Results 111 to 120 of about 5,806,348 (275)

The Evolution of Compact Binary Star Systems

Living Reviews in Relativity, 2006
We review the formation and evolution of compact binary stars consisting of white dwarfs (WDs), neutron stars (NSs), and black holes (BHs). Binary NSs and BHs are thought to be the primary astrophysical sources of gravitational waves (GWs) within the ...
Yungelson, Lev R., Postnov Konstantin A.
doaj  

A New Route to Massive Hot Subdwarfs: Common Envelope Ejection from Asymptotic Giant Branch Stars

The Astrophysical Journal
The hot subdwarf O/B stars (sdO/Bs) are known as extreme horizontal branch stars, which is of great importance in stellar evolution theory. The sdO/Bs are generally thought to have a helium-burning core and a thin hydrogen envelope ( M _env < 0.02 M _⊙ ).
Zhenwei Li, Yangyang Zhang, Hailiang Chen, Hongwei Ge, Dengkai Jiang, Jiangdan Li, Xuefei Chen, Zhanwen Han   +7 more
doaj   +1 more source

Simulating the onset of grazing envelope evolution of binary stars

, 2019
<p>MESA files associated with <a href="https://ui.adsabs.harvard.edu/#abs/2017MNRAS.465L..54S/abstract">Simulating the onset of grazing envelope evolution of binary stars</a></p ...
Shiber, Sagiv (6467738), Shiber, Sagiv, Kashi, Amit, Kashi, Amit (6467741), Soker, Noam (6442931), Soker, Noam   +5 more
core   +1 more source

The effects of the Observational Selection Criteria on the post common envelope white dwarf-main sequence binary population [PDF]

, 2010
We present a detailed Monte Carlo simulator of the Galactic population of binary stars. Preliminary results are presented for the white dwarf-main sequence (WD+MS) binary population resulting from a common envelope (CE) episode.
Rebassa Mansergas, Alberto, Camacho Díaz, Judit, Zorotovic, Mónica, Schreiber, Mathias R., Rebassa-Mansergas, Alberto, Torres Gil, Santiago, García-Berro Montilla, Enrique   +6 more
core   +1 more source

Copula‐based joint modelling of emergency department visits with time‐varying dependence

Canadian Journal of Statistics, EarlyView.
Abstract Jointly modelling multiple correlated count time series is essential in health services research, where outcomes like emergency visits for mental health and substance use often evolve together. Ignoring these dependencies can obscure meaningful trends and limit the effectiveness of policy evaluation.
Guanjie Lyu, Cindy Feng, Lihui Liu
wiley   +1 more source

Adiabatic Mass Loss in Binary Stars. IV. Low- and Intermediate-mass Helium Binary Stars

The Astrophysical Journal Supplement Series
The unstable mass transfer situation in binary systems will asymptotically cause the adiabatic expansion of the donor star and finally lead to the common envelope phase.
Lifu Zhang, Hongwei Ge, Xuefei Chen, Zhanwen Han   +3 more
doaj   +1 more source

A Meta‐Analytic Review of Board Characteristics and Carbon Emission Disclosure: The Moderating Effect of Contextual Factors

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT The relationship between board governance and corporate carbon emission disclosure remains persistently inconsistent across the empirical literature, despite decades of accumulated evidence. Drawing on agency, stakeholder, legitimacy, institutional, and upper echelons perspectives within a single analytical framework, we conduct a three‐level ...
Mohamed Hegazy, Diego Prior, Mahmoud Zarea   +2 more
wiley   +1 more source

First Double Red Giant Algol System with Active Mass Transfer

The Astronomical Journal
Double red giant stars are very important for studies of the stability of mass transfer, common-envelope evolution, and the formation of double white dwarfs with short orbital periods.
Mikhail Yu. Kovalev, Hailiang Chen, Sufen Guo, Jiao Li, Hongwei Ge, Dengkai Jiang, Marina A. Burlak, Natalia P. Ikonnikova, Xuefei Chen, Zhanwen Han   +9 more
doaj   +1 more source

Exponentially‐constrained Gaussian mixture model for quantifying vertical development of water‐conducting fracture zones in lithologically stratified mining roofs

Deep Underground Science and Engineering, EarlyView.
This study proposes an exponentially‐constrained Gaussian mixture model (EcGMM) to quantify vertical fracture heterogeneity in stratified roof strata. The model integrates a piecewise exponential decay term capturing global stress dissipation with Gaussian components representing localized fracture intensification at lithological interfaces.
Huiqing Yuan, Zhimin Xu, Weixiao Chen, Chenghang Zhang, Shijie Xiong, Yajun Sun   +5 more
wiley   +1 more source

r-process Nucleosynthesis from Hyperaccreting Neutron Stars in Common Envelopes

The Astrophysical Journal
We investigate nuclear reactions and feedback in hyperaccreting neutron star environments, considering accretion rates in the range 0.3–3 × 10 ^4 M _⊙ yr ^−1 , typical of short-period compact-object binaries in common envelopes.
Peter Anninos, Matthew E. Portman, Scott R. Carmichael, Robert D. Hoffman, Andre Sieverding   +4 more
doaj   +1 more source