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...
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PublicationA New Class of Roche Lobe-filling Hot Subdwarf Binaries
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PublicationA 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...
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PublicationA 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}...
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PublicationAn 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...
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PublicationAnalysis 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...
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NewsAstronomers 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...
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PublicationCatalog 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...
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PublicationDiscovery 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)...
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PublicationGeometry 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...