Search Publications
ISOCAM view of high energy sources.
Mirabel, I. F.; Boulade, O.; Claret, A. +2 more
We report the discovery of warm dust in the surroundings of the compact high energy sources SS433 and Cygnus X-1. In the jets of SS433 we have observed the infrared counterpart of the brighter X-ray knot at a distance of 50pc from the compact source. The observation reported here suggests that dust formation takes place in the ejecta, and that the…
Nonlinear variability of NGC 4151.
Longo, G.; Vio, R.; Rifatto, A. +2 more
We have collected all literature photometric data obtained in the B band for the Seyfert galaxy NGC4151 over the period 1910-1991, reduced them to the standard B_T_ photometric system and derived nuclear magnitudes by subtracting the light contribution from the underlying extended bulge component. The spectral analysis of the light curve shows no …
Time variable shocks in the UV: long term IUE monitoring of HH 29.
Liseau, R.; Huldtgren, M.; Fridlund, C. V. M. +1 more
We have used the IUE to the limit of its capability (~10^-15^erg/cm^2^/s/A) and present results based on long term monitoring in the UV of the Herbig-Haro object HH 29, which is dynamically coupled to the outflow activity from the deeply embedded low mass stellar object IRS5 in the L1551 dark cloud. The eight years of IUE observations confirm the …
ISO observations of the classical nova V1974 Cygni.
Kessler, M. F.; Eyres, S. P. S.; Salama, A. +3 more
We present observations of the classical nova V1974 Cygni (Nova Cyg 1992) obtained with the ISO Short and Long Wavelength Spectrometers (SWS and LWS) and the spectrometer section of ISOPHOT. We identify [NeIII]λ15.5, [NeV]λ14.3, 24.3, [NeVI]λ7.6, [OIII]λ51.8, [OIV]λ25.9. There is evidence that the Ne and O emission arises in physically distinct re…
Searching for coronal plumes in ULYSSES observations of the far solar wind.
Livi, S.; Balogh, A.; Parenti, S. +4 more
In the past, from the analysis of data acquired by the Helios spacecrafts within distances <=1AU, some evidence has been found of the presence of coronal plumes in the solar wind. Ulysses observations offer a unique opportunity to search for plume remnants in the polar wind at larger distances. Pressure balanced structures (PBS), which might po…
First results from the ISOCAM parallel mode.
Altieri, B.; Kessler, M. F.; Prusti, T. +15 more
We present first results of a survey being made in a broad-band 6.75µm filter using the ISOCAM infrared camera in its parallel mode at ~6" resolution. So far we have analysed a sky area of ~1.375deg^2^ down to a limiting flux of 5 mJy and detected a total of 287 objects. The final survey will cover a sky area of ~33deg^2^, most of which will…
Ultraviolet ages of young clusters in the Magellanic Clouds.
Castellani, V.; Cassatella, A.; Brocato, E. +2 more
Following a previous investigation on the integrated UV colours of stellar clusters (Barbero et al. 1990), we study the calibration of the ultraviolet colour index C(15-31) in terms of cluster age, using observations by the International Ultraviolet Explorer of 29 young and populous clusters of the Large Magellanic Cloud (LMC), and of the Small Ma…
The gravitational lens CFRS14.1311 = HST 14176+5226.
Lilly, S. J.; Hammer, F.; Crampton, D. +1 more
Ratnatunga et al. (1995) have recently proposed that an object, HST 14176+5226, in the "Groth-Westphal" HST survey strip is an "Einstein cross" gravitational lens. By chance, this object has been previously observed in the Canada-France Redshift Survey. The candidate lens catalogued as CFRS14.1311, is an elliptical galaxy at z=0.81. In addition, t…
Far infrared mapping of the galaxies M51 and M101 with ISOPHOT.
Lemke, D.; Telesco, C. M.; Kinkel, U. +6 more
We present far infrared (FIR) images of the two nearby galaxies M 51 and M 101 at 60, 100, and at 175mum. These images resolve the spiral arms of the galaxies and a number of giant HII regions embedded therein.
ISOCAM 4µm imaging of the nuclear starburst in M 83.
Rouan, D.; Siebenmorgen, R.; Clavel, J. +6 more
We present ISOCAM images (1.5arcsec resolution), in the Brα line and in the continuum at 4µm, of the starburst nuclear region in the nearby galaxy M 83. The starburst is found to lie: a) along arc joining the 2µm sources at S and SW of the nucleus to the NW 10µm peak, a possible indication of a propagating star formation; b) at t…