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ISO observations of four active galaxies
Michel Dennefeld, Thomas Boller, Dimitra Rigopoulou +1
We present ISO PHOT-S spectra of four galaxies known or suspected to host a central AGN, selected from the initial Iras/Rosat sample of Boller et al. (1992). Two of them had no obv…
Mid-infrared spectral evidence for a luminous dust enshrouded source in Arp220
H. W. W. Spoon, A. F. M. Moorwood, D. Lutz +3
We have re-analyzed the 6-12 micron ISO spectrum of the ultra-luminous infrared galaxy Arp220 with the conclusion that it is not consistent with that of a scaled up version of a ty…
Mid-infrared emission of galactic nuclei: TIMMI2 versus ISO observations and models
R. Siebenmorgen, E. Kr"ugel, H. W. W. Spoon
We investigate the mid-infrared radiation of galaxies that are powered by a starburst or by an AGN. For this end, we compare the spectra obtained at different spatial scales in a s…
ISO spectroscopy of star formation and active nuclei in the luminous infrared galaxy NGC 6240
D. Lutz, E. Sturm, R. Genzel +4
We present Infrared Space Observatory mid- and far-infrared spectroscopy of the merging galaxy NGC 6240, an object presenting many aspects of importance for the role of star format…
Detection of strongly processed ice in the central starburst of NGC4945
H. W. W. Spoon, A. F. M. Moorwood, K. M. Pontoppidan +4
The composition of ice grains provides an important tool for the study of the molecular environment of star forming regions. Using ISAAC at the VLT to obtain spectra around 4.65 mi…