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9 papers · 2 filters
The Formation of a 70 Msun Black Hole at High Metallicity
K. Belczynski, R. Hirschi, E. A. Kaiser +7
A 70Msun BH was discovered in Milky Way disk in a long period and almost circular detached binary system (LB-1) with a high metallicity 8Msun B star companion. Current consensus on…
Multi-epoch X-ray burst modelling: MCMC with large grids of 1D simulations
Zac Johnston, Alexander Heger, Duncan K. Galloway
Type-I X-ray bursts are recurring thermonuclear explosions on the surface of accreting neutron stars. Matching observed bursts to computational models can help to constrain system…
X-Ray and Gamma-Ray Emission From Core-collapse Supernovae: Comparison of Three-dimensional Neutrino-driven Explosions With SN 1987A
Dennis Alp, Josefin Larsson, Keiichi Maeda +7
During the first few hundred days after the explosion, core-collapse supernovae (SNe) emit down-scattered X-rays and gamma-rays originating from radioactive line emissions, primari…
A Bayesian Approach to Matching Thermonuclear X-ray Burst Observations with Models
A. J. Goodwin, D. K. Galloway, A. Heger +2
We present a new method of matching observations of Type I (thermonuclear) X-ray bursts with models, comparing the predictions of a semi-analytic ignition model with X-ray observat…
Presupernova neutrino signals as potential probes of neutrino mass hierarchy
Gang Guo, Yong-Zhong Qian, Alexander Heger
We assess the potential of using presupernova neutrino signals at the Jiangmen Underground Neutrino Observatory (JUNO) to probe the yet-unknown neutrino mass hierarchy. Using model…
Fallback accretion powered supernova light curves based on a neutrino-driven explosion simulation of a 40 Msun star
Takashi J. Moriya, Bernhard Muller, Conrad Chan +2
We present synthetic light curves of fallback-powered supernovae based on a neutrino-driven explosion of a 40 Msun zero-metallicity star with significant fallback accretion onto a…