Publicaciones

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  • Library of high and mid-resolution spectra in the CA II H & K, Hα, Hβ NA i D1, D2, and He i D3 line regions of F, G, K and M field stars
    In this work we present spectroscopic observations centered in the spectral lines most widely used as optical indicators of chromospheric activity (Hα, Hβ, Ca ii H & K, and He i D3) in a sample of F, G, K and M chromospherically inactive stars. The spectra have been obtained with the aim of providing a library of high and mid-resolution spectra to
    Montes, D. et al.

    Fecha de publicación:

    6
    1997
    Número de citas
    52
  • Accretion and UV Variability in BP Tauri
    BP Tau is one of the few classical T Tauri stars for which the presence of a hot spot in the surface has been reported without ambiguity. The most likely source of heating is gravitational energy released by the accreting material as it shocks with the stellar surface. This energy is expected to be radiated mainly at UV wavelengths. In this work we
    Gomez de Castro, Ana I. et al.

    Fecha de publicación:

    6
    1997
    Número de citas
    25
  • Very energy observations of PSR B1951+32
    PSR B1951+32 is a γ-ray pulsar detected by the Energetic Gamma Ray Experiment Telescope (EGRET) and identified with the 39.5 ms radio pulsar in the supernova remnant CTB 80. The EGRET data shows no evidence for a spectral turnover. Here we report on the first observations of PSR B1951+32 beyond 30 GeV. The observations were carried out with the 10
    Srinivasan, R. et al.

    Fecha de publicación:

    5
    1997
    Número de citas
    0
  • Time Series of Solar Granulation Images. I. Differences between Small and Large Granules in Quiet Regions
    A 90 minute time series of high spatial resolution white-light images of solar granulation, obtained at the Swedish Vacuum Solar Tower (Observatorio del Roque de los Muchachos, La Palma), was analyzed to study how the physical properties of the granules changed with size. The observational material was corrected for global motions and for the
    Hirzberger, J. et al.

    Fecha de publicación:

    5
    1997
    Número de citas
    88
  • The Spin Axis Position of C/1995 O1 (Hale-Bopp)
    Monitoring of the near-nucleus activity of C/1995 O1 (Hale-Bopp) began in Teide Observatory in August 1995. During 1996 the comet was observed on 72 nights between March 26 and November 13. A permanent fan structure was observed towards the north during the whole period of observation. The position angle of the axis of this fan was measured and its
    Licandro, J. et al.

    Fecha de publicación:

    5
    1997
    Número de citas
    15
  • The Old Stellar Population in Dwarf Irregular Galaxies
    Dwarf irregular (dIr) galaxies are frequent targets of young stellar populations research. But less attention has been devoted to their intermediate-age and old stars. For galaxies at moderate distances (more than ~ 10 Mpc) the study of these populations must rely on population sinthesys techniques that provide just crude estimates. For nearby
    Aparicio, A. et al.

    Fecha de publicación:

    5
    1997
    Número de citas
    0