4 citations · 4 across the 11 of their papers we have counts for
12 papers
Evolution of Massive Main-Sequence Stars in Binary Population Synthesis. II. Consequences for Black Hole High-Mass X-ray Binaries and Binary Black Holes
Adam Brček, Ryosuke Hirai, Ilya Mandel +1
Interactions and mass loss during the main-sequence (MS) phase of massive binary stars can significantly alter their subsequent evolution and the properties of the black holes (BHs…
The Kick Velocities of Neutron Stars in Binary Systems
Paul Disberg, Ilya Mandel, Ryosuke Hirai
Neutron stars (NSs) receive natal kicks on their formation in supernovae (SNe). We consider constraints placed on the natal kick magnitudes by NSs in different classes of binary sy…
The Best Guess: Testing new and old formalisms for the common envelope against observations
Riley Thai, Amanda Karakas, Amanda I. Karakas +8
We present a systematic test of formalisms for common envelope evolution by forward-modelling observable post-common envelope binaries. We compare predictions from the -formalis…
On Bimodality in the Eccentricity Distribution of Galactic Double Neutron Stars
Aldana Grichener, Paul Disberg, Ryosuke Hirai +1
The detection of Galactic double neutron stars (DNSs) through pulsar timing offers a unique opportunity to probe massive stellar and binary evolution. The observed DNS population e…
Impacts of hydrogen envelope on supernova fallback and the resulting compact remnant masses
Kengo Shinoda, Yudai Suwa, Ryosuke Hirai +4
Fallback in core-collapse supernovae plays a central role in setting compact-remnant masses and may produce late-time emission. In hydrogen rich progenitors, the reverse shock aris…
Delayed Wind Onset in Pa 30, the Remnant of Type Iax SN 1181
Takatoshi Ko, Ryosuke Hirai, Taiga Sasaoka +1
Pa 30 is the recently identified remnant of the historical supernova SN 1181, likely a Type Iax event, and a nebula surrounding the central white dwarf launching a fast wind ($\sim…
Population Synthesis Study on the Binary Origin of Type Ibn Supernovae
Takatoshi Ko, Tomoya Kinugawa, Daichi Tsuna +2
Type Ibn supernovae (SNe) are a class of SN explosions whose progenitors are surrounded by dense helium-rich circumstellar matter (CSM). Some models have been proposed for how to f…
Common envelopes at StanFest
Ilya Mandel, Ryosuke Hirai, Lewis Picker
We describe some of our group's recent work on common envelopes. Our goal is to understand the onset and outcomes of dynamically unstable mass transfer, including the properties of…
Evolution of the Convective Core Mass during the Main Sequence
Minori Shikauchi, Ryosuke Hirai, Ilya Mandel
We construct a semi-analytical model that describes the convective core mass evolution of massive stars experiencing mass loss during the main-sequence stage. We first conduct a su…
Bumpy Superluminous Supernovae Powered by a Magnetar-star Binary Engine
Jin-Ping Zhu, Liang-Duan Liu, Yun-Wei Yu +4
Wolf-Rayet stars in close binary systems can be tidally spun up by their companions, potentially leaving behind fast-spinning highly-magnetized neutron stars, known as ``magnetars"…
Fits for the convective envelope mass in massive stars
Lewis Picker, Ryosuke Hirai, Ilya Mandel
We explore the evolution of massive stars (>8 solar masses) with 1-D models and present analytical fits to the masses and binding energies of the convective portions of their envel…
Expansion of accreting main-sequence stars during rapid mass transfer
Mike Y. M. Lau, Ryosuke Hirai, Ilya Mandel +1
Accreting main-sequence stars expand significantly when the mass accretion timescale is much shorter than their thermal timescales. This occurs during mass transfer from an evolved…