Astrofísicas: Galaxias

  • Publicación
    The (galaxy-wide) IMF in giant elliptical galaxies: from top to bottom
    Recent evidence based independently on spectral line strengths and dynamical modelling point towards a non-universal stellar initial mass function (IMF)...
  • Publicación
    The 10-200 MU M spectral energy distribution of the prototype narrow-line X-ray galaxy NGC 7582
    We present the spectral energy distribution (SED) between 10 and 200 mu m obtained for the prototype narrow-line X-ray galaxy NGC 7582 with ISOPHOT, the...
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    The 100 Myr Star Formation History of NGC 5471 from Cluster and Resolved Stellar Photometry
    We show that star formation in the giant H II region NGC 5471 has been ongoing during the past 100 Myr. Using Hubble Space Telescope/Wide-Field Planetary Camera...
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    The 2010 Very High Energy γ-Ray Flare and 10 Years of Multi-wavelength Observations of M 87
    The giant radio galaxy M 87 with its proximity (16 Mpc), famous jet, and very massive black hole ((3 - 6) × 109 M &sun;) provides a unique opportunity to...
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    The 3D kinematics of stellar substructures in the periphery of the Large Magellanic Cloud
    We report the 3D kinematics of 27 Mira-like stars in the northern, eastern, and southern periphery of the Large Magellanic Cloud (LMC), based on Gaia proper...
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    The 65 Day Period in 3C 66A during Bright State
    Historically, 3C 66A has been considered a relative quiescent blazar. For that reason, 3C 66A was selected as a comparison source for OJ 287 in the OJ-94...
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    The 700 ks Chandra Spiderweb Field. I. Evidence for widespread nuclear activity in the protocluster
    Aims: We present an analysis of the 700 ks Chandra ACIS-S observation of the field around the radio galaxy J1140-2629 (the Spiderweb Galaxy) at z = 2.156...
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    The 700 ks Chandra Spiderweb Field. II. Evidence for inverse-Compton and thermal diffuse emission in the Spiderweb galaxy
    Aims: We present the X-ray imaging and spectral analysis of the diffuse emission around the radio galaxy J1140-2629 (the Spiderweb galaxy) at z = 2.16 and of...
  • Publicación
    The Abundance Gradient in NGC 3344
    The steep abundance gradient found by McCall, Shields, and Rybski (1981) in the Sbc galaxy NGC 3344 is confirmed by a measurement of the electron temperature in...