Journal: Astrophysical Journal

  • Publication
    A counterrotating core in the merger remnant candidate NGC 3656 (ARP 155)
    A study is presented of the internal velocity structure of NGC 3656, a galaxy with several morphological signatures of being in an advanced merger stage...
  • Publication
    A high-resolution study of the structure of sunspot light bridges and abnormal granulation
    Strong light bridges (SLBs) represent an abrupt change in the physical conditions of sunspot umbrae. They divide the umbra into separate units (fragments...
  • Publication
    A measurement of the background solar velocity spectrum
    Ten years of continuous measurements of the radial velocity of the Sun have been used to estimate the contribution of various solar surface phenomena to the...
  • Publication
    A remarkable feature in the giant extragalactic H II region NGC 5471
    The discovery of a very high velocity, low-intensity gas feature in the giant extragalactic H II region NGC 5471 is reported. A broad component in the emission...
  • Publication
    A spectroscopic test for substellar objects
    We describe a spectroscopic test capable of providing direct confirmation of the substellar nature of brown dwarf candidates. While the conditions for...
  • Publication
    A stellar disk perpendicular to the radio jet in B2 0034+25
    CCD surface photometry of the radio galaxy B2 0034+25 is reported. Fourier analysis of the intensity variations along a set of closely spaced elliptical...
  • Publication
    Accretion tori and cones of ionizing radiation in Seyfert galaxies
    The photoionization of extended narrow-line regions in Seyfert galaxies by the radiation produced in a thick accretion disk is studied. The emission-line...
  • Publication
    An implicit integral method to solve selected radiative transfer problems. I - Non-LTE line formation
    In this paper we present a new method to solve those radiative transfer problems where the scattering term in the source function, i.e., the frequency...
  • Publication
    An optical fiber system to perform bidimensional spectroscopy
    This article describes a fiber optic system contrived to perform spectral imaging of extended objects. It consists of two fiber bundles mounted simultaneously...