Astrophysical: Galaxies

  • News
    The puzzle of the galaxy with no dark matter
    International research led by the Instituto de Astrofísica de Canarias (IAC) and the University of La Laguna (ULL) has found the first evidence of a massive...
  • News
    The puzzle of the strange galaxy made of 99.99% dark matter is solved
    At present, the formation of galaxies is difficult to understand without the presence of a ubiquitous, but mysterious component, termed dark matter. Astronomers...
  • Publication
    The puzzling interpretation of NIR indices: The case of NaI2.21
    We present a detailed study of the Na I line strength index centred in the K band at 22 100 Å (NaI2.21 hereafter) relying on different samples of early-type...
  • Publication
    The puzzling merging cluster Abell 1914: new insights from the kinematics of member galaxies
    We analyse the dynamical state of Abell 1914, a merging cluster hosting a radio halo, quite unusual for its structure. Our study considers spectroscopic data...
  • Publication
    The quantity of dark matter in early-type galaxies and its relation to the environment
    We study the behaviour of the dynamical and stellar mass inside the effective radius of early-type galaxies (ETGs) as a function of environment considering...
  • Publication
    The quasar fraction in low-frequency-selected complete samples and implications for unified schemes
    Low-frequency radio surveys are ideal for selecting orientation-independent samples of extragalactic sources because the sample members are selected by virtue...
  • Publication
    The quasar MBH-Mhost relation through cosmic time - I. Data set and black hole masses
    We study the relation as a function of cosmic time in a sample of 96 quasars from z = 3 to the present epoch. In this paper, we describe the sample, the data...
  • Publication
    The quasar MBH-Mhost relation through cosmic time - II. Evidence for evolution from z = 3 to the present age
    We study the dependence of the relation on the redshift up to z = 3 for a sample of 96 quasars, the host galaxy luminosities of which are known. Black hole...
  • Publication
    The QUEST RR Lyrae Survey: Confirmation of the Clump at 50 Kiloparsecs and Other Overdensities in the Outer Halo
    We have measured the periods and light curves of 148 RR Lyrae variables from V=13.5 to 19.7 from the first 100 deg2 of the Quasar Equatorial Survey Team RR...