What is the importance of stellar X-ray flares to astrophysics, or even more, to the world at large? In the case of the Sun, changes in solar activity at the two temporal extremes can have quite significant consequences. Longterm changes in solar activity, such as the Maunder Minimum, ...
Combining the obtained physical parameters and those in literature for solar and stellar flares, we obtained a good proportional relation between the emitted energies of X-ray and Hα emissions for a flare energy range of 1029--1038 erg. The ratio of the Hα-line to bolometric X-ray emissio...
Optical transient surveys have led to the discovery of dozens of stellar tidal disruption events (TDEs) by massive black hole in the centers of galaxies. Despite extensive searches, X-ray follow-up observations have produced no or only weak X-ray detections in most of them. Here we report th...
H., X-Ray-heated Models of Stellar Flare Atmospheres: Theory and Comparison with Observations: Erratum. Astrophysical Journal Supplement Series, 78, 565, ... S Hawley,G Fisher - 《Astrophysical Journal Supplement》 被引量: 0发表: 1992年 Erratum: "Searching for Planets in the Hyades. IV. Dif...
X-ray observations, we interpret the observed Fe Kα line as being produced by illumination of the photosphere by ionizing coronal X-rays, in which case, for a given Fe photospheric abundance, its intensity depends on the height of the ...
Giant stellar flares can release large amounts of energy within a few days1,2,3,4,5,6,7: X-ray emission alone can be up to ten per cent of the star's bolometric luminosity. These flares exceed the luminosities of the largest solar flares by many orders o
R.-F. Shen, Fast, ultra-luminous X-ray bursts from tidal stripping of white dwarfs by intermediate-mass black holes. ArXiv e-prints (2018) H. Shiokawa, J.H. Krolik, R.M. Cheng, T. Piran, S.C. Noble, General relativistic hydrodynamic simulation of accretion flow from a stellar tid...
"This study gives us new insights into a rarely observed phase of stellar evolution, which is the result of a complex exchange of material that must have happened among the two stars," said Ashley Chrimes, research fellow and X-ray astronomer at the European agency. ...
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We report the XMM-<italic>Newton</italic> observation of a large X-ray flare from the Herbig Ae star V892 Tau. The apparent low mass companion of V892 Tau, V892 Tau NE, is unresolved by XMM-<italic>Newton</italic>. Nevertheless there is compelling evi