Journal: The Astrophysical Journal

  • Publication
    On the Triple Nature of the Cataclysmic Variable VY Sculptoris
    The study of the Balmer radial velocity curve of the cataclysmic variable (CV) VY Scl has revealed a new value for the orbital period (0.232 days), which...
  • Publication
    On the Use of Field RR Lyrae as Galactic Probes. I. The Oosterhoff Dichotomy Based on Fundamental Variables
    We collected a large data set of field RR Lyrae stars (RRLs) by using catalogs already available in the literature and Gaia DR2. We estimated the iron...
  • Publication
    On the Use of Field RR Lyrae as Galactic Probes. II. A New ΔS Calibration to Estimate Their Metallicity
    We performed the largest and most homogeneous spectroscopic survey of field RR Lyraes (RRLs). We secured ≍6300 high-resolution (HR, R ∼ 35,000) spectra for 143...
  • Publication
    On the Use of Field RR Lyrae as Galactic Probes. III. The α-element Abundances
    We provide the largest and most homogeneous sample of α-element (Mg, Ca, Ti) and iron abundances for field RR Lyrae (RRLs; 162 variables) by using high...
  • Publication
    On the Use of Field RR Lyrae as Galactic Probes. V. Optical and Radial Velocity Curve Templates
    We collected the largest spectroscopic catalog of RR Lyrae (RRLs) including ≍20,000 high-, medium-, and low-resolution spectra for ≍10,000 RRLs. We provide the...
  • Publication
    On the Use of Field RR Lyrae As Galactic Probes: IV. New Insights Into and Around the Oosterhoff Dichotomy
    We discuss the largest and most homogeneous spectroscopic data set of field RR Lyrae variables (RRLs) available to date. We estimated abundances using both high...
  • Publication
    On the Use of the Index N2 to Derive the Metallicity in Metal-poor Galaxies
    The N2 index ([N II] λ6584/Hα) is used to determine emission line galaxy metallicities at all redshifts, including high redshift, where galaxies tend to be...
  • Publication
    On the Variation of the Peak Asymmetry of Low-l Solar p Modes
    The resonant peaks of solar p modes show small amounts of asymmetry in frequency. Here, we use five independent sets of contemporaneous data, collected over a ~...
  • Publication
    On the White Dwarf Cooling Sequence of the Globular Cluster ω Centauri
    We present deep and precise photometry (F435W, F625W, F658N) of ω Cen collected with the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope...