Suspected symbiotic stars

During 1987 we were engaged in a program of observation of planetary nebulae and symbiotic stars. The program included a group of five objects classified as suspected symbiotic stars: CD-3608436, Sa3-43, 1 Th4-4, V3804 Sgr and He2-104. All of then have been observed three times. They all appear in A...

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Detalles Bibliográficos
Autores principales: Moreno, H., Gutiérrez Moreno, A.
Formato: Articulo Comunicacion
Lenguaje:Español
Publicado: 1988
Materias:
Astronomía
Galaxia
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/142261
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-142261
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
Moreno, H.
Gutiérrez Moreno, A.
Suspected symbiotic stars
topic_facet Astronomía
Galaxia
description During 1987 we were engaged in a program of observation of planetary nebulae and symbiotic stars. The program included a group of five objects classified as suspected symbiotic stars: CD-3608436, Sa3-43, 1 Th4-4, V3804 Sgr and He2-104. All of then have been observed three times. They all appear in Allen's Catalogue of symbiotic stars as suspected symbiotic. They all share two characteristics which are typical of symbiotic objects: the Balmer decrement is very steep, and the relative intensity of the [0 III] lines, I(λ4363)/I(λ5007), is larger than could be expected for planetary nebulae. Four of them do not show the typical lines at λ6830 and λ7088. The spectra of these objects are presented and their characteristics are discussed; we also discuss their position in the diagnostic diagrams based on the intensities of the forbidden lines [0 III] λλ 4363 and 5007, presented by one of us (Gutiérrez-Moreno) at the Anniversary Symposium of Cerro Tololo. It is concluded that, according to these diagrams and the general spectral characteristics, all these objets are symbiotic stars; this fact is evident from the spectrum itself for CD-36°8436 and, to a lesser extent, for SA3-43, Th4-4 and V3894 Sgr. He2-104 presents a special case, since the characteristic of its continuum correspond exactly to those of a planetary nebula. Nevertheless, its position in the diagrams previously mentioned and the presence of some forbidden emission lines, typical of symbiotic stars, allow its classification in this last group.
format Articulo
Comunicacion
author Moreno, H.
Gutiérrez Moreno, A.
author_facet Moreno, H.
Gutiérrez Moreno, A.
author_sort Moreno, H.
title Suspected symbiotic stars
title_short Suspected symbiotic stars
title_full Suspected symbiotic stars
title_fullStr Suspected symbiotic stars
title_full_unstemmed Suspected symbiotic stars
title_sort suspected symbiotic stars
publishDate 1988
url http://sedici.unlp.edu.ar/handle/10915/142261
work_keys_str_mv AT morenoh suspectedsymbioticstars
AT gutierrezmorenoa suspectedsymbioticstars
bdutipo_str Repositorios
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