Zobrazeno 1 - 10
of 215
pro vyhledávání: '"Idiart, T. P."'
The goal of this article is to give an overview of the current limitations and epistemological barriers in Science and Scientific Philosophy from a very general point of view. We first list and define the types of knowledge nous, doxa and episteme, a
Externí odkaz:
http://arxiv.org/abs/2312.16229
Publikováno v:
Astronomische Nachcrichten (2023)
We discuss in this work the contradictory position in modern Physics between the existence of a microphysical quantum Reality and macrophysical classical one. After discussing some basic concepts in Philosophy, we revisit the situation of Quantum Mec
Externí odkaz:
http://arxiv.org/abs/2301.07297
Planetary nebulae (PN) are an excellent laboratory to investigate the nucleosynthesis and chemical evolution of intermediate mass stars. In these objects accurate abundances can be obtained for several chemical elements that are manufactured or conta
Externí odkaz:
http://arxiv.org/abs/1012.0242
The determination of ages of central stars of planetary nebulae (CSPN) is a complex problem, and there is presently no single method that can be generally applied. We have developed several methods to estimate the ages of CSPN, based both on the obse
Externí odkaz:
http://arxiv.org/abs/0912.4124
The determination of accurate chemical abundances of planetary nebulae (PN) in different galaxies allows us to obtain important constraints of chemical evolution models for these systems. We have a long term program to derive abundances in the galaxi
Externí odkaz:
http://arxiv.org/abs/0904.2549
Planetary nebulae (PN) are an essential tool in the study of the chemical evolution of the Milky Way and galaxies of the Local Group, particularly the Magellanic Clouds. In this work, we present some recent results on the determination of chemical ab
Externí odkaz:
http://arxiv.org/abs/0808.1872
New calibrations of spectrophotometric indices of elliptical galaxies as functions of spectrophotometric indices are presented, permitting estimates of mean stellar population ages and metallicities. These calibrations are based on evolutionary model
Externí odkaz:
http://arxiv.org/abs/0708.2409
We investigate the chemical evolution of the Small Magellanic Cloud (SMC) based on abundance data of planetary nebulae (PNe). The main goal is to investigate the time evolution of the oxygen abundance in this galaxy by deriving an age-metallicity rel
Externí odkaz:
http://arxiv.org/abs/0706.1967
An analysis is made of the abundances of planetary nebulae (PN) in the Galaxy (MW), the Large Magellanic Cloud (LMC) and the Small Magellanic Cloud (SMC). The data has been gathered by the IAG/USP group in a homogeneous procedure, involving observati
Externí odkaz:
http://arxiv.org/abs/astro-ph/0407301
Publikováno v:
Astron.Astrophys. 398 (2003) 949-958
New colour distributions have been derived from wide field UBVRI frames for 36 northern bright elliptical galaxies and a few lenticulars. The classical linear representations of colours against log r were derived, with some improvements in the accura
Externí odkaz:
http://arxiv.org/abs/astro-ph/0201323