• 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 ...
    • J-PLUS : the Javalambre Photometric Local Universe Survey 

      Cenarro, Andres Javier; Bonatto, Charles Jose; Chies-Santos, Ana Leonor; Vilchez, Jose M. (2019) [Artigo de periódico]
      The Javalambre Photometric Local Universe Survey (J-PLUS ) is an ongoing 12-band photometric optical survey, observing thousands of square degrees of the Northern Hemisphere from the dedicated JAST/T80 telescope at the ...
    • Optical and mid-infrared neon abundance determinations in star-forming regions 

      Dors Júnior, Oli Luiz; Hägelle, Guillermo Federico; Cardaci, Mónica V.; Pérez-Montero, Enrique; Krabbe, Angela Cristina; Vilchez, Jose M.; Sales, Dinalva Aires de; Riffel, Rogério; Riffel, Rogemar André (2013) [Artigo de periódico]
      We have used observational spectroscopic data of star-forming regions compiled from the literature and photoionization models to analyse the neon ionic abundances obtained using both optical and mid-infrared emission lines. ...