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20 papers · 2 filters
Does the Sun Shine by pp or CNO Fusion Reactions?
John N. Bahcall, M. C. Gonzalez-Garcia, C. Penya-Garay
We show that solar neutrino experiments set an upper limit of 7.8% (7.3% including the recent KamLAND measurements) to the fraction of energy that the Sun produces via the CNO fusi…
Extraction of cluster parameters with future Sunyaev-Zel'dovich observations
Nabila Aghanim, Steen H. Hansen, Sergio Pastor +1
The Sunyaev-Zel'dovich (SZ) effect of galaxy clusters is characterized by three parameters: Compton parameter, electron temperature and cluster peculiar velocity. In the present st…
Aperiodic variability of low-mass X-ray binaries at very low frequencies
P. Reig, I. Papadakis, N. D. Kylafis
We have obtained discrete Fourier power spectra of a sample of persistent low-mass neutron-star X-ray binaries using long-term light curves from the All Sky Monitor on board the Ro…
On the stability of thick accretion disks around black holes
Jose A. Font, Frederic Daigne
Discerning the likelihood of the so-called runaway instability of thick accretion disks orbiting black holes is an important issue for most models of cosmic gamma-ray bursts. To th…
Gravitational waves from newly born, hot neutron stars
Valeria Ferrari, Giovanni Miniutti, Jose' A. Pons
We study the gravitational radiation associated to the non--radial oscillations of newly born, hot neutron stars. The frequencies and damping times of the relevant quasi--normal mo…
Stability analysis of relativistic jets from collapsars and its implications on the short-term variability of gamma-ray bursts
M. -A. Aloy, J. -M. Ibanez, J. -A. Miralles +1
We consider the transverse structure and stability properties of relativistic jets formed in the course of the collapse of a massive progenitor. Our numerical simulations show the…