Results 231 to 240 of about 26,707 (264)

T Tauri Stars: The X-ray Connection

Astrophysics and Space Science, 1998
The launch of ROSAT opened a new era in the study of T Tauri stars. Prompted by the IUE results, the new X-ray data confirms the existence of extremely high levels of activity in these young stars, very likely of magnetic nature. We address a detailed analysis of the star TW Hya in the X-ray spectral range.
V. M. Costa, M. T. V. T. Lago
openaire   +1 more source

X-Ray Variability of Stars

Physica Scripta, 1984
Most stars emit X-rays. The hot X-ray emitting gas is not gravitationally bound to the star, but is magnetically confined in loops. It is generally assumed that rotation in convective stars relates to magnetic field generation. The X-ray intensity correlates with the rotation rate of the star.
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X-Ray Observations of Active Chromosphere Stars

Space Science Reviews, 1985
HD3196 = 13 Cet α, HD30495 = 58 Eri and HD32918 have been detected as new late-type soft X-ray sources. HD32918 is a member of the FK Com class.
D.K. Bedford, K.H. Elliott, C.J. Eyles
openaire   +1 more source

X-ray emission from Be star/X-ray binaries

Space Science Reviews, 1994
Observations of X-ray emission from Be star/X-ray binaries are reviewed. Some optical characteristics of these binaries are also presented. Theoretical aspects pertaining to the X-ray emissions are given.
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The Sun as an X-Ray Star: Overview of the Method

Solar Physics, 1997
We present a method to study the solar-stellar connection, i.e., the close similarity of the physical phenomena occurring on the Sun and on late-type active stars, by taking advantage of Yohkoh/SXT X-ray images. From such images, we first find the distributions of the whole disk differential emission measure, and from them we then synthesize spectra ...
G. PERES, S. ORLANDO, F. REALE, R. ROSNER, H. HUDSON   +4 more
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Cooling of neutron stars and X-ray observations

Space Science Reviews, 1981
Cooling of neutron stars is calculated using an exact stellar evolution code. The full general relativistic version of the stellar structure equations are solved, with the best physical input currently available. For neutron stars with a stiff equation of state, we find that the deviation from the isothermality in the interior is significant and that ...
Ken’ichi Nomoto, Sachiko Tsuruta
openaire   +1 more source

Supersoft X-ray Stars and Supernovae

Scientific American, 1999
Kahabka, P., van den Heuvel, E.P.J., Rappaport, S.   +2 more
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X-Ray Stars and Infrared Excess

Nature, 1970
R F, O'Connell, S D, Verma
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X-Ray Emission From Utracool Stars

Izvestiya vysshikh uchebnykh zavedenii. Radiofizika, 2021
V.V. Zaitsev, A.V. Stepanov
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X-Rays of the Stars

Science News, 1981
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