9 citations · 37 across the 18 of their papers we have counts for
21 papers
Cell-based theoretical criteria on the onset and stability limit of thermonuclear detonation
Kazuya Iwata, Keiichi Maeda, Ken J. Shen
One of the key unresolved problems in thermonuclear explosions of white dwarfs (WDs), including type Ia supernovae, is the condition for ignition and propagation of thermonuclear f…
From Light to Sound: Spectroscopic Evolution & Sonification of the flaring Nova V612 Scuti
Pragati Acharya, Elias Aydi, Kirill V. Sokolovsky +17
We present photometric and spectroscopic observations of the 2017 Galactic nova V612 Sct, whose optical evolution was marked by multiple unusually large maxima. The eruption includ…
Stream-Driven Ignition of a Realistic Undisturbed Helium Shell on a White Dwarf
Nethra Rajavel, Dean M. Townsley, Ken J. Shen
The dynamically driven double degenerate double detonation (D) model has emerged as a promising progenitor scenario for Type Ia supernovae. In this model, a carbon-oxygen white…
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…
Discovery of a runaway star likely ejected by a Type Iax Supernova
A. Bhat, M. Hollands, M. Dorsch +5
Over the past decade, runaway stars have been identified, believed to originate either as surviving donors of Type Ia supernovae or as partially deflagrated accretors producing Typ…
Drawing the line between explosion and collapse in electron-capture supernovae -- I. Impact of conductive flame speeds and ignition conditions on the explosion mechanism
Alexander Holas, Samuel W. Jones, Friedrich K. Roepke +5
Electron-capture supernovae (ECSNe) are commonly thought to result in a collapse to a neutron star. Recent work has shown that a thermonuclear explosion is also a possible outcome.…
Multiple outflows and delayed ejections revealed by early imaging of novae
Elias Aydi, John D. Monnier, Antoine Mérand +39
Novae are thermonuclear eruptions on accreting white dwarfs in interacting binaries. Although most of the accreted envelope is expelled, the mechanism -- impulsive ejection, multip…
He-star donor pathway for the hypervelocity star D6-2
Abinaya Swaruba Rajamuthukumar, Ruediger Pakmor, Stephen Justham +2
Type Ia supernovae are thermonuclear explosions of white dwarfs, yet the nature of their progenitor systems remains uncertain. Recent discoveries of hypervelocity stars provide uni…
Violent mergers can explain the inflated state of some of the fastest stars in the Galaxy
Aakash Bhat, Rüdiger Pakmor, Ken J. Shen +2
A significant number of hypervelocity stars with velocities between km/s have recently been observed. The only plausible explanation so far is that they have been produ…
Violent mergers revisited: The origin of the fastest stars in the Galaxy
Rüdiger Pakmor, Ken J. Shen, Aakash Bhat +12
Binary systems of two carbon-oxygen white dwarfs are one of the most promising candidates for the progenitor systems of Type Ia supernovae. Violent mergers, where the primary white…
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…
Spectroscopic and kinematic analyses of a warm survivor of a D6 supernova
Mark A. Hollands, Ken. J. Shen, Roberto Raddi +3
SDSSJ163712.21+363155.9 is a candidate hyper-runaway star, first identified from its unusual spectrum in the Sloan Digital Sky Survey, which exhibits oxygen, magnesium, and silicon…
The Evolution of Hypervelocity Supernova Survivors and the Outcomes of Interacting Double White Dwarf Binaries
Ken J. Shen
The recent prediction and discovery of hypervelocity supernova survivors has provided strong evidence that the "dynamically driven double-degenerate double-detonation" (D6) Type Ia…
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…
Non-LTE Synthetic Observables of a Multidimensional Model of Type Ia Supernovae
Samuel J. Boos, Luc Dessart, Ken J. Shen +1
Many promising explosion models for the elusive origin of Type Ia supernovae (SNe Ia) ultimately fail to completely reproduce a number of observed properties of these events. One l…
Ultraviolet spectroscopy of the supernova Ia hypervelocity runaway white dwarf J0927-6335
Klaus Werner, Kareem El-Badry, Boris T. Gänsicke +1
The hot white dwarf (WD) J0927-6335 (Gaia DR3 5250394728194220800, effective temperature T = 60,000 K, surface gravity log g = 7) was detected as the fastest known Gala…
Local two-dimensional simulations of the ignition of a helium shell detonation on a white dwarf by an impacting stream
Nethra Rajavel, Dean M. Townsley, Ken J. Shen
The double detonation model is one of the prevalent explosion mechanisms of Type Ia Supernovae (SNe Ia) wherein an outer helium shell detonation triggers a core detonation in the w…
Supernova Shocks Cannot Explain the Inflated State of Hypervelocity Runaways from White Dwarf Binaries
Aakash Bhat, Evan B. Bauer, Rüdiger Pakmor +5
Recent observations have found a growing number of hypervelocity stars with speeds of km\,s which could have only been produced through thermonuclear su…
Almost All Carbon/Oxygen White Dwarfs Can Host Double Detonations
Ken J. Shen, Samuel J. Boos, Dean M. Townsley
Double detonations of sub-Chandrasekhar-mass white dwarfs (WDs) in unstably mass-transferring double WD binaries have become one of the leading contenders to explain most Type Ia s…
Type Ia Supernovae Can Arise from the Detonations of Both Stars in a Double Degenerate Binary
Samuel J. Boos, Dean M. Townsley, Ken J. Shen
The precise origin of Type Ia supernovae (SNe Ia) is unknown despite their value to numerous areas in astronomy. While it is a long-standing consensus that they arise from an explo…
Evidence for saturated and disrupted magnetic braking from samples of detached close binaries with M and K dwarfs
Diogo Belloni, Matthias R. Schreiber, Maxwell Moe +2
Context. Recent observations of close detached eclipsing M and K dwarf binaries have provided substantial support for magnetic saturation when stars rotate sufficiently fast, leadi…