Astrofísicas: Galaxias

  • Publicación
    Synchrotron emission from the blazar PG 1553+113. An analysis of its flux and polarization variability
    In 2015 July 29-September 1, the satellite XMM-Newton pointed at the BL Lac object PG 1553+133 six times, collecting data for 218 h. During one of these epochs...
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    Synthetic galaxy clusters and observations based on Dark Energy Survey Year 3 Data
    We develop a novel data-driven method for generating synthetic optical observations of galaxy clusters. In cluster weak lensing, the interplay between analysis...
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    Systematic Search for Extremely Metal-poor Galaxies in the Sloan Digital Sky Survey
    We carry out a systematic search for extremely metal-poor (XMP) galaxies in the spectroscopic sample of Sloan Digital Sky Survey (SDSS) data release 7 (DR7)...
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    Systematic Search for VHE Gamma-Ray Emission from X-Ray-bright High-Frequency BL Lac Objects
    All but three (M87, BL Lac, and 3C 279) extragalactic sources detected so far at very high energy γ-rays belong to the class of high-frequency-peaked BL Lac...
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    Systematic variation of the stellar initial mass function with velocity dispersion in early-type galaxies
    An essential component of galaxy formation theory is the stellar initial mass function (IMF) that describes the parent distribution of stellar mass in star...
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    Temperature Bias and the Primordial Helium Abundance Determination
    We study the effect that the temperature structure has on the determination of the primordial helium abundance, Yp. We provide an equation linking T(O III), the...
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    Testing emission models on the extreme blazar 2WHSP J073326.7+515354 detected at very high energies with the MAGIC telescopes
    Extreme high-energy-peaked BL Lac objects (EHBLs) are an emerging class of blazars. Their typical two-hump-structured spectral energy distribution (SED) peaks...
  • Publicación
    Testing Intermediate-Age Stellar Evolution Models with VLT Photometry of Large Magellanic Cloud Clusters. I. The Data
    This is the first of a series of three papers devoted to the calibration of a few parameters of crucial importance in the modeling of the evolution of...
  • Publicación
    Testing Intermediate-Age Stellar Evolution Models with VLT Photometry of Large Magellanic Cloud Clusters. II. Analysis with the Yale Models
    Using Yale stellar evolution models, we present an analysis of the color-magnitude diagrams (CMDs) of three intermediate-age LMC clusters, namely, NGC 2173, SL...