High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 : I. Internal kinematics

Using echelle spectroscopy, obtained at Las Campanas Observatory, we present a detailed study of the internal kinematics of the nebular material in multiple knots of the blue compact dwarf galaxy Haro15. A detailed analysis of the complex emission-line profiles shows the presence of an underlying br...

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Autores principales: Firpo, Verónica, Bosch, Guillermo Luis, Hägele, Guillermo Federico, Díaz, Ángeles I., Morrell, Nidia Irene
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Astronómicas
Galaxies: individual: Haro15
Galaxies: starburst
Hii regions
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84479
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84479
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
Galaxies: individual: Haro15
Galaxies: starburst
Hii regions
spellingShingle Ciencias Astronómicas
Galaxies: individual: Haro15
Galaxies: starburst
Hii regions
Firpo, Verónica
Bosch, Guillermo Luis
Hägele, Guillermo Federico
Díaz, Ángeles I.
Morrell, Nidia Irene
High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 : I. Internal kinematics
topic_facet Ciencias Astronómicas
Galaxies: individual: Haro15
Galaxies: starburst
Hii regions
description Using echelle spectroscopy, obtained at Las Campanas Observatory, we present a detailed study of the internal kinematics of the nebular material in multiple knots of the blue compact dwarf galaxy Haro15. A detailed analysis of the complex emission-line profiles shows the presence of an underlying broad component in almost all knots, and the brightest star-forming region shows unmistakable signs for the presence of two distinct narrow kinematical components. We also study the information that our analysis provides regarding the motion of the individual knots in the Haro15 galaxy potential, confirming that they follow galactic rotation. Finally, we examine the relation between their velocity dispersion and luminosity, finding that almost all knots follow the relation for virialized systems. This holds for the strong narrow components identified in complex fits and for single profile fits, although the latter show a flatter slope. In agreement with previous findings, in this paper we show that the existence of multiple kinematical components among massive starbursts cannot be overlooked, as it has a noticeable effect on any subsequent analysis that relies on basic parameters.
format Articulo
Articulo
author Firpo, Verónica
Bosch, Guillermo Luis
Hägele, Guillermo Federico
Díaz, Ángeles I.
Morrell, Nidia Irene
author_facet Firpo, Verónica
Bosch, Guillermo Luis
Hägele, Guillermo Federico
Díaz, Ángeles I.
Morrell, Nidia Irene
author_sort Firpo, Verónica
title High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 : I. Internal kinematics
title_short High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 : I. Internal kinematics
title_full High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 : I. Internal kinematics
title_fullStr High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 : I. Internal kinematics
title_full_unstemmed High-resolution spectroscopy of the blue compact dwarf galaxy Haro 15 : I. Internal kinematics
title_sort high-resolution spectroscopy of the blue compact dwarf galaxy haro 15 : i. internal kinematics
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/84479
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