High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 – II. Chemodynamics

We present a detailed study of the physical properties of the nebular material in four starforming knots of the blue compact dwarf galaxy Haro 15. Using long-slit and echelle spectroscopy obtained at Las Campanas Observatory, we study the physical conditions (electron density and temperatures), ioni...

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Detalles Bibliográficos
Autores principales:	Hägele, Guillermo Federico, Firpo, Verónica, Bosch, Guillermo Luis, Díaz, Angeles I., Morrell, Nidia Irene
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2012
Materias:	Ciencias Astronómicas ISM: abundances H II regions Galaxies: abundances Galaxies: fundamental parameters Galaxies: individual: Haro 15 Galaxies: starburst
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/126095
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-126095
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Astronómicas ISM: abundances H II regions Galaxies: abundances Galaxies: fundamental parameters Galaxies: individual: Haro 15 Galaxies: starburst
spellingShingle	Ciencias Astronómicas ISM: abundances H II regions Galaxies: abundances Galaxies: fundamental parameters Galaxies: individual: Haro 15 Galaxies: starburst Hägele, Guillermo Federico Firpo, Verónica Bosch, Guillermo Luis Díaz, Angeles I. Morrell, Nidia Irene High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 – II. Chemodynamics
topic_facet	Ciencias Astronómicas ISM: abundances H II regions Galaxies: abundances Galaxies: fundamental parameters Galaxies: individual: Haro 15 Galaxies: starburst
description	We present a detailed study of the physical properties of the nebular material in four starforming knots of the blue compact dwarf galaxy Haro 15. Using long-slit and echelle spectroscopy obtained at Las Campanas Observatory, we study the physical conditions (electron density and temperatures), ionic and total chemical abundances of several atoms, reddening and ionization structure, for the global flux and for the different kinematical components. The latter was derived by comparing the oxygen and sulphur ionic ratios to their corresponding observed emission-line ratios (the η and η 'plots) in different regions of the galaxy. Applying the direct method or empirical relationships for abundance determination, we perform a comparative analysis between these regions. The similarities found in the ionization structure of the different kinematical components imply that the effective temperatures of the ionizing radiation fields are very similar in spite of some small differences in the ionization state of the different elements. Therefore, the different gaseous kinematical components identified in each star-forming knot are probably ionized by the same star cluster. However, the difference in the ionizing structure of the two knots with knot A showing a lower effective temperature than knot B suggests a different evolutionary stage for them consistent with the presence of an older and more evolved stellar population in the first.
format	Articulo Articulo
author	Hägele, Guillermo Federico Firpo, Verónica Bosch, Guillermo Luis Díaz, Angeles I. Morrell, Nidia Irene
author_facet	Hägele, Guillermo Federico Firpo, Verónica Bosch, Guillermo Luis Díaz, Angeles I. Morrell, Nidia Irene
author_sort	Hägele, Guillermo Federico
title	High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 – II. Chemodynamics
title_short	High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 – II. Chemodynamics
title_full	High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 – II. Chemodynamics
title_fullStr	High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 – II. Chemodynamics
title_full_unstemmed	High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 – II. Chemodynamics
title_sort	high-resolution spectroscopy of the blue compact dwarf galaxy haro 15 – ii. chemodynamics
publishDate	2012
url	http://sedici.unlp.edu.ar/handle/10915/126095
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bdutipo_str	Repositorios
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High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 – II. Chemodynamics

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