Star Formation in HII Galaxies. Properties of the ionized gas

Simple item page
dc.creatorHagele, G. F.
dc.creatorDiaz, A. I.
dc.creatorTerlevich, E.
dc.creatorPerez-Montero, E.
dc.creatorTerlevich, R.
dc.creatorCardaci, M. V.
dc.date2009-01-16
dc.date.accessioned2026-07-07T12:32:03Z
dc.date.available2026-07-07T12:32:03Z
dc.descriptionWe propose a methodology to perform a self-consistent analysis of the physical properties of the emitting gas of HII galaxies adequate to the data that can be obtained with the XXI century technology. This methodology requires the production and calibration of empirical relations between the different line temperatures that should superseed currently used ones based on very simple, and poorly tested, photo-ionization model sequences. Then, these observations are analysed applying a methodology designed to obtain accurate elemental abundances of oxygen, sulphur, nitrogen, neon, argon and iron in the ionsied gas. Four electron temperatures and one electron density are derived from the observed forbidden line ratios using the five-level atom approximation. For our best objects errors of 1% in T([OIII]), 3% in T([OII]) and 5% in T([SIII]) are achieved with a resulting accuracy between 5 and 9% in total oxygen abundances, O/H. These accuracies are expected to improve as better calibrations based on more precise measurements, both on electron temperatures and densities, are produced.
dc.description6 pages, proceedings to "Star-forming Dwarf Galaxies: Ariadne's Thread in the Cosmic Labyrinth", Crete, 2008
dc.identifierhttps://arxiv.org/abs/0901.2465
dc.identifierhttp://arxiv.org/abs/0901.2465
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/216656
dc.subjectAstrophysics of Galaxies
dc.titleStar Formation in HII Galaxies. Properties of the ionized gas
dc.typetext

Files

Collections

arXiv