We report the discovery of trailing grand-design nuclear spiral structure in the spiral galaxy NGC 5248. Two tightly wound red spiral arms, with widths less than 1 arcsec (~ 75 pc), emanate at 1 arcsec outside the quiescent nucleus of the galaxy, and can be followed for 3 arcsec, appearing to end before the radius of the circumnuclear starburst

Hay dos formalismos para el estudio de la evolución de estructuras a gran escala desde un punto de vista analítico: el Lagrangiano y el Euleriano. Los buenos resultados dados por el primero y lo farragoso de la presentación usual del segundo han hecho que este último haya recibido escasa atención. En este trabajo se muestra una presentación más

In this talk the question of what is the upper bound on the lightest supersymmetric Higgs mass, m_h is addressed. This question is relevant since experimental lower bounds on m_h might implement, in the near future, exclusion of supersymmetry. By imposing (perturbative) unification of the gauge couplings at some high scale simgt 10^{17} GeV, we

Not Available

Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan It is reported the results of an observational run carried out with the JKT telescope of 1m at La Palma Observatory, which allowed to obtain the near-IR intermediate resolution spectroscopy of the spectral region at ~8500A, which include the CaII triplet, for an extensive sample of ~500 stars that cover a

Not Available