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Binary population synthesis predicts the existence of subdwarf B stars (sdBs) with neutron star (NS) or black hole (BH) companions. We systematically investigate the formation of sdB+NS binaries from binary evolution and aim to obtain some…

Solar and Stellar Astrophysics · Physics 2018-10-10 You Wu , Xuefei Chen , Zhenwei Li , Zhanwen Han

Based on the database compiled in the first article of this series, with 56 SN events discovered in 3838 galaxies of the southern hemisphere, we compute the rate of supernovae (SNe) of different types along the Hubble sequence normalized to…

Cosmology and Nongalactic Astrophysics · Physics 2012-01-17 A. A. Hakobyan , A. R. Petrosian , G. A. Mamon , B. McLean , D. Kunth , M. Turatto , E. Cappellaro , F. Mannucci , R. J. Allen , N. Panagia , M. Della Valle

The origin of hot subdwarf B stars (sdBs) is still unclear. About half of the known sdBs are in close binary systems for which common envelope ejection is the most likely formation channel. Little is known about this dynamic phase of binary…

Solar and Stellar Astrophysics · Physics 2015-05-19 S. Geier , U. Heber , Ph. Podsiadlowski , H. Edelmann , R. Napiwotzki , T. Kupfer , S. Mueller

In the dense stellar environment of the globular clusters, compact binaries are produced dynamically. Therefore the fraction of type Ia supernovae that explode in globular clusters is expected to be higher than the fraction of mass residing…

High Energy Astrophysical Phenomena · Physics 2015-06-03 R. Voss , G. Nelemans

The majority of massive stars are formed in binary systems. It is hence reasonable to expect that most core-collapse supernovae (CCSNe) take place in binaries and the existence of a companion star may leave some imprints in observed…

High Energy Astrophysical Phenomena · Physics 2015-06-19 Ryosuke Hirai , Hidetomo Sawai , Shoichi Yamada

Massive stars with a core-halo structure are interesting objects for stellar physics and hydrodynamics. Using simulations for stellar evolution, radiation hydrodynamics, and radiative transfer, we study the explosion of stars with an…

High Energy Astrophysical Phenomena · Physics 2018-05-02 Luc Dessart , Sung-Chul Yoon , Eli Livne , Roni Waldman

While it is generally accepted that Type Ia supernovae are the result of the explosion of a carbon-oxygen White Dwarf accreting mass in a binary system, the details of their genesis still elude us, and the nature of the binary companion is…

Hot subdwarf stars (sdO/Bs) are evolved core helium-burning stars with very thin hydrogen envelopes, which can be formed by common envelope ejection. Close sdB binaries with massive white dwarf (WD) companions are potential progenitors of…

Solar and Stellar Astrophysics · Physics 2016-12-12 S. Geier , T. Kupfer , U. Heber , P. Nemeth , E. Ziegerer , A. Irrgang , M. Schindewolf , T. R. Marsh , B. T. Gänsicke , B. N. Barlow , S. Bloemen

The observations of supernovae (SNe) Ic occurring after the prompt emission of long gamma-ray bursts (GRBs) are addressed within the binary-driven hypernova (BdHN) model where GRBs originate from a binary composed of a $\sim10M_\odot$…

I review the physical properties of pair-production supernovae (PPSNe) as well as the prospects for them to be constrained observationally. In very massive (140-260 solar mass) stars, much of the pressure support comes from the radiation…

Astrophysics · Physics 2007-05-23 Evan Scannapieco

Be/X-ray binaries comprise roughly two-thirds of the high-mass X-ray binaries (HMXBs), which is a class of X-ray binaries that results from the high mass of the companion or donor star (> 10 solar masses). Currently the formation and…

Astrophysics · Physics 2007-05-23 P. D. Kiel , J. R. Hurley , J. R. Murray , K. Hayasaki

We present the results of the stellar feedback from Pop III binaries by employing improved, more realistic Pop III evolutionary stellar models. To facilitate a meaningful comparison, we consider a fixed mass of 60 solar masses (Msun)…

Astrophysics of Galaxies · Physics 2015-06-22 Ke-Jung Chen , Volker Bromm , Alexander Heger , Myoungwon Jeon , Stan Woosley

At least one, but more likely two or more, eccentric neutron-star, carbon-oxygen white-dwarf binaries with an unrecycled pulsar have been observed. According to the standard scenario for evolving neutron stars which are recycled in common…

Astrophysics · Physics 2015-06-24 G. E. Brown , C. -H. Lee , S. F. Portegies Zwart , H. A. Bethe

We report here on two complementary population synthesis studies which relate directly to the formation and evolution of neutron star binaries in globular clusters. In the first, we compute the probability of retaining neutron stars in…

Astrophysics · Physics 2007-05-23 Saul Rappaport , Eric Pfahl , Fred Rasio , Philipp Podsiadlowski

In studying encounters between binaries and single stars, one is interested in three classes of events: exchanges of stars, hardening of the original binary by a third star, and the production of merged objects. We present a means for…

Astrophysics · Physics 2015-06-24 M. B. Davies

Nuclear star clusters that surround supermassive black holes (SMBHs) in galactic nuclei are among the densest systems in the Universe, harbouring millions of stars and compact objects (COs). Within a few parsecs from the SMBH, stars can…

High Energy Astrophysical Phenomena · Physics 2019-11-06 Giacomo Fragione , Idan Ginsburg , Abraham Loeb

Mergers of black hole-neutron star (BHNS) binaries have now been observed by GW detectors with the recent announcement of GW200105 and GW200115. Such observations not only provide confirmation that these systems exist, but will also give…

Compact binaries containing hot subdwarfs and white dwarfs have the potential to evolve into a variety of explosive transients. These systems could also explain hypervelocity runaway stars such as US 708. We use the detailed binary…

Fully convective M dwarfs typically remain rapidly rotating and magnetically active for billions of years, followed by an abrupt and mass-dependent transition to slow rotation and quiescence. A robust understanding of this process is…

Solar and Stellar Astrophysics · Physics 2024-03-21 Emily K. Pass , David Charbonneau , David W. Latham , Perry Berlind , Michael L. Calkins , Gilbert A. Esquerdo , Jessica Mink

For typical models of binary statistics, 50-70% of core-collapse supernova (ccSN) progenitors are members of a stellar binary at the time of the explosion. Independent of any consequences of mass transfer, this has observational…

Solar and Stellar Astrophysics · Physics 2014-11-20 C. S. Kochanek
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