Publicaciones

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  • He 2-25, Th 2-B, 19W32: further links between bipolar planetary nebulae and symbiotic stars?
    Optical spectroscopy of the highly collimated bipolar nebulae He 2-25, Th 2-B and 19W32 is presented. He 2-25 and Th 2-B are found to have very dense (N_e~10^7 cm^-3) cores characterized by emission lines of low- to intermediate-ionization species, including rich [FeII] emission. The Hα profiles present broad non-Gaussian wings. These spectral
    Corradi, Romano L. M.

    Fecha de publicación:

    9
    1995
    Número de citas
    63
  • Four-colour photometry of eclipsing binaries. XXXB. The early B-type near-contact binary LZ Centauri.
    LZ Cen is a double-lined, near-contact but detached eclipsing binary consisting of two evolved early B stars (B0.5-B1). This paper presents the first photoelectric and spectroscopic analysis of the system, based on new light curves and spectroscopic data. uvby light curves were obtained with the Danish 50 cm telescope at ESO, La Silla (916 points
    Rabello Soares, M. C. A. et al.

    Fecha de publicación:

    9
    1995
    Número de citas
    28
  • Effects of a dependence of meteor brightness on the entry angle.
    In this paper we discuss the observational consequences of a dependence of meteor brightness on the entry angle z_R_, namely the decrease of the observed rates of meteors and the reduction of the population indices r for radiant zenith distances larger than zero. These effects, if not properly accounted for, lead to erroneous values of meteor
    Bellot Rubio, L. R.

    Fecha de publicación:

    9
    1995
    Número de citas
    19
  • Discovery of a brown dwarf in the Pleiades star cluster
    BROWN dwarfs are cool star-like objects that have insufficient mass to maintain stable nuclear fusion in their interiors. Although brown dwarfs are not stars, they are expected to form in the same way, and their frequency of occurrence should reflect the trends seen in the birthrates of low-mass stars. But finding brown dwarfs has proved to be
    Rebolo, R. et al.

    Fecha de publicación:

    9
    1995
    Número de citas
    340
  • Deficit of distant X-ray-emitting galaxy clusters and implications for cluster evolution
    CLUSTERS of galaxies are the largest gravitationally bound systems in the Universe and therefore provide important constraints on the formation and evolution of large-scale structure. Cluster evolution can be inferred from observations of the X-ray emission of the gas in distant clusters, but interpreting these data is not straightforward. In a
    Castander, Francisco J. et al.

    Fecha de publicación:

    9
    1995
    Número de citas
    65
  • The Shape of the Luminosity Profiles of Bulges of Spiral Galaxies
    Using a 2D generalization of Kent's model-independent decomposition method, we extract the K-band light profiles of the bulges of a sample of field galaxies with morphological types ranging from S0 to Sbc. We then examine the shape of the bulge profiles, by means of fitting a seeing-convolved power law of the form μ(r) is proportional to r^1/n^
    Andredakis, Y. C. et al.

    Fecha de publicación:

    8
    1995
    Número de citas
    330