Search Publications

ISO Far-IR spectroscopy of IR-bright galaxies and ULIRGs

Malkan, M. A.; Spinoglio, L.; Lord, S. D. +16 more

Based on far-infrared spectroscopy of a small sample of nearbyinfrared-bright and ultraluminous infrared galaxies (ULIRGs) with theISO Long Wavelength Spectrometer we find adramatic progression in ionic/atomic fine-structure emission line andmolecular/atomic absorption line characteristics in these galaxiesextending from strong [O III]52,88 µ…

The Mid-IR view of interacting galaxies

Cesarsky, C.; Sauvage, M.; Vigroux, L. +5 more

In this paper, we present ISOCAM mid-IR broad band images and spectraof three well known interacting galaxies. These are the prototypicalultraluminous IR galaxy Arp 220, and NGC 6240, which are classifiedas major mergers resulting from a collision of two disk galaxies ofapproximately equal mass, and the prime example of collisional ringgalaxies, t…

ISO Spectroscopy of Ultraluminous Infrared Galaxies

Lutz, D.; Genzel, R.; Sturm, E. +5 more

Spectroscopy from the Infrared Space Observatory ISO has for the first timeprovided the sensitivity to exploit the diagnostic power ofmid-infrared fine structure lines and PAH features for the study ofultraluminous infrared galaxies (L_IR >10¹²L_⊙). We report on observations obtainedwith SWS, ISOPHOT-S, and the CV…

ISOCAM cosmological Surveys

Aussel, H.; Elbaz, D.; Cesarsky, C. J.

Several deep surveys have been performed at 7 and 15 µm by using the mid-infrared camera ISOCAM on board the ISO satellite. We review their first results, emphasizing on the excess detected in the 15 µm counts with respect to the predictions of models with a mild evolution that is sufficient to explain the IRAS counts. We point out tha…

Soft X-ray properties of Ultraluminous IRAS Galaxies

Boller, Th.

A sample of 323 Ultraluminous IRAS galaxies (ULIRGs) has been correlatedwith the ROSAT All-Sky Survey and ROSAT public pointed observations.22 objects are detected in ROSAT survey observations, and 6 ULIRGs aredetected in addition in ROSAT public pointed observations. The detection is basedon a visual inspection of the X-ray contour maps overlaid …

ISO Far-Infrared Deep Survey of the Lockman Hole

Kawara, K.; Taniguchi, Y.; Matsuhara, H.

The AGNS and their host galaxies as seen in the mid-infrared

Cesarsky, C.; Sauvage, M.; Vigroux, L. +4 more

We present a new diagnostic diagram based on ISOCAMspectra (5-16 µm) to distinguish the emission inducedby the active galactic nucleus (AGN) from that associated with thestar formation activity. This diagnostic based on the mid-IRcontinuum and the Unidentified Infrared Band (UIB) intensity allowsus to estimate the relative importance of the …

Ultraluminous Infrared Galaxies: Far-Infrared Highlights

Clements, D. L.

We discuss two significant recent developments in the far-IRwith relevance to the study of Ultraluminous Infrared Galaxies(ULIRGs). The first of these is the discovery of an isotropiccosmological infrared background radiation (CIB). This has beendetected in observations by two different instruments (FIRAS (Puget etal. 1996, Hauser et al. 1998) and…

Active galaxies in the mid-infrared

Lutz, D.; Genzel, R.; Sturm, E. +4 more