Search Publications
Detection of far-infrared rotational lines of water vapour toward W Hydrae.
Lutz, D.; de Graauw, T.; Feuchtgruber, H. +5 more
We report the first detection of thermal water vapour emission from a circumstellar outflow. We have observed four far-infrared rotational emission lines of water vapour and one water absorption feature toward the evolved star W Hydrae, using the Short Wavelength Spectrometer (SWS) of the Infrared Space Observatory (ISO). Three of the emission lin…
The interstellar D/H ratio toward G191-B2B from GHRS observations.
Ferlet, R.; Vidal-Madjar, A.; Lallement, R. +3 more
We have observed the DA white dwarf G191-B2B using HST-GHRS to measure the interstellar D/H ratio. In order to derive an accurate structure of the line of sight, we have observed and analysed using a profile fitting procedure the interstellar lines of MgII (2800. and FeII (2344. high resolution using the Echelle B grating, and SiII (1190... (1206.…
High resolution UV spectroscopy of two hot (pre-) white dwarfs with the Hubble Space Telescope. KPD0005+5106 and RXJ2117+3412.
Rauch, T.; Werner, K.; Dreizler, S. +4 more
High resolution UV spectra of KPD0005+5106 and RXJ2117+3412 have been obtained with the Goddard High Resolution Spectrograph aboard the Hubble Space Telescope. The data were subject to a non-LTE model atmosphere analysis. For KPD0005+5106, the hottest known helium-rich white dwarf, the C and N abundances as well as an upper limit for O have been d…
ISOCAM mapping of the Whirlpool galaxy M51.
Elbaz, D.; Boulanger, F.; Okumura, K. +13 more
We have obtained the first images of the 6.75 and 15µm continuum emission in the Whirlpool galaxy with ISOCAM, the infrared camera of the ISO (Kesslet et al., 1996A&A...315L..27K). These data reveal the well-developed, spiral arms of the galaxy, in addition to diffuse emission between arms and in the outer regions of the disk. There is a…
Spectroscopic study of the outflowing disk winds of B[e] supergiants in the Magellanic Clouds.
Stahl, O.; Humphreys, R. M.; Zickgraf, F. -J. +3 more
We report on UV high resolution spectroscopic observations of R50 in the Small Magellanic Cloud, and R82 and HenS22 in the Large Magellanic Cloud obtained with the International Ultraviolet Explorer. The observed stars are supposed to represent edge-on cases of B[e] supergiants for which a two-component stellar wind model has previously been sugge…
Detection of an absorption feature at the position of the 4.27-µm band of solid CO_2_.
Henning, T.; Lemke, D.; Pfau, W. +3 more
We report observations of 13 young infrared sources associated with molecular clouds with ISO's spectrophotometer ISOPHOT-S in the wavelength range from 2.5 to 11.6µm. In addition to a number of well-known interstellar bands due to various molecular ices, a new band at 4.27µm was detected, which is very likely attributed to C=O stretch…
Latitude variations of ~7MeV and >300MeV cosmic ray electron fluxes in the heliosphere: ULYSSES COSPIN/KET results and implications.
Sierks, H.; Kunow, H.; Wibberenz, G. +8 more
The 160° latitude scan performed in less than one year between summer 1994 and summer 1995 by Ulysses allowed us to obtain unique data about the latitudinal dependence of the cosmic ray fluxes. We present in this paper results on the electron component derived from the COSPIN/KET instrument onboard Ulysses, both at MeV and GeV energies. The variat…
R4 in the Small Magellanic Cloud: a spectroscopic binary with a B[e]/LBV-type component.
Stahl, O.; Zickgraf, F. -J.; Wolf, B. +3 more
During the past twelve years we observed several spectra of the B[e] star R4 in the SMC with CASPEC at ESO, La Silla. We also obtained UBV(RI) and JHK photometry during various occasions at La Silla. Further photometry was available in the literature. Brightness variations typical for LBVs of about 0.7mag in V were found. The optical spectra are d…
First detection of the 56-µm rotational line of HD in Saturn's atmosphere.
Ade, P. A. R.; Lellouch, E.; Encrenaz, T. +25 more
The R(1) rotational line of HD at 56.23µm has been detected for the first time on Saturn using the Long Wavelength Spectrometer (LWS) on board the Infrared Space Observatory (ISO). The measurements were made using the LWS in Fabry-Perot mode in January 1996 during the ISO performance verification phase. The measured spectrum has been compare…
LWS observations of the bright rimmed globule IC 1396N.
Ade, P. A. R.; Liseau, R.; White, G. J. +36 more
We present the first far-infrared spectrum of the IRAS source associated with IC 1396N, located in the HII region IC 1396 together with submillimeter and millimeter photometry. A rich spectrum of CO, OH, and H_2_O lines are detected in the ISO-LWS spectrum, indicative of a warm, dense region, probably shock excited, around the source. Among the fi…