Search Publications
First Results from ISO Spectra of Supernova Remnants Heavily Interacting with the ISM
Lutz, D.; Sturm, E.; Oliva, E. +2 more
ISO spectra of the supernova remnant RCW103 are presented. This object is the prototype of a SNR shock heavily interacting with dense ISM (probably a molecular cloud). The spectra are dominated by prominent lines and show very little continuum at λ < 40 µm suggesting that the 12 and 25 µm IRAS emission from these types of remnant could be domin…
Infrared Properties of a Large Ring Around the LBV G79.29+0.46
Landecker, T. L.; Heske, A.; Wendker, H. J. +2 more
G79.29+0.46 seems to be an unique object. Discovered as a nearly perfect ring in the radio continuum all subsequent observations are consistent with the interpretation that it is a large ring nebula (4‧) around an heavily reddened LBV. Our ISOPHOT and LWS observations on board of ISO show that an infrared ring coincides with the radio ring. Line e…
ISO LWS Observations of H2O from R Cas: A Consistent Model For Its Circumstellar Envelope
Omont, A.; Barlow, M. J.; Cox, P. +6 more
We present an ISO LWS 43-197 µm grating spectrum of the oxygen-rich AGB star R Cas. The spectrum is rich of isolated and blended H2O lines. For their identification and in order to determine the physical parameters of the circumstellar envelope, we have constructed a model which treats radiative transfer, chemical exchange and photodissociation re…
The 3.4 Microns Absorption Feature in CRL 618
Tielens, A. G. G. M.; Geballe, T. R.; Chiar, J. +1 more
Evolution of Southern Star-Forming Regions
Thi, W. F.; Burgdorf, M.; van Dishoeck, E. F. +5 more
We present ISO observations of bright, high-mass southern starforming regions with the Short Wavelength Spectrometer (SWS) and Long Wavelength Spectrometer (LWS). The selected targets show a range of pre-main sequence evolutionary phases. Whereas some objects still show interstellar ice features, the most evolved objects are coincident with ultra-…
EUV Spectral Variability and Non-Equilibrium Ionisation in the 'Quiet' Sun
Harrison, R. A.; Lanzafame, A. C.; Brooks, D. H. +2 more
Recent spectroscopic observations by the Solar and Heliospheric Observatory (SOHO) have revealed the dynamic nature of even the 'quiet' Sun. Spectral variability data clearly show that dynamics in the solar upper atmosphere take place on timescales shorter than those of ionisation relaxation. Accuracy in the interpretation of diagnostic spectral d…
The Absolute Magnitude of RR Lyraes: from HIPPARCOS Parallaxes and Proper Motions
Solano, E.
We have used HIPPARCOS proper motions and the method of Statistical Parallax to estimate the absolute magnitude of RR Lyrae stars. In addition, we have used the HIPPARCOS parallax of RR Lyr itself to determine its absolute magnitude. These two results are in excellent agreement with each other and give a zero-point for the RR Lyrae Mv,[…
The ISO-Spectrum of the Young Star HD 100546
Vandenbussche, B.; Waelkens, C.; Malfait, K.
Crystalline Dust Features: A Simple Model
Waters, L. B. F. M.; Bouwman, Jeroen
The Red Supergiant IRAS04553-6825 in the LMC
van Loon, Jacco Th.