SciELO - Scientific Electronic Library Online

vol.45 número1Quantitative Stellar Spectral Classification. IV: Application to the Open Cluster IC 2391 índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados




Links relacionados

  • Não possue artigos similaresSimilares em SciELO


Revista mexicana de astronomía y astrofísica

versão impressa ISSN 0185-1101


DZIB, S.  e  RODRIGUEZ, L. F.. Radio Proper Motions of Wolf-Rayet Stars. Rev. mex. astron. astrofis [online]. 2009, vol.45, n.1, pp.3-12. ISSN 0185-1101.

We present the analysis of observations taken from the Very Large Array archive of six Wolf-Rayet stars with radio emission, with the purpose of determining their proper motions. Typically, these observations cover periods of 10 to 20 years. To verify the method, we included WR 140 in the sample, and found that the proper motions determined by us are a few times more accurate than, and consistent within noise, with those of Hipparcos. The other five WR stars were not studied by Hipparcos and we report their proper motions for the first time. The proper motions for WR 145a = Cyg X-3 are consistent with the source being stationary with respect to its local standard of rest and suggest that the black hole in this binary system formed by direct collapse of a massive star, without expulsion of a supernova remnant.

Palavras-chave : astrometry; radio continuum: stars; techniques: interferometric.

        · resumo em Espanhol     · texto em Inglês     · Inglês ( pdf )


Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons