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Nuclear astrophysics: nucleosynthesis in the Universe
(CAMBRIDGE UNIV PRESSNEW YORK, 2012)
Nuclear astrophysics is a relatively young science; it is about half a century old. It is a multidisciplinary subject, since it combines nuclear physics with astrophysics and observations in astronomy. It also addresses ...
Long-term solar activity influences on South American rivers
(Elsevier, 2011-02)
River streamflows are excellent climatic indicators since they integrate precipitation over large areas. Here we follow up on our previous study of the influence of solar activity on the flow of the Parana River, in ...
Role of the Hall effect on the magnetorotational instability
(World Scientific, 2010-06)
Within the framework of magnetohydrodynamics, the Hall effect might become nonnegligible either in fully ionized low density plasmas or in cold plasmas with a low ionization fraction . We address the role of the Hall current ...
The antenna DSA 3 and its potential use for Radio Astronomy
(Asociacion Argentina de Astronomia, 2011-10)
The European Space Agency (ESA) will inaugurate its third Deep Space Antenna (DSA 3) by the end of 2012. DSA 3 will be located in Argentina near the city of Malarg"ue in the Mendoza province. While the instrument will ...
Selection of astrophysical/astronomical/solar sites at the Argentina East Andes range taking into account atmospheric components
(Elsevier, 2016-06)
In the present work we analyze sites in the Argentinian high Andes mountains as possible places for astrophysical/astronomical/solar observatories. They are located at: San Antonio de los Cobres (SAC) and El Leoncito/CASLEO ...
Kelvin-Helmholtz versus Hall magneto-shear instability in astrophysical flows
(American Physical Society, 2014-05)
We study the stability of shear flows in a fully ionized plasma. Kelvin-Helmholtz is a well-known macroscopic and ideal shear-driven instability. In sufficiently low-density plasmas, also the microscopic Hall magnetoshear ...
Astrophysical constraints on a light spinless particle coupled to photons
(1996-12-01)
We examine further astrophysical constraints on a light spinless particle coupled only to photons and proposed by Massó and Toldra. We consider constraints coming from measurements of extra galactic background and from ...
Damping effects on parametric decays of Alfvén waves
(2001)
It is shown that damping effects can destabilize regions that are stable under non-dissipative fluid theory. Damping effects on the ion-acoustic modes are simulated by a collisional-like term in the longitudinal component ...
Growth rates of envelope modulations of electromagnetic waves in relativistic temperature electron-positron plasmas, stimulated by weak or finite phonon damping
(1997)
We study the modulational instability of an electron-positron plasma with relativistic temperatures and phonon damping. It is shown that when the phonon damping is O (1) or O (ε), a modulational instability appears even ...
Parametric decay of a circularly polarized electromagnetic wave in an electron-positron magnetized plasma
(1997)
We study the parametric decays of an electromagnetic wave propagating along an external magnetic field in an electron-positron plasma. We include weakly relativistic effects on the particle motions in the wave field, and ...