Search Publications
ISO LWS observations of planetary nebula fine-structure lines
Barlow, M. J.; Cohen, M.; Liu, X. -W. +7 more
We have obtained 43-198µm far-infrared (IR) spectra for a sample of 51 Galactic planetary nebulae (PN) and protoplanetary nebulae (PPN), using the Long Wavelength Spectrometer (LWS) on board the Infrared Space Observatory (ISO). Spectra were also obtained of the former PN candidate Lo 14. The spectra yield fluxes for the fine-structure lines…
Circumstellar structure of RU Lupi down to au scales
Gledhill, T. M.; Hough, J. H.; Chrysostomou, A. +2 more
We have used the technique of spectro-astrometry to study the milliarcsecond scale structure of the emission lines in the T Tauri star RU Lupi. The wings of the Hα emission are found to be displaced from the star towards the south-west (blue wing) and north-east (red wing) with angular scales of 20-30mas. This structure is consistent with a bipola…
A new method for ISOCAM data reduction - I. Application to the European Large Area ISO Survey Southern Field: method and results
Aussel, H.; Pozzi, F.; Danese, L. +7 more
We develop a new data reduction technique for ISOCAM LW data and apply it to the European Large Area ISO Survey (ELAIS) LW3 (15-µm) observations in the southern hemisphere (S1). This method, known as LARI technique and based on the assumption of the existence of two different time-scales in ISOCAM transients (accounting for either fast or sl…
The European Large Area ISO Survey - IV. The preliminary 90-µm luminosity function
Rigopoulou, D.; Serjeant, S.; Morel, T. +11 more
We present the luminosity function of 90-µm-selected galaxies from the European Large Area ISO Survey (ELAIS), extending to z=0.3. Their luminosities are in the range 109< h 65 -2L/Lsolar<1012, i.e. non-ultraluminous. From our sample of 37 reliably detected galaxies in the ELAIS S1 region from the Efsta…
Chemical abundances of planetary nebulae from optical recombination lines - II. The neon abundance of NGC 7009
Barlow, M. J.; Liu, X. -W.; Luo, S. -G.
We present high-quality observations of Neii optical recombination lines (ORLs) for the bright Saturn Nebula NGC 7009. The measured line fluxes are used to determine Ne2+/H+ abundance ratios. The results derived from individual multiplets of the 3s-3p and 3p-3d configurations agree reasonably well, although values derived fro…
Cygnus X-3 with ISO: investigating the wind
Fender, R. P.; Ogley, R. N.; Bell Burnell, S. J.
We have observed the energetic binary Cygnus X-3 in both quiescent and flaring states between 4 and 16µm using the ISO satellite. We find that the quiescent source shows the thermal free-free spectrum typical of a hot, fast stellar wind, such as from a massive helium star. The quiescent mass-loss rate arising from a spherically symmetric, no…
The European Large Area ISO Survey - VI. Discovery of a new hyperluminous infrared galaxy
Pérez-Fournon, I.; Pozzi, F.; Alexander, D. M. +20 more
We report the discovery of the first hyperluminous infrared galaxy (HyLIG) in the course of the European Large Area ISO Survey (ELAIS). This object has been detected by ISO at 6.7, 15 and 90µm, and is found to be a broad-line, radio-quiet quasar at a redshift [formmu4]z=1.099. From a detailed multicomponent model fit of the spectral energy d…
The milliJansky 12-µm population: first follow-up
Clements, D. L.; Franceschini, A.; Desert, F. -X.
We present the first results of our follow-up programme of optical imaging and spectroscopy of a deep 12-µm survey conducted with the ISO satellite. We find that the objects are typically of fairly low redshift (z~0.1-0.2), but with a tail that extends to high redshifts. The highest redshift object is a previously unknown quasar at z=1.2. Th…