منابع مشابه
Radio and Infrared Properties of Dust - Enshrouded Wolf - Rayet Stars
This paper discusses our ongoing efforts to characterize dust-enshrouded Wolf-Rayet (WR) stars in the radio and infrared. We have used the Very Large Array to measure the broadband radio spectrum of WR stars in suspected binary systems and discovered non-thermal emission, which is usually attributed to colliding winds. In addition, infrared imaging using aperture masking interferometry on the K...
متن کاملXMM - Newton X - ray Observations of the Wolf - Rayet Binary System WR 147
We present results of a ≈20 ksec X-ray observation of the Wolf-Rayet (WR) binary system WR 147 obtained with XMM-Newton. Previous studies have shown that this system consists of a nitrogen-type WN8 star plus an OB companion whose winds are interacting to produce a colliding wind shock. X-ray spectra from the pn and MOS detectors confirm the high extinction reported from IR studies and reveal ho...
متن کاملMetallicity Dependent Wolf-Rayet Winds
Observational and theoretical evidence in support of metallicity dependent winds for Wolf-Rayet stars is considered. Well known differences in Wolf-Rayet subtype distributions in the Milky Way, LMC and SMC may be attributed to the sensitivity of subtypes to wind density. Implications for Wolf-Rayet stars at low metallicity include a hardening of ionizing flux distributions, an increased WR popu...
متن کاملSearching 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 کاملThe FIR-radio correlation of Wolf-Rayet galaxies and the role of star formation in LINERs
We find that a preliminary classification of LINERs’ energetics may be made in terms of the FIR-radio correlation of Wolf-Rayet galaxies. The AGNor starburst-supported LINERs can be distinguished by their FIR-to-radio ratio, Q ≡ L(1.4GHz)/ L(60μm) > or < 0.01. It is interesting to note that almost all the LINERs with inner rings might be starburstsupported, indicating reduced AGN activities com...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1995
ISSN: 0074-1809
DOI: 10.1017/s0074180900202659