Search Publications
Spatial variation of >40MeV/n nuclei fluxes observed during the ULYSSES rapid latitude scan.
Kunow, H.; Wibberenz, G.; Potgieter, M. S. +7 more
In this paper we present fluxes of galactic cosmic ray nuclei with energies above 40MeV/n observed by the Kiel Electron Telescope on board the Ulysses spacecraft during the fast scan from the South Pole (September 1994) to the North Pole (July 1995). This part of the Ulysses orbit gives us the unique opportunity to investigate spatial modulation o…
ISO-SWS observations of solid state features towards RAFGL 7009S.
Boulanger, F.; Ehrenfreund, P.; Dartois, E. +6 more
We report the detection of various solid state molecular features in the SWS01 spectrum of a protostellar object, RAFGL 7009S. Identified molecules include H_2_O, CO, CO_2_ together with ^13^CO_2_ and CH_4_. Other less firmly identified features are observed that appear in laboratory spectra of UV photolysed ices. We thus confirm the previous dete…
Variation of electron-strahl width in the high-speed solar wind: ULYSSES observations.
McComas, D. J.; Forsyth, R. J.; Phillips, J. L. +2 more
Halo electron velocity distributions have been surveyed during the first full Ulysses southern polar pass from January 1994 through April 1995. The data examined range from approximately 50degS heliolatitude to the maximum poleward extent of the Ulysses orbit, approximately 80degS, and then back through the solar equator to 35degN heliolatitude. D…
The X-ray source in non-magnetic cataclysmic variables.
Beuermann, K.; Verbunt, F.; van Teeseling, A.
We have analysed all available rosat pspc observations of non-magnetic cataclysmic variables. The VY Scl and non-SU UMa systems have harder X-ray spectra than the SU UMa and UX UMa systems. The old nova RR Pic has a very soft X-ray spectrum and might not be an ordinary non-magnetic cataclysmic variable. There appears to be no clear correlation of …
Mid-Infrared Imaging Spectroscopy in Ophiuchus.
Rouan, D.; Perault, M.; Boulanger, F. +13 more
The dust emission spectrum between 5 and 16µm has been measured at the northern edge of the dense cloud in Ophiuchus at a position where the radiation field intensity is estimated to be 10-20 times the mean Solar neighborhood value. The spectrum shows the well known emission bands at 6.2, 7.7, 8.6, 11.3 and 12.7µm. ISO allows to detect…
Infrared absorption of H_2_O toward massive young stars.
van Dishoeck, E. F.; Helmich, F. P.
We present ISO-SWS observations of absorption lines of gas-phase water within its bending vibrational mode at 6µm toward four massive young stars, which cover a range in physical parameters. Hot water with an excitation temperature >200K is detected toward GL 2136 and GL 4176, in addition to GL 2591 discussed by Helmich et al. (1996A&…
Thermal H_2_O emission from the Herbig-Haro flow HH 54.
Liseau, R.; White, G. J.; Church, S. +29 more
The first detection of thermal water emission from a Herbig-Haro object is presented. The observations were performed with the Lws (Long Wavelength Spectrograph) aboard Iso (Infrared Space Observatory). Besides H_2_O, rotational lines of CO are present in the spectrum of HH 54. These high-J CO lines are used to derive the physical model parameters…
First results of ISO-SWS observations of Jupiter.
Beintema, D. A.; Lellouch, E.; Encrenaz, T. +17 more
The spectrum of Jupiter has been recorded between 2.75 and 14.5µm with the grating mode of the Short-Wavelength Spectrometer (SWS) of ISO. The resolving power is 1500. The main preliminary results of this observation are (1) at 3µm, the first spectroscopic signature, probably associated with NH_3_ ice, of the Jovian cloud at 0.5 bar an…
Dust formation in the Cassiopeia A supernova.
Boulanger, F.; Fransson, C.; Ballet, J. +5 more
High angular resolution (6") spectro-imaging observations of Cassiopeia A, the youngest supernova remnant of our galaxy, were performed with ISOCAM, the mid-infrared camera on board of the Infrared Space Observatory (ISO). The remnant was fully mapped with the LW8 filter (10.7-12µm), which probes mainly dust thermal emission. Emission is see…
ISO-SWS spectroscopy of ARP 220: a highly obscured starburst galaxy.
Lutz, D.; Genzel, R.; Sturm, E. +8 more
We report the first 2.4-45µm spectroscopic study of Arp 220 obtained with the Short Wavelength Spectrometer onboard ISO. Observations of mid infrared lines penetrate deep into the highly obscured regions where the luminosity originates and give direct clues to their sources of excitation. From the observed Brackett line ratios and from the […