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Parameterizing the Supernova Engine and its Effects on Remnants and Basic Yields
Chris L. Fryer, Sydney Andrews, Wesley Even +2
Core-collapse supernova science is now entering an era where engine models are beginning to make both qualitative and quantitative predictions. Although the evidence in support of…
Black hole hyperaccretion inflow-outflow model. I. long and ultra-long gamma-ray bursts
Tong Liu, Cui-Ying Song, Bing Zhang +2
Long-duration gamma-ray bursts (LGRBs) and ultra-LGRBs (ULGRBs) originate from collapsars, in the center of which a newborn rotating stellar-mass black hole (BH) surrounded by a ma…
A First Transients Survey with JWST: the FLARE project
Lifan Wang, D. Baade, E. Baron +43
JWST was conceived and built to answer one of the most fundamental questions that humans can address empirically: "How did the Universe make its first stars?". Our First Lights At…
New Neutron-Capture Site in Massive Pop III and Pop II Stars as a Source for Heavy Elements in the Early Galaxy
Projjwal Banerjee, Yong-Zhong Qian, Alexander Heger
We propose a new neutron-capture site in early metal-poor and metal-free stars of -- that results from proton ingestion in the He shell during late…
Simulating X-ray bursts during a transient accretion event
Zac Johnston, Alexander Heger, Duncan K. Galloway
Modelling of thermonuclear X-ray bursts on accreting neutron stars has to date focused on stable accretion rates. However, bursts are also observed during episodes of transient acc…
Black hole formation and fallback during the supernova explosion of a star
Conrad Chan, Bernhard Müller, Alexander Heger +2
Fallback in core-collapse supernovae is considered a major ingredient for explaining abundance anomalies in metal-poor stars and the natal kicks and spins of black holes (BHs). We…
High Resolution Study of Presupernova Compactness
Tuguldur Sukhbold, Stan Woosley, Alexander Heger
The density structure surrounding the iron core of a massive star when it dies is known to have a major effect on whether or not the star explodes. Here we repeat previous surveys…
Thermonuclear Bursts with Short Recurrence Times from Neutron Stars Explained by Opacity-Driven Convection
L. Keek, A. Heger
Thermonuclear flashes of hydrogen and helium accreted onto neutron stars produce the frequently observed Type I X-ray bursts. It is the current paradigm that almost all material bu…
The Evolution of Supermassive Population III Stars
Lionel Haemmerlé, Tyrone E. Woods, Ralf S. Klessen +2
Supermassive primordial stars forming in atomically-cooled halos at are currently thought to be the progenitors of the earliest quasars in the Universe. In this pictu…
Reducing Uncertainties in the Production of the Gamma Emitting Nuclei 26Al, 44Ti, and 60Fe in Core Collapse Supernovae by Using Effective Helium Burning Rates
Sam Austin, Christopher West, Alexander Heger
We have used effective reaction rates (ERR) for the helium burning reactions to predict the yield of the gamma-emitting nuclei 26Al, 44Ti, and 60Fe in core col- lapse supernovae. T…
The quest for blue supergiants: binary merger models for the evolution of the progenitor of SN 1987A
Athira Menon, Alexander Heger
We present the results of a detailed, systematic stellar evolution study of binary mergers for blue supergiant (BSG) progenitors of Type II supernovae. In particular, these are the…
On the Maximum Mass of Accreting Primordial Supermassive Stars
T. E. Woods, Alexander Heger, Daniel J. Whalen +2
Supermassive primordial stars are suspected to be the progenitors of the most massive quasars at z~6. Previous studies of such stars were either unable to resolve hydrodynamical ti…
Nucleosynthesis in the Innermost Ejecta of Neutrino-Drive Supernova Explosions in Two Dimensions
Shinya Wanajo, Bernhard Müller, Hans-Thomas Janka +1
We examine the nucleosynthesis in the innermost, neutrino-processed ejecta (a few ) of self-consistent, two-dimensional explosion models of core-collapse supernov…