New determination of the absolute proper motion of the variable star U Aqr

A new value for the absolute proper motion of the R CrB type variable star U Aqr has been derived on the basis of meridian and (mainly) photographic positions from various sources. The only previous determination was obtained in 1921, and leads to an exceedingly large space motion when combined with...

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Detalles Bibliográficos
Autor principal: Torres, G.
Formato: Articulo Comunicacion
Lenguaje:Español
Publicado: 1987
Materias:
Astronomía
Galaxias
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/137802
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-137802
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Astronomía
Galaxias
spellingShingle Astronomía
Galaxias
Torres, G.
New determination of the absolute proper motion of the variable star U Aqr
topic_facet Astronomía
Galaxias
description A new value for the absolute proper motion of the R CrB type variable star U Aqr has been derived on the basis of meridian and (mainly) photographic positions from various sources. The only previous determination was obtained in 1921, and leads to an exceedingly large space motion when combined with the rather high radial velocity of the star and any reasonable value for its luminosity, thus casting some doubt upon its reality. The new determination is based on a time interval of over 77 years (as compared to 12 years for the previous value), and aside from the improved precision it gives a quite smaller amount for the space velocity which may be considered to be reasonable for a halo object. The complete version of this work will be published elsewhere.
format Articulo
Comunicacion
author Torres, G.
author_facet Torres, G.
author_sort Torres, G.
title New determination of the absolute proper motion of the variable star U Aqr
title_short New determination of the absolute proper motion of the variable star U Aqr
title_full New determination of the absolute proper motion of the variable star U Aqr
title_fullStr New determination of the absolute proper motion of the variable star U Aqr
title_full_unstemmed New determination of the absolute proper motion of the variable star U Aqr
title_sort new determination of the absolute proper motion of the variable star u aqr
publishDate 1987
url http://sedici.unlp.edu.ar/handle/10915/137802
work_keys_str_mv AT torresg newdeterminationoftheabsolutepropermotionofthevariablestaruaqr
bdutipo_str Repositorios
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