• CCD imaging of NGC 4861 : ionized gas properties and stellar formation 

      Cepa, Jordi; Vilchez, Jose M.; Dottori, Horacio Alberto; Barth, Clarissa Silva (1994) [Artigo de periódico]
      This work undertakes the study of the galaxy NGC 4861, using imaging centered at the strong lines Hα, Hβ, [O III] λ5007 and nearby continua. Integrated, absolute fluxes of 28 H II regions, and the region known as the bright ...
    • Ccd imaging of ngc 4861 : morphology and brightness distribution 

      Dottori, Horacio Alberto; Cepa, Jordi; Vilchez, Jose M.; Barth, Clarissa Silva (1994) [Artigo de periódico]
      We discuss narrow band CCD imaging of NGC 4861 in continua at 4500 Å, 5300 Å and 6300 Å as well as in Hα, Hβ and [OIII] λ 5007Å lines. We find that the system exhibits a double nucleus structure anda counter-tail to the ...