357 citations · 994 across the 8 of their papers we have counts for
8 papers
Asteroseismic test of rotational mixing in low-mass white dwarfs
A. G. Istrate, G. Fontaine, A. Gianninas +4
We exploit the recent discovery of pulsations in mixed-atmosphere (He/H), extremely low-mass white dwarf precursors (ELM proto-WDs) to test the proposition that rotational mixing i…
Constraints on the Initial-Final Mass Relation from Wide Double White Dwarfs
Jeff J. Andrews, Marcel A. Agüeros, A. Gianninas +3
We present observational constraints on the initial-final mass relation (IFMR) using wide double white dwarfs (DWDs). We identify 65 new candidate wide DWDs within the Sloan Digita…
3D Model Atmospheres for Extremely Low-Mass White Dwarfs
P. -E. Tremblay, A. Gianninas, M. Kilic +4
We present an extended grid of mean three-dimensional (3D) spectra for low-mass, pure-hydrogen atmosphere DA white dwarfs (WDs). We use CO5BOLD radiation-hydrodynamics 3D simulatio…
High-speed Photometric Observations of ZZ Ceti White Dwarf Candidates
E. M. Green, M. -M. Limoges, A. Gianninas +12
We present high-speed photometric observations of ZZ Ceti white dwarf candidates drawn from the spectroscopic survey of bright DA stars from the Villanova White Dwarf Catalog by Gi…
Flux calibration of medium-resolution spectra from 300 nm to 2500 nm: Model reference spectra and telluric correction
S. Moehler, A. Modigliani, W. Freudling +8
While the near-infrared wavelength regime is becoming more and more important for astrophysics there is a marked lack of spectrophotometric standard star data that would allow the…
Hubble Space Telescope Imaging of the Binary Nucleus of the Planetary Nebula EGB 6
James Liebert, Howard E. Bond, P. Dufour +4
EGB 6 is an ancient, low-surface-brightness planetary nebula. The central star, also cataloged as PG 0950+139, is a very hot DAOZ white dwarf (WD) with an apparent M dwarf companio…
A Spectroscopic Survey & Analysis of Bright, Hydrogen-Rich White Dwarfs
Alexandros Gianninas, Pierre Bergeron, Maria Teresa Ruiz
We have conducted a spectroscopic survey of over 1300 bright (V < 17.5), hydrogen-rich white dwarfs based largely on the last published version of the McCook & Sion catalog. The co…
A Comprehensive Spectroscopic Analysis of DB White Dwarfs
P. Bergeron, F. Wesemael, Pierre Dufour +9
We present a detailed analysis of 108 helium-line (DB) white dwarfs based on model atmosphere fits to high signal-to-noise optical spectroscopy. We derive a mean mass of 0.67 Mo fo…