To date (2020 March 23rd) there are 4141 confirmed exoplanets in 3072 planetary systems, plus 5075 candidate exoplanets that still await to be confirmed (data from https://exoplanets.nasa.gov/). The number of known exoplanets is large enough to allow astronomers to study their global properties such as mass distribution, orbital parameters, planets dimension and composition, and to put them in relation with the» Read more
Palermo Astronomical Observatory “Giuseppe S. Vaiana” is one of the research centres of the National Institute for Astrophysics (INAF). It works together with Palermo University through the Department of Physics and Chemistry.
OAPa’s main characteristic is its specific vocation in the field of space astrophysics. The network of activities also involves several frontier research fields both at the national and international level.
A hidden companion for the cepheid V473 Lyr. The study “X-Ray Observations of the Peculiar Cepheid V473 Lyr Identify A Low-mass Companion” of N. R. Evans (Smithsonian Astrophysical Observatory) recently appeared on AJ AJ
Cepheids are pulsating giant stars, whose luminosity varies periodically. This is an important class of stars for several reasons. For instance, the period of their pulsations is related to their intrinsic luminosity. This makes cepheids a class of astronomical “standard candles”, e.g. sources whose intrinsic luminosity can be estimated, allowing us to estimate their distances by comparing intrinsic and observed» Read more
An aspherical explosion to explain SN 1987 A properties. The study “Matter Mixing in Aspherical Core-collapse Supernovae: Three-dimensional Simulations with Single Star and Binary Merger Progenitor Models for SN 1987A” of M. Ono (Astrophysical Big Bang Laboratory) recently appeared on ApJ
A supernova exploded on 1987 February 23rd in the Large Magellanic Cloud, a satellite galaxy of the Milky Way. Being at a distance of “only” 170000 light years from us, this supernova, named SN 1987 A, is the closest supernova exploded in the modern era, and thus it is a template to understand the physics of supernova explosions and the» Read more
Concorso pubblico, per titoli ed esami, riservato ai soggetti disabili, di un Collaboratore di Amministrazione, VII Livello
“Concorso pubblico, per titoli ed esami, riservato ai soggetti disabili, ai fini del reclutamento, con rapporto di lavoro a tempo indeterminato e regime di impegno» Read more