High-velocity blueshifted Fe II absorption in the dwarf star-forming galaxy PHL 293B: evidence for a wind driven supershell?

X-shooter and WHT-ISIS spectra of the star-forming galaxy PHL 293B also known as A2228- 00 and SDSS J223036.79-000636.9 are presented in this paper. We find broad (FWHM = 1000 km s-1) and very broad (FWZI = 4000 km s-1) components in the Balmer lines, narrow absorption components in the Balmer serie...

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Detalles Bibliográficos
Autores principales: Terlevich, Roberto, Terlevich, Elena, Bosch, Guillermo Luis, Díaz, Angeles, Hägele, Guillermo Federico, Cardaci, Mónica Viviana, Firpo, Verónica
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ciencias Astronómicas
Galaxies: abundances
Galaxies: dwarf
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85293
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85293
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: abundances
Galaxies: dwarf
spellingShingle Ciencias Astronómicas
Galaxies: abundances
Galaxies: dwarf
Terlevich, Roberto
Terlevich, Elena
Bosch, Guillermo Luis
Díaz, Angeles
Hägele, Guillermo Federico
Cardaci, Mónica Viviana
Firpo, Verónica
High-velocity blueshifted Fe II absorption in the dwarf star-forming galaxy PHL 293B: evidence for a wind driven supershell?
topic_facet Ciencias Astronómicas
Galaxies: abundances
Galaxies: dwarf
description X-shooter and WHT-ISIS spectra of the star-forming galaxy PHL 293B also known as A2228- 00 and SDSS J223036.79-000636.9 are presented in this paper. We find broad (FWHM = 1000 km s-1) and very broad (FWZI = 4000 km s-1) components in the Balmer lines, narrow absorption components in the Balmer series blueshifted by 800 km s-1, previously undetected Fe II multiplet (42) absorptions also blueshifted by 800 km s-1, IR CaII triplet stellar absorptions consistent with [Fe/H] < -2.0 and no broad components or blueshifted absorptions in the He I lines. Based on historical records, we found no optical variability at the 5s level of 0.02 mag between 2005 and 2013 and no optical variability at the level of 0.1 mag for the past 24 yr. The lack of variability rules out transient phenomena like luminous blue variables or Type IIn supernovae as the origin of the blueshifted absorptions of HI and Fe II. The evidence points to either a young and dense expanding supershell or a stationary cooling wind, in both cases driven by the young cluster wind.
format Articulo
Articulo
author Terlevich, Roberto
Terlevich, Elena
Bosch, Guillermo Luis
Díaz, Angeles
Hägele, Guillermo Federico
Cardaci, Mónica Viviana
Firpo, Verónica
author_facet Terlevich, Roberto
Terlevich, Elena
Bosch, Guillermo Luis
Díaz, Angeles
Hägele, Guillermo Federico
Cardaci, Mónica Viviana
Firpo, Verónica
author_sort Terlevich, Roberto
title High-velocity blueshifted Fe II absorption in the dwarf star-forming galaxy PHL 293B: evidence for a wind driven supershell?
title_short High-velocity blueshifted Fe II absorption in the dwarf star-forming galaxy PHL 293B: evidence for a wind driven supershell?
title_full High-velocity blueshifted Fe II absorption in the dwarf star-forming galaxy PHL 293B: evidence for a wind driven supershell?
title_fullStr High-velocity blueshifted Fe II absorption in the dwarf star-forming galaxy PHL 293B: evidence for a wind driven supershell?
title_full_unstemmed High-velocity blueshifted Fe II absorption in the dwarf star-forming galaxy PHL 293B: evidence for a wind driven supershell?
title_sort high-velocity blueshifted fe ii absorption in the dwarf star-forming galaxy phl 293b: evidence for a wind driven supershell?
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/85293
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