut für Kernphysik, Saupferscheckweg 1, D-69117 Heidelberg, Germany
6 Konkoly Observatory of the Hungarian Academy of Sciences, P.O. Box 67, H-1525 Budapest, Hungary

Received 15 July 1996 / Accepted 13 August 1996

Abstract. We have carried out broad band photometry of the interacting galaxy system NGC 6090 from 3.6 to 200 img2.gif using ISOPHOT. This is complemented by a low resolution spectrum in the wavelength range 2.5-11.5 img3.gif The IR spectral energy distribution of a starburst galaxy is shown with unprecedented detail. From our Far Infrared measurements we can demonstrate that the starburst component is the dominating energy source in this object. img4.gif of the total IR output is in the wavelength range below 120  img2.gif , while img5.gif is in the 120 to 240  img2.gif range. Emission in the PAH bands is an essential radiation mechanism in the wavelength range shortward of img6.gif for this object. We discuss various published starburst models and their applicability to NGC 6090.

Key words: galaxies individual - NGC 6090 - galaxies starburst - galaxies interactions - infrared galaxies

* 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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