Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Coleman, Matthew S. B."'
The neutrino-driven wind cooling phase of proto-neutron stars (PNSs) follows successful supernovae. Wind models without magnetic fields or rotation fail to achieve the necessary conditions for production of the third $r-$process peak, but robustly pr
Externí odkaz:
http://arxiv.org/abs/2402.06003
Using twenty long-term 3D core-collapse supernova simulations, we find that lower compactness progenitors that explode quasi-spherically due to the short delay to explosion experience smaller neutron star recoil kicks in the $\sim$100$-$200 km s$^{-1
Externí odkaz:
http://arxiv.org/abs/2311.12109
Publikováno v:
Monthly Notices of the Royal Astronomical Society 2023, Volume 526, Issue 2, pp.3141-3155
Rapidly rotating magnetars have been associated with gamma-ray bursts (GRBs) and super-luminous supernovae (SLSNe). Using a suite of 2D magnetohydrodynamic simulations at fixed neutrino luminosity and a couple of evolutionary models with evolving neu
Externí odkaz:
http://arxiv.org/abs/2305.16412
Publikováno v:
MNRAS, 526, 3, 4418-4434 (2023)
We consider the general problem of a Parker-type non-relativistic isothermal wind from a rotating and magnetic star. Using the magnetohydrodynamics (MHD) code athena++, we construct an array of simulations in the stellar rotation rate $\Omega_\ast$ a
Externí odkaz:
http://arxiv.org/abs/2302.05462
Autor:
Vartanyan, David, Burrows, Adam, Wang, Tianshu, Coleman, Matthew S. B., White, Christopher J.
We calculate the gravitational-wave (GW) signatures of detailed 3D core-collapse supernova simulations spanning a range of massive stars. Most of the simulations are carried out to times late enough to capture more than 95% of the total GW emission.
Externí odkaz:
http://arxiv.org/abs/2302.07092
Autor:
Coleman, Matthew S. B., Burrows, Adam
Using simulations of non-rotating supernova progenitors, we explore the kicks imparted to and the spins induced in the compact objects birthed in core collapse. We find that the recoil due to neutrino emissions can be a factor affecting core recoil,
Externí odkaz:
http://arxiv.org/abs/2209.02711
Publikováno v:
Monthly Notices of the Royal Astronomical Society 2022, Volume 517, Issue 2, pp.3008-3023
In the seconds following their formation in core-collapse supernovae, "proto"-magnetars drive neutrino-heated magneto-centrifugal winds. Using a suite of two-dimensional axisymmetric MHD simulations, we show that relatively slowly rotating magnetars
Externí odkaz:
http://arxiv.org/abs/2208.09042
Calibrating with detailed 2D core-collapse supernova simulations, we derive a simple core-collapse supernova explosion condition based solely upon the terminal density profiles of state-of-the-art stellar evolution calculations of the progenitor mass
Externí odkaz:
http://arxiv.org/abs/2207.02231
Astrophysical objects possessing a material surface (white dwarfs, young stars, etc.) may accrete gas from the disc through the so-called surface boundary layer (BL), in which the angular velocity of the accreting gas experiences a sharp drop. Acoust
Externí odkaz:
http://arxiv.org/abs/2111.03068
In order to address the generation of neutron star magnetic fields, with particular focus on the dichotomy between magnetars and radio pulsars, we consider the properties of dynamos as inferred from other astrophysical systems. With sufficiently low
Externí odkaz:
http://arxiv.org/abs/2111.01814