Astrofísicas: Astronomía ultravioleta

  • Publicación
    Catalog of Planetary Nebulae Detected by GALEX and Corollary Optical Surveys

    Planetary nebulae (PNs) consist of an ionized envelope surrounding a hot central star (CSPN) that emits mostly at ultraviolet (UV) wavelengths. UV observations...

  • Publicación
    Internal reddening of H II-regions and HH-objects, with special reference to NGC 896 (W3)

    The effect of scattering by dust internal to H II regions on their spectral characteristics has been studied on the basis of simple analytical models, for...

  • Publicación
    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...

  • Publicación
    Observed and computed UV spectral distribution of A and F stars

    An automatic and fast procedure was implemented to determine Te and log g from the comparison of the UV S 2/68 spectra with the Kurucz models. The method has...

  • Publicación
    On the search for transition zone lines in late A type stars

    Observations of the 1400-1800 A region in late A type stars are presented, which were obtained using the IUE satellite at low and high resolution. The...

  • Publicación
    SN 2022acko: The First Early Far-ultraviolet Spectra of a Type IIP Supernova

    We present five far- and near-ultraviolet spectra of the Type II plateau supernova, SN 2022acko, obtained 5, 6, 7, 19, and 21 days after explosion, all observed...

  • Publicación
    Steps toward determination of the size and structure of the broad-line region in active galatic nuclei. 8: an intensive HST, IUE, and ground-based study of NGC 5548

    We present the data and initial results from a combined Hubble Space Telescope (HST)/IUE/ground-based spectroscopic monitoring campaign on the Seyfert 1 galaxy...

  • Publicación
    The broad band energy distribution of the misaligned gamma-ray blazar PKS 0521-365

    Simultaneous UV and X-ray observations of the blazar PKS 0521-365 are combined with radio, IR, optical and gamma-ray data taken at different epochs to study the...

  • Publicación
    The cataclysmic variable SS Cygni

    A general panorama of SS Cygni is presented. The paper first describes the CV cataclysmic variables and the current theories which attempt to describe their...