74 citations · 155 across the 18 of their papers we have counts for
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The evolutionary history of ultra-compact accreting binaries. II. HST spectroscopy of two eclipsing AM CVn stars
W. Yu, A. F. Pala, T. Kupfer +50
AM CVn stars are ultra-compact binaries in which a white dwarf (WD) accretes helium-rich material from a hydrogen-deficient donor. They are promising mHz gravitational-wave sources…
A systematic survey for hypervelocity runaways from thermonuclear supernovae
Kareem El-Badry, Klaus Werner, Ken J. Shen +16
The explosion of a white dwarf (WD) in a close binary can launch a surviving runaway star at velocities of . Such runaways provide a direct probe of…
No Period Change in Two Long-Period AM CVn Binaries
Matthew J. Green, Thomas R. Marsh, Jan van Roestel +25
Ultracompact binary systems, consisting of two compact objects in an orbit , should exhibit measurable rates of orbital period change () due t…
Thermal Evolution of the Central Star in Pa 30
Anthony L. Piro, Yossef Zenati, Tin Long Sunny Wong
Pa 30 has been identified as the nebular remnant of the historical SN 1181. It is host to a hot () central star (WD J005311) with a fast wind ($\approx16,0…
The evolutionary history of ultra-compact accreting binaries. I. Chemical abundances and formation channel of the eclipsing AM CVn system ZTF J225237.05-051917.4 from HST spectroscopy
W. Yu, A. F. Pala, T. Kupfer +33
AM Canum Venaticorum (AM CVn) stars are ultra-compact binary systems composed of a white dwarf (WD) primary accreting from a H-deficient donor. They are important as potential prog…
Mass Loss and Subsequent Thermal Evolution of Surviving Helium White Dwarfs Shocked by Thermonuclear Supernovae
Tin Long Sunny Wong, Lars Bildsten
Following a type Ia supernova (SN Ia) in a double white dwarf (WD) binary, a surviving WD companion leaves at its orbital velocity ,000 - 3,000 km/s. The Gaia mission ha…
Carbon burning cannot explain puffy hypervelocity white dwarfs
Natsuko Yamaguchi, Kareem El-Badry, Tin Long Sunny Wong +1
Several hypervelocity white dwarfs (HVWDs) with space velocities of have recently been discovered. One possible origin of these stars is the dynam…
A Catalogue of Ultracompact Mass-Transferring White Dwarf Binaries
Matthew J. Green, Jan van Roestel, Tin Long Sunny Wong
We present an overview and catalogue of all known mass-transferring binary systems that have white dwarf accretors and orbital periods shorter than 70 minutes, including the AM CVn…
The Temperature versus Orbital Period relation of AM CVns: Insights from their Donors
Colin W. Macrie, Liliana Rivera Sandoval, Yuri Cavecchi +2
We studied the spectral energy distribution (SED) of 22 known AM~CVns with orbital periods () larger than 35~min using multiwavelength public photometric data to estimate…
A gravitational wave detectable candidate Type Ia supernova progenitor
Emma T. Chickles, Kevin B. Burdge, Joheen Chakraborty +37
Type Ia supernovae, critical for studying cosmic expansion, arise from thermonuclear explosions of white dwarfs, but their precise progenitor pathways remain unclear. Growing evide…
Shocking and Mass Loss of Compact Donor Stars in Type Ia Supernovae
Tin Long Sunny Wong, Christopher White, Lars Bildsten
Type Ia supernovae arise from thermonuclear explosions of white dwarfs accreting from a binary companion. Following the explosion, the surviving donor star leaves at roughly its or…
The Asteroseismological Richness of RCB and dLHdC Stars
Tin Long Sunny Wong, Lars Bildsten
RCB stars are solar-mass objects that can exhibit large periods of extinction from dust ejection episodes. Many exhibit semiregular pulsations in the rang…
Dynamical He Flashes in Double White Dwarf Binaries
Tin Long Sunny Wong, Lars Bildsten
The detonation of an overlying helium layer on a carbon-oxygen (CO) white dwarf (WD) can detonate the CO WD and create a thermonuclear supernova (SN).…
Pre-Explosion Properties of Helium Star Donors to Thermonuclear Supernovae
Tin Long Sunny Wong, Josiah Schwab, Ylva Götberg
Helium star - carbon-oxygen white dwarf (CO WD) binaries are potential single-degenerate progenitor systems of thermonuclear supernovae. Revisiting a set of binary evolution calcul…
Improved Dynamical Masses for Six Brown Dwarf Companions Using Hipparcos and Gaia EDR3
G. Mirek Brandt, Trent J. Dupuy, Yiting Li +8
We present comprehensive orbital analyses and dynamical masses for the substellar companions Gl~229~B, Gl~758~B, HD~13724~B, HD~19467~B, HD~33632~Ab, and HD~72946~B. Our dynamical…
Mass Transfer and Stellar Evolution of the White Dwarfs in AM CVn Binaries
Tin Long Sunny Wong, Lars Bildsten
We calculate the stellar evolution of both white dwarfs (WDs) in AM CVn binaries with orbital periods of minutes. We focus on the cases where the do…
Evolution of Helium Star - White Dwarf Binaries Leading up to Thermonuclear Supernovae
Tin Long Sunny Wong, Josiah Schwab
We perform binary evolution calculations on helium star - carbon-oxygen white dwarf (CO WD) binaries using the stellar evolution code MESA. This single degenerate channel may contr…