13 citations · 24 across the 7 of their papers we have counts for
7 papers
Post-Supernova Accretion of Light Elements onto a New-Born Neutron Star and NS 1987A
Natalia de Jesús Baz-Pérez, Dany Page, Simon Guichandut +3
We model early accretion of light elements, He, C, and O, onto a new-born neutron star using the public stellar evolution code MESA, simulating what may happen during the first few…
Weak Bursts on Slowly Accreting Neutron Stars
Sierra Casten, Simon Guichandut, Andrew Cumming +1
Nearly all observed thermonuclear X-ray bursts are thought to be triggered by the thermally unstable triple-alpha process. Unlike in accreting white dwarfs, the $\gtrsim10^{8} \mat…
Line detections in photospheric radius expansion bursts from 4U 1820-303
F. Barra, D. Barret, C. Pinto +3
Context: NICER (Neutron star Interior Composition ExploreR) is the instrument of choice for the spectral analysis of type I X-ray bursts, as it provides high throughput at X-ray CC…
The Challenges of Modeling Astrophysical Reacting Flows
Michael Zingale, Khanak Bhargava, Ryan Brady +5
Stellar evolution is driven by the changing composition of a star from nuclear reactions. At the late stages of evolution and during explosive events, the timescale can be short an…
Hydrodynamical simulations of proton ingestion flashes in Type I X-ray Bursts
Simon Guichandut, Michael Zingale, Andrew Cumming
We perform the first multidimensional fluid simulations of thermonuclear helium ignition underneath a hydrogen-rich shell. This situation is relevant to Type I X-ray bursts on neut…
The imprint of convection on Type I X-ray bursts: Pauses in photospheric radius expansion lightcurves
Simon Guichandut, Andrew Cumming
Motivated by the recent observation by NICER of a type I X-ray burst from SAX J1808.4-3658 with a distinct "pause" feature during its rise (Bult et al. 2019), we show that bursts w…
Expanded atmospheres and winds in Type I X-ray bursts from accreting neutron stars
Simon Guichandut, Andrew Cumming, Maurizio Falanga +2
We calculate steady-state models of radiation-driven super-Eddington winds and static expanded envelopes of neutron stars caused by high luminosities in type I X-ray bursts. We use…