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The Red Supergiant IRAS04553-6825 in the LMC

van Loon, Jacco Th.

UV spectrophotometry and UBVJHKL photometry of the symbiotic nova V443 Her

Munari, U.; Kolotilov, E. A.; Popova, A. A. +1 more

The photometric UBVJHKL observations of the symbiotic star V443 Her performed during 1994-1997 and its UV spectrum obtained from IUE in October 1991 are presented. Over the last decade of dense photometric observations, the U light curve can be described by a sinusoid with P = 598 days. At the same time, no periodic variations (with P or P/2) have…

What causes the variations of the peak intensity of CIR accelerated energetic ion fluxes?

Keppler, E.

The variation of the peak intensity of energetic ions accelerated at CIR related shocks in the interplanetary medium as observed by instruments on board of ULYSSES during its pass towards the south polar region and from the north polar region back to its aphelium is discussed. From ULYSSES measurements alone it cannot be decided whether the observ…

Time Series Resampling Methods

Schwartz, Steven J.; Harvey, Christopher C.

ISO Observations of Classical Novae

Kessler, M. F.; Clavel, J.; Metcalfe, L. +8 more

We describe the ISO programme to observe classical novae. The programme includes observations of novae during and shortly after eruption, and old novae. ISO observations of far infrared fine structure lines are providing us with information about physical conditions in nova ejecta which complement and extend knowledge obtained from ground-based ob…

ISO far-IR spectroscopy of the black hole candidate GRS 1915 + 105

Winkler, Christoph; Trams, Norman

referee We have observed the black hole candidate and Galactic superluminal source GRS 1915+105 with ISO LWS and SWS in March 1996 and March 1997 when the source was at fairly low X-ray and radio flux levels. If the source is associated with a dense molecular cloud, then corresponding far-IR continuum and line fluxes should be easily detectable an…

Refining the Fundamental Parameters of the 3 Post-AGB Stars: HR 4049, HD 52961 and HD 133656 Using Improved Model Atmospheres

Parthasarathy, M.; Monier, R.

Globular Clusters, Hipparcos, and the Age of the Galaxy

Reid, Neill

We discuss the impact of the results from the recent Hipparcos astrometric satellite on distance estimates of galactic globular clusters. Recalibrating the clusters not only implies a relatively small change in the distance to the Large Magellanic Cloud, and hence a rescaling of several estimates of the Hubble constant, but also leads to significa…

The nature of dark matter in our Galaxy.

Chabrier, G.; Schaeffer, R.; Mera, D.

The existence within galaxies of unidentified matter whose only action is gravity has been known since nearly two decades. Important information on its location has been obtained in the very last few years, thanks to deep stellar surveys, to the microlensing events detected by the EROS, MACHO and OGLE experiments that trace dark stellar-size objec…

A first HIPPARCOS contribution to the light elements problem

Spite, M.; Crifo, F.; Spite, F.

{The interpretation of the observations of the light elements requires the knowledge of the evolutionary status of the observed stars. The HIPPARCOS accurate parallaxes solve several cases of ambiguous status. For example, it is shown that, since HD 84937 is a subgiant, its (6Li) abundance is compatible with the predictions of the standard models …