Astrofísicas: Campos magnéticos

  • Publicación
    Understanding internetwork magnetic fields as determined from visible and infrared spectral lines
    We present numerical experiments aimed at understanding why near-infrared observations systematically deliver weak magnetic fields in the internetwork, whereas...
  • Publicación
    Understanding the thermal and magnetic properties of an X-class flare in the low solar atmosphere
    We analyse the spatial distribution and vertical stratification of the physical parameters of the solar atmosphere when an X-class flare occurs. We made use of...
  • Publicación
    Upper chromospheric magnetic field of a sunspot penumbra: observations of fine structure
    Aims: The fine-structure of the magnetic field in a sunspot penumbra in the upper chromosphere is to be explored and compared to that in the photosphere...
  • Publicación
    Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts
    We report on the first joint search for gravitational waves by the TAMA and LIGO collaborations. We looked for millisecond-duration unmodeled gravitational-wave...
  • Publicación
    Upper limits on gravitational wave bursts in LIGO's second science run
    We perform a search for gravitational wave bursts using data from the second science run of the LIGO detectors, using a method based on a wavelet time-frequency...
  • Publicación
    Upper Limits to the Magnetic Field in Central Stars of Planetary Nebulae
    More than about 20 central stars of planetary nebulae (CSPNs) have been observed spectropolarimetrically, yet no clear, unambiguous signal of the presence of a...
  • Publicación
    Variation in sunspot properties between 1999 and 2014
    Aims: We study the variation in the magnetic field strength, area, and continuum intensity of umbrae in solar cycles 23 and 24. Methods: We analyzed a sample of...
  • Publicación
    Vector magnetic field map at the photospheric level below and around a solar filament (neutral line)
    We present a vector magnetic field map obtained on 7 December 2003, below and around a filament located not so far from the active region NOAA 517, whose one...
  • Publicación
    Vector magnetic fields of emerging solar flux. I. Properties at the site of emergence
    Several small emerging bipolar regions have been observed with the Advanced Stokes Polarimeter (ASP), including extensive time series measurements of one small...