Results 31 to 40 of about 10,274 (118)
From an Intermittent Rotating Star to a Leader [PDF]
Proceedings of the twenty-sixth annual ACM symposium on Principles of distributed computing, 2007 Considering an asynchronous system made up of n processes and where up to t of them can crash, finding the weakest assumptions that such a system has to satisfy for a common leader to be eventually elected is one of the holy grail quests of fault-tolerant asynchronous computing. This paper is a step in such a quest. It has two main contributions. First,
Fernández, Antonio, Raynal, Michel
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Differential rotation in F stars [PDF]
Astronomische Nachrichten, 2007 AbstractDifferential rotation can be detected in single line profiles of stars rotating more rapidly than about v sin i = 10km s‐1 with the Fourier transform technique. This allows to search for differential rotation in large samples to look for correlations between differential rotation and other stellar parameters.
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Rotation Mixing and Variability in a Stars [PDF]
International Astronomical Union Colloquium, 1976 The purpose of this paper is to contribute to answer the question : why among A stars are there variable and “constant” stars? To do this we will first review the observational properties of these stars, then discuss the theoretical models based on the interplay between microscopic diffusion and rotation, and finally discuss the “unsolved” questions !
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Rotation Speed of the First Stars
, 2010 14 pages, 7 figures, accepted for publication in ...
Stacy, Athena +2 more
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Abundances in rapidly rotating a stars [PDF]
International Astronomical Union Colloquium, 1993 AbstractA study is undertaken to determine abundances in rapidly rotating main sequence A stars (v sin i = 100 − 180 km/s) in order to investigate if non-solar abundance patterns found in slow rotators (Lemke 1989, 1990) persist toward higher rotational velocities.
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Vega is a rapidly rotating star
Nature, 2006 Vega, the second brightest star in the northern hemisphere, serves as a primary spectral type standard. While its spectrum is dominated by broad hydrogen lines, the narrower lines of the heavy elements suggested slow to moderate rotation, giving confidence that the ground-based calibration of its visibile spectrum could be safely extrapolated into the ...
Peterson, D. M. +10 more
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Oscillations of rotating neutron stars [PDF]
The Astrophysical Journal, 1991 AbstractWe use a perturbation technique to compute the rotational corrections to the non-radial oscillation spectrum of a realistic neutron-star model. We compute, to first order in the rotation rate, the corrections to the normal mode eigenfrequencies and eigenfunctions.
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Existence of rotating magnetic stars
Physica D: Nonlinear Phenomena, 2019 We consider a star as a compressible fluid subject to gravitational and magnetic forces. This leads to an Euler-Poisson system coupled to a magnetic field, which may be regarded as an MHD model together with gravity. The star executes steadily rotating motion about a fixed axis.
Jang, Juhi +2 more
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STRUCTURE OF UNIFORMLY ROTATING STARS [PDF]
The Astrophysical Journal, 2011 Zero age main sequence models of uniformly rotating stars have been computed for ten masses between 1.625 and 8 M_\odot and 21 rotation rates from zero to nearly critical rotation. The surface shape is used to distinguish rotation rather than the surface equatorial velocity or the rotation rate.
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Physical Review DRotating fermion-boson stars are hypothetical celestial objects that consist of both fermionic and bosonic matter interacting exclusively through gravity. Bosonic fields are believed to arise in certain models of particle physics describing dark matter and could accumulate within neutron stars, modifying some of their properties and gravitational wave ...
Mourelle, Jorge Castelo +3 more
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