Results 41 to 50 of about 861,847 (264)
On the oscillation spectra of ultra compact stars [PDF]
Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences, 1995 Abstract Quasi-normal modes of ultra compact stars with uniform energy density have been calculated. For less compact stars, there is only one very slowly damped polar mode (corresponding to the Kelvin f-mode) for each spherical harmonic index l.
Kojima, Yasufumi +2 more
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Theory and evidence of global Rossby waves in upper main-sequence stars: r-mode oscillations in many Kepler stars [PDF]
, 2017 Asteroseismic inference from pressure modes (p modes) and buoyancy, or gravity, modes (g modes) is ubiquitous for stars across the Hertzsprung–Russell diagram. Until now, however, discussion of r modes (global Rossby waves) has been rare.
H. Saio +4 more
semanticscholar +1 more source
Solar‐like oscillations in cluster stars [PDF]
Astronomische Nachrichten, 2010 AbstractWe present a brief overview of the history of attempts to obtain a clear detection of solar‐like oscillations in cluster stars, and discuss the results on the first clear detection, which was made by the Kepler Asteroseismic Science Consortium (KASC) Working Group 2 (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Stello, D. +23 more
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Radial oscillations of strange quark stars admixed with condensed dark matter [PDF]
, 2017 We compute the 20 lowest frequency radial oscillation modes of strange stars admixed with condensed dark matter. We assume a self-interacting bosonic dark matter, and we model dark matter inside the star as a Bose-Einstein condensate.
G. Panotopoulos, I. Lopes
semanticscholar +1 more source
Discrimination of Quark Stars from Neutron Stars in Quadrupole Oscillations [PDF]
Progress of Theoretical Physics, 2002 The frequencies and damping times due to gravitational radiation are calculated for self-bound quark star models. The results are compared with those for neutron star models. They are markedly contrasted in less relativistic cases. The distinction derived here from a simple model of quark stars may be relevant to the future theoretical and ...
Kojima, Yasufumi, Sakata, Koh-ichi
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Constraining properties of high-density matter in neutron stars with magneto-elastic oscillations [PDF]
, 2017 We discuss torsional oscillations of highly magnetised neutron stars (magnetars) using two-dimensional, magneto-elastic-hydrodynamical simulations. Our model is able to explain both the low- and high-frequency quasi-periodic oscillations (QPOs) observed ...
M. Gabler +4 more
semanticscholar +1 more source
Radial oscillations of viscous stars
Physical Review DOscillation modes of neutron stars, a key target for third-generation gravitational wave detectors, encode key information about their constituent nuclear matter. In this work, we study the effect of viscosity on oscillations of cold, polytropic, spherically symmetric neutron stars.
Lennox S. Keeble, Jaime Redondo-Yuste
openaire +3 more sources
Constraining black holes with light boson hair and boson stars using epicyclic frequencies and quasiperiodic oscillations [PDF]
, 2016 Light bosonic fields are ubiquitous in extensions of the Standard Model. Even when minimally coupled to gravity, these fields might evade the assumptions of the black-hole no-hair theorems and give rise to spinning black holes which can be drastically ...
Nicola Franchini +6 more
semanticscholar +1 more source
Asteroseismology of Solar-Type Stars with K2: Detection of Oscillations in C1 Data [PDF]
, 2015 We present the first detections by the NASA K2 mission of oscillations in solar-type stars, using short-cadence data collected during K2 Campaign 1 (C1).
W. Chaplin +60 more
semanticscholar +1 more source