منابع مشابه
Searching for hidden Wolf-Rayet stars in the Galactic Plane – 15 new Wolf-Rayet stars
We report the discovery of fifteen previously unknown Wolf-Rayet (WR) stars found as part of an infrared broad-band study of candidate WR stars in the Galaxy. We have derived an empirically-based selection algorithm which has selected ∼5000 WR candidate stars located within the Galactic Plane drawn from the GLIMPSE (midinfrared) and 2MASS (near-infrared) catalogues. Spectroscopic follow-up of 1...
متن کاملWolf-Rayet stars probed by AMBER/VLTI
Massive stars deeply influence their surroundings by their luminosity and the injection of kinetic energy. So far, they have mostly been studied with spatially unresolved observations, although evidence of geometrical complexity of their wind are numerous. Interferometry can provide spatially resolved observations of massive stars and their immediate vicinity. Specific geometries (disks, jets, ...
متن کاملWolf–rayet Stars and Radioisotope Production
Radioisotopes are natural clocks which can be used to estimate the age of the solar system and of the Universe (see e.g. Takahashi 1998; Chen & Tilton 1976; see also the recent review by Arnould & Takahashi 1999). They are responsible for the steady decline of the light curves of supernovae (see e.g. Diehl & Timmes 1998, and references therein). The diffuse emission at 1.8 MeV from the decay of...
متن کاملWolf-rayet Stars as Imf Probes
Wolf-Rayet stars are the evolved descendents of massive stars. Their extraordinary properties make them useful tracers of the stellar initial mass function (IMF) in a young stellar population. I discuss how the interpretation of spectral diagnostics are complicated by the interplay of stellar, nebular, and dust properties. There is mounting observational evidence for spatial inhomogeneities in ...
متن کاملRevised stellar parameters of Wolf - Rayet stars
We discuss the reliability of the stellar parameters derived from spectroscopic analyses with atmosphere models. We follow the revisions of the stellar parameters of a WN4b star through improvements of the model codes carried out in the last ten years. In order to judge the reliability of the current 'results we have started to analyze binaries for which the mass of the WR star is known and the...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1999
ISSN: 0074-1809
DOI: 10.1017/s0074180900205378