Tipo de publicación: Con árbitro

  • Publicación
    Variable Stars in Local Group Galaxies. III. And VII, NGC 147, and NGC 185: Insight into the Building Blocks of the M31 Halo
    We present the discovery of 1568 RR Lyrae stars in three of the most luminous M31 satellites: And VII (573), NGC 147 (177), and NGC 185 (818). We use their...
  • Publicación
    Variable Stars in Local Group Galaxies. VI. The Isolated Dwarfs VV 124 and KKr 25
    We present the discovery of variable stars in two isolated dwarf galaxies in the outskirts of the Local Group, VV 124 and KKr 25, using observations with the...
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    Variable stars in the Cetus dwarf spheroidal galaxy: population gradients and connections with the star formation history
    We investigate the variable star content of the isolated, Local Group, dwarf spheroidal (dSph) galaxy Cetus. Multi-epoch, wide-field images collected with the...
  • Publicación
    Variable Stars in the Field of the Hydra II Ultra-faint Dwarf Galaxy
    We report the discovery of one RR Lyrae star in the ultra-faint satellite galaxy Hydra II based on time series photometry in the g, r and i bands obtained with...
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    Variable Very High Energy γ-Ray Emission from Markarian 501
    The blazar Mrk 501 was observed at energies above 0.10 TeV with the MAGIC Telescope from 2005 May through July. The high sensitivity of the instrument enabled...
  • Publicación
    Variable Very-High-Energy Gamma-Ray Emission from the Microquasar LS I +61 303
    Microquasars are binary star systems with relativistic radio-emitting jets. They are potential sources of cosmic rays and can be used to elucidate the physics...
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    Variation in sunspot properties between 1999 and 2011 as observed with the Tenerife Infrared Polarimeter
    Aims: We study the variation in the magnetic field strength and the umbral intensity of sunspots during the declining phase of the solar cycle No. 23 and in the...
  • 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
    Variation of coronal line widths on and off the disk
    We present observations of a Mg X 625 Å coronal line, obtained with the CDS instrument on SoHO, extending from the disk part of the coronal hole to ~ 90 000 km...