Search Publications
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…
SWS H_2_ observations in the BD+40 4124 group.
Heras, A. M.; Prusti, T.; van den Ancker, M. E. +10 more
We report the detection of pure rotational lines of H_2_observed in the direction of three young stellar objects in the BD+40 4124 group, with the short-wavelength spectrometer (SWS) on board ISO. The rotational population distributions of all three stars are consistent with a thermal distribution. The derived kinetic temperatures are =~500K for B…
Very small grain emission in NGC 7023.
Walker, H. J.; Lemke, D.; Schulz, B. +10 more
We observed the reflection nebula NGC 7023 at various positions using wide and narrow band photometry centred on the 7.7 and 11.3µm PAH emission features and wide band photometry at 20 and 25µm. No significant variations have been detected over the nebula in the 7.3 and 20µm continuum relative to the total emission in the 6-15&mi…
Type III radio bursts observed by ULYSSES pole to pole, and simultaneously by wind.
Robinson, P. A.; Bougeret, J. -L.; Hoang, S. +2 more
We consider 555 type III bursts observed by Ulysses and/or Wind while Ulysses traversed a large range of longitude and latitude. We find: 1) The percentage of bursts seen by both spacecraft was 59.5%. It was higher, about 80%, when Ulysses was to the south and east of the Sun as seen from Wind. It decreased to about 50% when Ulysses was near the e…
ULYSSES spacecraft observations of radio and plasma waves: 1991-1995.
Balogh, A.; MacDowall, R. J.; Phillips, J. L. +3 more
The radio and plasma wave investigation of the Ulysses spacecraft mission provided nearly continuous observations of wave electric fields (less than 1MHz) and magnetic fields (less than 450 Hz) from spacecraft launch in late 1990 through perihelion in 1995 and beyond. The Ulysses spacecraft reached heliographic latitudes of +/-80deg, providing a u…