Astrophysical: White dwarf stars

  • Publication
    A New Class of Roche Lobe-filling Hot Subdwarf Binaries
    We present the discovery of the second binary with a Roche lobe-filling hot subdwarf transferring mass to a white dwarf (WD) companion. This 56 minute binary...
  • Publication
    A new pulsating PG 1159 white dwarf - RXJ 2117.1 + 3412
    RXJ 2117.1 + 3412 is a newly spectroscopically identified bright PG1159 star discovered in the ROSAT XRT sky survey. We report the results of rapid photometry...
  • Publication
    A Systematic Search of Zwicky Transient Facility Data for Ultracompact Binary LISA-detectable Gravitational-wave Sources
    Using photometry collected with the Zwicky Transient Facility, we are conducting an ongoing survey for binary systems with short orbital periods ( ${P}_{{\rm{b}...
  • Publication
    An optical time-resolved spectroscopic study of SS Cygni. 1: Quiescence
    In this work we analyze time-resolved spectra of SS Cygni in quiescence. The geometrical and orbital fundamental parameters of the system are determined. When...
  • Publication
    Analysis of Previously Classified White Dwarf-Main-sequence Binaries Using Data from the APOGEE Survey
    We present analyses of near-infrared spectroscopic data from the Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey for 45 previously...
  • News
    Astronomers discover a white dwarf formed by the merger of two stars
    An international team of researchers led by the University of Warwick, with a member who is a scientist at the IAC has discovered white dwarf with unusual...
  • Publication
    Catalog of Planetary Nebulae Detected by GALEX and Corollary Optical Surveys
    Planetary nebulae (PNs) consist of an ionized envelope surrounding a hot central star (CSPN) that emits mostly at ultraviolet (UV) wavelengths. UV observations...
  • Publication
    Discovery of Two Pulsating Extremely Low-mass Pre-white Dwarf Candidates in the TESS Eclipsing Binaries
    We report the discovery of two new pulsating extremely low-mass pre-white dwarf (pre-ELMV) candidates in the Transiting Exoplanet Survey Satellite (TESS)...
  • Publication
    Geometry of the Draco C1 Symbiotic Binary
    Draco C1 is a known symbiotic binary star system composed of a carbon red giant and a hot, compact companion—likely a white dwarf—belonging to the Draco dwarf...