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33 papers · 1 filter
Inductive Lusternik-Schnirelmann category in a model category
J. M. Garcia-Calcines, P. R. Garcia-Diaz
We introduce the notion of inductive category in a model category and prove that it agrees with the Ganea approach given by Doeraene. This notion also coincides with the topologica…
The ACS Survey of Galactic Globular Clusters. I. Overview and Clusters Without Previous HST Photometry
Ata Sarajedini, L. Bedin, B. Chaboyer +10
We present the first results of a large ACS Survey of Galactic globular clusters. This Hubble Space Telescope (HST) Treasury project is designed to obtain photometry with S/N > ~10…
The origin of the reversed granulation in the solar photosphere
M. C. C. Cheung, M. Schuessler, F. Moreno-Insertis
We study the structure and reveal the physical nature of the reversed granulation pattern in the solar photosphere by means of 3-dimensional radiative hydrodynamics simulations. We…
Gemini Spectroscopic Survey of Young Star Clusters in Merging/Interacting Galaxies. I. NGC 3256 Tidal-Tail Clusters
Gelys Trancho, Nate Bastian, Francois Schweizer +1
We present Gemini optical spectroscopy of three young star clusters in the western tidal tail of NGC3256. Compact star clusters (as opposed to dwarf-galaxy candidates) in tidal tai…
Some applications of semi-discrete variational integrators to classical field theories
Manuel de Leon, Juan Carlos Marrero, David Martin de Diego
We develop a semi-discrete version of discrete variational mechanics with applications to numerical integration of classical field theories. The geometric preservation properties a…
The Evershed effect observed with 0.2 arsec angular resolution
J. Sanchez Almeida, I. Marquez, J. A. Bonet +1
We present an analysis of the Evershed effect observed with a resolution of 0.2 arcsec. Using the new Swedish 1-m Solar Telescope and its Littrow spectrograph, we scan a significan…