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46 papers · 1 filter
Tachyon fields with effects of quantum matter in an Anti-de Sitter Universe
Emilio Elizalde, John Quiroga Hurtado
We consider an Anti-de Sitter universe filled by quantum conformal matter with the contribution from the usual tachyon and a perfect fluid. The model represents the combination of…
Carbon burning in intermediate mass primordial stars
P. Gil-Pons, T. Suda, M. Y. Fujimoto +1
The evolution of a zero metallicity 9 M_s star is computed, analyzed and compared with that of a solar metallicity star of identical ZAMS mass. Our computations range from the main…
Discovery of Two Gravitationally Lensed Quasars with Image Separations of 3 Arcseconds from the Sloan Digital Sky Survey
Masamune Oguri, Naohisa Inada, Joseph F. Hennawi +15
We report the discovery of two doubly-imaged quasars, SDSS J100128.61+502756.9 and SDSS J120629.65+433217.6, at redshifts of 1.838 and 1.789 and with image separations of 2.86'' an…
Evolution of the Solar Activity over Time and Effects on Planetary Atmospheres: I. High-energy Irradiances (1-1700 A)
I. Ribas, E. F. Guinan, M. Guedel +1
We report on the results of the Sun in Time multi-wavelength program (X-rays to the UV) of solar analogs with ages covering ~0.1-7 Gyr. The chief science goals are to study the sol…
Nuclear Input for Core-collapse Models
G. Martinez-Pinedo, M. Liebendoerfer, D. Frekers
We review the nuclear physics input necessary for the study of the collapse of massive stars as precursor to supernova explosions. Recent theoretical advances for the calculation o…
Dark Energy and Cosmic Speed-Up from Consistent Modified Gravity
Shin'ichi Nojiri, Sergei D. Odintsov
We review some modified gravity models which describe the gravitational dark energy and the possibility of cosmic speed-up. The new consistent version of such theory which contains…