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51 papers · 1 filter
Jacobi osculating rank and isotropic geodesics on naturally reductive 3-manifolds
J. C. Gonzalez-Davila
We study the Jacobi osculating rank of geodesics on naturally reductive homogeneous manifolds and we apply this theory to the 3-dimensional case. Here, each non-symmetric, simply c…
Metallicity distribution of red giants in the Inner Galaxy from Near Infrared spectra
C. González-Fernández, A. Cabrera-Lavers, P. L. Hammersley +1
In this paper, we present low resolution (R=500) near-infrared spectra for selected and serendipitous sources in six inner in-plane Galactic fields, with the aim of analysing the s…
Harmonicity of sections of sphere bundles
J. C. Gonzalez-Davila, F. Martin Cabrera, M. Salvai
We consider the energy functional on the space of sections of a sphere bundle over a Riemannian manifold (M, <,>) equipped with the Sasaki metric and we discuss the characterising…
Structural properties of disk galaxies I. The intrinsic ellipticity of bulges
J. Mendez-Abreu, J. A. L. Aguerri, E. M. Corsini +1
(Abridged) A variety of formation scenarios was proposed to explain the diversity of properties observed in bulges. Studying their intrinsic shape can help in constraining the domi…
Emission spectra of atoms with non-Markovian interaction: Fluorescence in a photonic crystal
Ines de Vega, Daniel Alonso
We present a formula to evaluate the spontaneous emission spectra of an atom in contact with a radiation field with non-Markovian effects. This formula is written in terms of a two…
Upper limit for gamma-ray emission above 140 GeV from the dwarf spheroidal galaxy Draco
MAGIC Collaboration, J. Albert
The nearby dwarf spheroidal galaxy Draco with its high mass to light ratio is one of the most auspicious targets for indirect dark matter searches. Annihilation of hypothetical DM…