Astrofísicas: Supernovas

  • Publicación
    SN 2025coe: A Multiple-peaked Calcium-strong Transient from a White-dwarf Progenitor
    SN 2025coe is a calcium-strong transient located at an extremely large projected offset ∼39.3 kpc from the center of its host, the nearby early-type galaxy NGC...
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    SNhunt151: an explosive event inside a dense cocoon
    SNhunt151 was initially classified as a supernova (SN) impostor (nonterminal outburst of a massive star). It exhibited a slow increase in luminosity, lasting...
  • Publicación
    Spectral evolution of the He-Poor supernovae 1990U in NGC 7479 and 1991A in IC 2973
    We present the spectral evolution, from about one to six months after optical maximum, of two type Ic supernovae, 1990U in NGC 7479 and 1991A in IC 2973 (UGC...
  • Charla
    Stellar black holes at the dawn of the Universe: cosmological implications
    The so called "dark ages" of the universe began about 400.000 years after the Big Bang as matter cooled down and space became filled with neutral hydrogen for...
  • Publicación
    Strong Carbon Features and a Red Early Color in the Underluminous Type Ia SN 2022xkq
    We present optical, infrared, ultraviolet, and radio observations of SN 2022xkq, an underluminous fast-declining Type Ia supernova (SN Ia) in NGC 1784 (D ≈ 31...
  • Charla
    Supergiants with an Interesting Past
    Exciting things may have happened sometimes to the stars we see in the sky today. For example, Betelgeuse, also known as Alpha-Ori, an M-type red supergiant...
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    Supernova 2014J at M82 - II. Direct analysis of a middle-class Type Ia supernova
    We analyse a time series of optical spectra of SN 2014J from almost two weeks prior to maximum to nearly four months after maximum. We perform our analysis...
  • Charla
    Supernova Dust
    Until the advent in the late 1990’s of sensitive submillimetre arrays such as SCUBA, it was generally thought that the main sources for the interstellar dust...
  • Publicación
    Supernovae and Their Expanding Blast Waves during the Early Evolution of Galactic Globular Clusters
    Our arguments deal with the early evolution of Galactic globular clusters and show why only a few of the supernovae (SNe) products were retained within globular...