Temporal evolution of the spectrum of Supernova 1987A

A preliminary analysis of the changes in the spectrum of SN 1987A is carried out by means of material collected in the Estación Astrofísica de Bosque Alegre since March 1987. In this first approach to the problem we have used spectra on 103 a-D plates with a dispersion of 123 Å/mm, covering the spec...

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Detalles Bibliográficos
Autores principales: Milone, A.A., Milone, L.A.
Formato: Articulo Comunicacion
Lenguaje:Español
Publicado: 1987
Materias:
Astronomía
Galaxia
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/141680
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-141680
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Astronomía
Galaxia
spellingShingle Astronomía
Galaxia
Milone, A.A.
Milone, L.A.
Temporal evolution of the spectrum of Supernova 1987A
topic_facet Astronomía
Galaxia
description A preliminary analysis of the changes in the spectrum of SN 1987A is carried out by means of material collected in the Estación Astrofísica de Bosque Alegre since March 1987. In this first approach to the problem we have used spectra on 103 a-D plates with a dispersion of 123 Å/mm, covering the spectral region between 3800 Å and 6000 Å. The plate resolution is about 2.5 Å. Balmer lines (typical of type II supernovae) are readily identified in SN 1987A and most of the spectral lines show P-Cygni profiles. The changes in the spectrum -such as variations in relative intensity of future shifts- can be easily seen and must be related to changes in the physical conditions of the star's envelope. A remarkable case is that of Hβ line which, moved about 150 Å and 200 Å (absorption and emission, respectively) towards shorter wavelengths by the end of March in about one week's time: this could indicate that the gases ejected became optically thick. The radial velocities determined for different lines are continuously decreasing in absolute value since the outburst, on February. This paper will be published in full length elsewhere.
format Articulo
Comunicacion
author Milone, A.A.
Milone, L.A.
author_facet Milone, A.A.
Milone, L.A.
author_sort Milone, A.A.
title Temporal evolution of the spectrum of Supernova 1987A
title_short Temporal evolution of the spectrum of Supernova 1987A
title_full Temporal evolution of the spectrum of Supernova 1987A
title_fullStr Temporal evolution of the spectrum of Supernova 1987A
title_full_unstemmed Temporal evolution of the spectrum of Supernova 1987A
title_sort temporal evolution of the spectrum of supernova 1987a
publishDate 1987
url http://sedici.unlp.edu.ar/handle/10915/141680
work_keys_str_mv AT miloneaa temporalevolutionofthespectrumofsupernova1987a
AT milonela temporalevolutionofthespectrumofsupernova1987a
bdutipo_str Repositorios
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