Astrophysical: Astronomical models

  • Publication
    Non-detection of the 1.67 micron band in HB 5? Implications for PAH-related models
    In this paper we present a high resolution IR spectrum of the planetary nebula Hb5, over the range 1.6-1.75 micron. Our aim is to test the hypothesis invoking...
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    Observational and physical cosmology
    The present volume discusses topics associated with the very early universe, primordial nucleosynthesis, big bang nucleosynthesis and light-element abundances...
  • Publication
    Observations of three BL Lacertae objects - Constraints on inhomogeneous relativistically beamed jet models
    Multifrequency observations are presented of three BL Lac objects, including the first UV measurements of 0912 + 297 and 1219 + 285. An eight day optical flare...
  • Publication
    Observed differences between large and small sunspots
    We confirm recent results about the differences in temperature and magnetic field strength between the umbra of large and small sunspots. Five Stokes I- and V...
  • Publication
    On the evolution of supernova remnants. II - Two-dimensional calculations of explosions inside pre-existing wind-driven bubbles
    Supernova explosions within wind-driven bubbles are studied with 2D hydrodynamical calculations. Two different density distributions for the ejecta are...
  • Publication
    On the temperature and velocity through the photosphere of a sunspot penumbra
    We investigate the structure in depth of a sunspot penumbra by means of the inversion code of the radiative transfer equation proposed by Ruiz Cobo & del Toro...
  • Publication
    Oxygen abundances in F-type stars of the Hyades and the Ursa Major group
    We have derived the oxygen abundances of 50 F-type main-sequence stars, belonging to the Hyades open cluster, the Ursa Major group, and the field, using an NLTE...
  • Publication
    Photometric observations of the warped disks of NGC 4013, NGC 4565 and NGC 6504
    Three spiral galaxies with warped disks have been observed; NGC 4013, NGC 4565, and NGC 6504. There is a clear wavelength dependence in the warp's curve, the...
  • Publication
    Position-dependent infrared spectroscopy of M82 - 100,000 Orion nebulae?
    It is reported that 8-13-micron spectra have been obtained at several positions across the extended emission region of M82. No major differences among the...