Giant H II regions in NGC 7479 and NGC 6070

We present new results from our search for giant H II regions in galaxies visible from the Southern hemisphere. In this work we study two galaxies: NGC 7479 and NGC 6070. Using high-resolution spectra, obtained with different instruments at Las Campanas Observatory, we are able to resolve the emissi...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Firpo, Verónica, Bosch, Guillermo Luis, Hägele, Guillermo Federico, Morrell, Nidia Irene
Formato: Articulo
Lenguaje:Inglés
Publicado: 2010
Materias:
Ciencias Astronómicas
Galaxies: individual: NGC 6070
Galaxies: individual: NGC 7479
Galaxies: starburst
H II regions
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82504
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-82504
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: NGC 6070
Galaxies: individual: NGC 7479
Galaxies: starburst
H II regions
spellingShingle Ciencias Astronómicas
Galaxies: individual: NGC 6070
Galaxies: individual: NGC 7479
Galaxies: starburst
H II regions
Firpo, Verónica
Bosch, Guillermo Luis
Hägele, Guillermo Federico
Morrell, Nidia Irene
Giant H II regions in NGC 7479 and NGC 6070
topic_facet Ciencias Astronómicas
Galaxies: individual: NGC 6070
Galaxies: individual: NGC 7479
Galaxies: starburst
H II regions
description We present new results from our search for giant H II regions in galaxies visible from the Southern hemisphere. In this work we study two galaxies: NGC 7479 and NGC 6070. Using high-resolution spectra, obtained with different instruments at Las Campanas Observatory, we are able to resolve the emission-line profile widths and determine the intrinsic velocity dispersion of the ionized gas. We detect profile widths corresponding to supersonic velocity dispersions in the six observed H II regions. We find that all of them show at least two distinct kinematical components: a relatively narrow feature (between 11 and 22 km s-1) and a broader (between 31 and 77 km s-1) component. Two of the regions show a complex narrow profile in all ion lines, which can be further split into two components with different radial velocities. Whereas the wing broadening of the overall profile can be fitted with a low-intensity broad component for almost all profiles, in one region it was better reproduced by two separate shell-like wings. We have analysed the impact that the presence of multiple components has on the location of the H II regions in the log (L)-log (σ) plane. Although the overall distribution confirms the presence of a regression, the precise location of the regions in the plane is strongly dependent on the components derived from the profile fitting.
format Articulo
Articulo
author Firpo, Verónica
Bosch, Guillermo Luis
Hägele, Guillermo Federico
Morrell, Nidia Irene
author_facet Firpo, Verónica
Bosch, Guillermo Luis
Hägele, Guillermo Federico
Morrell, Nidia Irene
author_sort Firpo, Verónica
title Giant H II regions in NGC 7479 and NGC 6070
title_short Giant H II regions in NGC 7479 and NGC 6070
title_full Giant H II regions in NGC 7479 and NGC 6070
title_fullStr Giant H II regions in NGC 7479 and NGC 6070
title_full_unstemmed Giant H II regions in NGC 7479 and NGC 6070
title_sort giant h ii regions in ngc 7479 and ngc 6070
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/82504
work_keys_str_mv AT firpoveronica gianthiiregionsinngc7479andngc6070
AT boschguillermoluis gianthiiregionsinngc7479andngc6070
AT hageleguillermofederico gianthiiregionsinngc7479andngc6070
AT morrellnidiairene gianthiiregionsinngc7479andngc6070
bdutipo_str Repositorios
_version_ 1764820488344829956

Ejemplares similares