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25 papers · 1 filter
Optimal filter systems for photometric redshift estimation
N. Benitez, M. Moles, J. A. L. Aguerri +18
In the next years, several cosmological surveys will rely on imaging data to estimate the redshift of galaxies, using traditional filter systems with 4-5 optical broad bands; narro…
Axions and the white dwarf luminosity function
J. Isern, S. Catalan, E. Garcia-Berro +1
The evolution of white dwarfs can be described as a simple cooling process. Recently, it has been possible to determine with an unprecedented precision their luminosity function, t…
On the origin of white dwarfs with carbon-dominated atmospheres: the case of H1504+65
L. G. Althaus, A. H. Córsico, S. Torres +1
We explore different evolutionary scenarios to explain the helium deficiency observed in H1504+65, the most massive known PG1159 star. We concentrate mainly on the possibility that…
MAGIC upper limits to the VHE gamma-ray flux of 3C454.3 in high emission state
H. Anderhub, S. Vercellone, I. Donnarumma +2
We report upper limits to the very high energy flux (E>100 GeV) of the flat spectrum radio quasar 3C454.3 (z=0.859) derived by the Cherenkov telescope MAGIC during the high states…
The Impact of Uncertainties in Reaction Q-values on Nucleosynthesis in Type I X-Ray Bursts
A. Parikh, J. Jose, C. Iliadis +2
Nucleosynthesis in Type I X-ray bursts may involve up to several thousand nuclear processes. The majority of these processes have only been determined theoretically due to the lack…
Axisymmetric smoothed particle hydrodynamics with self-gravity
D. Garcia-Senz, A. Relano, R. M. Cabezon +1
The axisymmetric form of the hydrodynamic equations within the smoothed particle hydrodynamics (SPH) formalism is presented and checked using idealized scenarios taken from astroph…