Spectral classification, HR diagram and distribution of symbiotic stars

45 symbiotic stars observed in the direction of the galactic bulge are classified in spectral type using TiO 6180 Å, 7100 Å and VO λ 6865 Å, absorption feature indices and visual comparation. The effective temperatures obtained are used together with K data from the literature to estimate the bolome...

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Autores principales: Medina Tanco, G.A., Steiner, J.E.
Formato: Articulo Comunicacion
Lenguaje:Español
Publicado: 1994
Materias:
Astronomía
Galaxia
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/154979
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
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spelling I19-R120-10915-1549792023-07-04T20:02:24Z http://sedici.unlp.edu.ar/handle/10915/154979 issn:1669-9521 Spectral classification, HR diagram and distribution of symbiotic stars Medina Tanco, G.A. Steiner, J.E. 1994 2023-07-04T10:29:51Z es Astronomía Galaxia 45 symbiotic stars observed in the direction of the galactic bulge are classified in spectral type using TiO 6180 Å, 7100 Å and VO λ 6865 Å, absorption feature indices and visual comparation. The effective temperatures obtained are used together with K data from the literature to estimate the bolometric luminosity of the giant components, and the corresponding HR Diagram is plotted together with evolutionary tracks for intermediate mass stars. Statistical distances to the known galactic symbiotic stars are also derived from the calibration of the bolometric luminosities of galactic bulge symbiotic giants. The results are used to gain insight on the mass and evolutionary status of both S- and D- type symbiotic giants, as well as their spatial distribution and position in the stellar populations scheme of our galaxy. The importance of the ST-Teff relation is also addressed. Asociación Argentina de Astronomía Articulo Comunicacion http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf
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
Medina Tanco, G.A.
Steiner, J.E.
Spectral classification, HR diagram and distribution of symbiotic stars
topic_facet Astronomía
Galaxia
description 45 symbiotic stars observed in the direction of the galactic bulge are classified in spectral type using TiO 6180 Å, 7100 Å and VO λ 6865 Å, absorption feature indices and visual comparation. The effective temperatures obtained are used together with K data from the literature to estimate the bolometric luminosity of the giant components, and the corresponding HR Diagram is plotted together with evolutionary tracks for intermediate mass stars. Statistical distances to the known galactic symbiotic stars are also derived from the calibration of the bolometric luminosities of galactic bulge symbiotic giants. The results are used to gain insight on the mass and evolutionary status of both S- and D- type symbiotic giants, as well as their spatial distribution and position in the stellar populations scheme of our galaxy. The importance of the ST-Teff relation is also addressed.
format Articulo
Comunicacion
author Medina Tanco, G.A.
Steiner, J.E.
author_facet Medina Tanco, G.A.
Steiner, J.E.
author_sort Medina Tanco, G.A.
title Spectral classification, HR diagram and distribution of symbiotic stars
title_short Spectral classification, HR diagram and distribution of symbiotic stars
title_full Spectral classification, HR diagram and distribution of symbiotic stars
title_fullStr Spectral classification, HR diagram and distribution of symbiotic stars
title_full_unstemmed Spectral classification, HR diagram and distribution of symbiotic stars
title_sort spectral classification, hr diagram and distribution of symbiotic stars
publishDate 1994
url http://sedici.unlp.edu.ar/handle/10915/154979
work_keys_str_mv AT medinatancoga spectralclassificationhrdiagramanddistributionofsymbioticstars
AT steinerje spectralclassificationhrdiagramanddistributionofsymbioticstars
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