Results 1 to 10 of about 3,187 (119)
NEW X-RAY DETECTIONS OF WNL STARS [PDF]
The Astronomical Journal, 2012 Previous studies have demonstrated that putatively single nitrogen-type Wolf-Rayet stars (WN stars) without known companions are X-ray sources. However, almost all WN star X-ray detections so far have been of earlier WN2 - WN6 spectral subtypes. Later WN7 - WN9 subtypes (also known as WNL stars) have proved more difficult to detect, an important ...
Skinner, Stephen Lee +4 more
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X-Raying the Star Formation History of the Universe [PDF]
The Astrophysical Journal, 2000 The current models of early star and galaxy formation are based upon the hierarchical growth of dark matter halos, within which the baryons condense into stars after cooling down from a hot diffuse phase. The latter is replenished by infall of outer gas into the halo potential wells; this includes a fraction previously expelled and preheated, due to ...
Cavaliere, A., Giacconi, R., Menci, N.
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The Astronomy and Astrophysics Review, 2009 The Astronomy and Astrophysics Review, 17 (3)
Guedel, Manuel, Nazé, Yaël
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X-Ray Bursting Neutron Stars [PDF]
Symposium - International Astronomical Union, 1987 The maximum peak luminosity of the X-ray bursts from a burster is most likely interpreted as the Eddington luminosity of a helium-rich envelope surrounding a neutron star. If this interpretation is true, we can obtain a relation between the mass and the radius of the neutron star in terms of the maximum effective temperature of bursts.
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X-Ray Observations of Be Stars [PDF]
Symposium - International Astronomical Union, 1982 Be star binaries with neutron star companions are shown to constitute a major class of X-ray sources. Some general observational and interpretive techniques of X-ray astronomy are reviewed. Data for 12 Be/X-ray binary systems are summarized. The Be/X-ray binaries are found to be systematically wider systems, with lower-mass primaries, and with ...
Saul Rappaport +1 more
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X-Ray Observations of Symbiotic Stars [PDF]
International Astronomical Union Colloquium, 1981 AbstractObservations are reported of 19 symbiotic stars made with the imaging proportional counter of the Einstein Observatory. Three of the objects (HM Sge, V 1016 Cyg and RR Tel) were detected as soft X-ray sources. All three have shown slow-nova eruptions in the past 40 years.
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Symbiotic stars in X-rays [PDF]
Astronomy & Astrophysics, 2013 Due to space restrictions, the full abstract can be seen in the PDF version.
Luna, Gerardo Juan Manuel +3 more
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The Astrophysical Journal, 1969 Scorpius X-1 X ray star model based on relativistic electron distribution due to magnetic field fluctuations, considering role of Alfven ...
Oscar P. Manley, Stainslaw Olbert
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Catalog of X-Ray Detected Be Stars (XDBS)
Research Notes of the AAS, 2022 Abstract We present a catalog of X-ray Detected Be Stars (XDBS) with 161 Be stars from the Be Star Spectra (BeSS) database having X-ray counterparts in the Chandra Source Catalog v2.0, XMM-Newton 4XMM-DR11 Catalog, or Swift 2SXPS Catalog.
Caden Gobat +4 more
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Neutron Stars as X-ray Sources
Nature, 1964 DURING the rocket flight reported in the preceding communication, Bowyer et al. found two celestial X-ray sources with diameters less than 5°. One was located in the northern part of Scorpius in a region of faint stars but devoid of visible nebulosity and radio objects, while the other was coincident with the Crab Nebula, the well-known source of ...
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