Astrophysical: Galaxies

  • Publication
    Variable stars in local group galaxies - IV. RR Lyrae stars in the central regions of the low-density galaxy Crater II
    We present a search and analysis of variable stars in the recently discovered Crater II dwarf galaxy. Based on B, V, I data collected with the Isaac Newton...
  • Publication
    Variable stars in Local Group galaxies - V. The fast and early evolution of the low-mass Eridanus II dSph galaxy
    We present a detailed study of the variable star population of Eridanus II (Eri II), an ultra-faint dwarf galaxy that lies close to the Milky Way virial radius...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    Variation of Galactic Bar Length with Amplitude and Density as Evidence for Bar Growth over a Hubble Time
    Ks-band images of 20 barred galaxies show an increase in the peak amplitude of the normalized m=2 Fourier component with the R25-normalized radius at this peak...
  • Publication
    Variation of the stellar initial mass function in semi-analytical models. III. Testing the cosmic-ray regulated integrated galaxy-wide initial mass function
    Context. In our previous work, we derived the CR-IGIMF, which is a new scenario for a variable stellar initial mass function (IMF) that combines numerical...
  • Publication
    Velocities in the A2345 cluster (Boschin+, 2010)
    Multi-object spectroscopic observations of A2345 were carried out at the TNG telescope in August 2008. We used DOLORES/MOS with the LR-B Grism 1, yielding a...
  • Publication
    Velocities of A2294 galaxies (Girardi+, 2010)
    Multi-object spectroscopic observations of A2294 were carried out at the TNG telescope in December 2007 and August 2008. (1 data file).