K Li,M Arif,D G Cory et al.
K Li et al.
The physical origin of the dark energy that causes the accelerated expansion rate of the Universe is one of the major open questions of cosmology. One set of theories postulates the existence of a self-interacting scalar field for dark ener...
Chloe B Richards,Thomas W Baumgarte,Stuart L Shapiro
Chloe B Richards
We revisit the system consisting of a neutron star that harbors a small, possibly primordial, black hole at its center, focusing on a nonspinning black hole embedded in a nonrotating neutron star. Extending earlier treatments, we provide an...
Dark matter interpretation of the Fermi-LAT observations toward the outer halo of M31 [0.03%]
M31外晕的FermiLAT观测的暗物质解释
Christopher M Karwin,Simona Murgia,Igor V Moskalenko et al.
Christopher M Karwin et al.
An excess γ-ray signal toward the outer halo of M31 has recently been reported. Although other explanations are plausible, the possibility that it arises from dark matter (DM) is valid. In this work we interpret the excess in the framework...
Gravitational waves from disks around spinning black holes: Simulations in full general relativity [0.03%]
旋转黑洞周围盘状物产生的引力波：完整广义相对论中的模拟实验
Erik Wessel,Vasileios Paschalidis,Antonios Tsokaros et al.
Erik Wessel et al.
We present fully general-relativistic numerical evolutions of self-gravitating tori around spinning black holes with dimensionless spin a/M = 0.7 parallel or antiparallel to the disk angular momentum. The initial disks are unstable to the h...
Black hole-neutron star coalescence: Effects of the neutron star spin on jet launching and dynamical ejecta mass [0.03%]
黑洞-中子星并合：中子星自旋对喷流产生和动力学抛射物质量的影响
Milton Ruiz,Vasileios Paschalidis,Antonios Tsokaros et al.
Milton Ruiz et al.
Black hole-neutron star (BHNS) mergers are thought to be sources of gravitational waves (GWs) with coincident electromagnetic (EM) counterparts. To further probe whether these systems are viable progenitors of short gamma-ray bursts (SGRBs)...
Galactic PeVatrons and helping to find them: Effects of galactic absorption on the observed spectra of very high energy γ-ray sources [0.03%]
银河系PeVatron及其寻找方法：银河吸收对甚高能γ射线源观测光谱的影响
T A Porter,G P Rowell,G Jóhannesson et al.
T A Porter et al.
Identification of the cosmic-ray (CR) "PeVatrons," which are sources capable of accelerating particles to ~1015 eV energies and higher, may lead to resolving the long-standing question of the origin of the spectral feature in the all-partic...
Star clusters, self-interacting dark matter halos, and black hole cusps: The fluid conduction model and its extension to general relativity [0.03%]
星团，自相互作用暗物质晕和黑洞的尖灭：流体导电模型及其在广义相对论中的延伸
Stuart L Shapiro
Stuart L Shapiro
We adopt the fluid conduction approximation to study the evolution of spherical star clusters and self-interacting dark matter (SIDM) halos. We also explore the formation and dynamical impact of density cusps that arise in both systems due ...
Simulating the magnetorotational collapse of supermassive stars: Incorporating gas pressure perturbations and different rotation profiles [0.03%]
模拟超大质量恒星的磁旋转坍缩：包含气体压力扰动和不同的旋转曲线
Lunan Sun,Milton Ruiz,Stuart L Shapiro
Lunan Sun
Collapsing supermassive stars (SMSs) with masses M ≳ 104-6 M ⊙ have long been speculated to be the seeds that can grow and become supermassive black holes (SMBHs). We previously performed general relativistic magnetohydrodynamic (GRMHD) s...
Thomas W Baumgarte,Stuart L Shapiro
Thomas W Baumgarte
We explore in general relativity the survival time of neutron stars that host an endoparasitic, possibly primordial, black hole at their center. Corresponding to the minimum steady-state Bondi accretion rate for adiabatic flow that we found...
Magnetohydrodynamic simulations of binary neutron star mergers in general relativity: Effects of magnetic field orientation on jet launching [0.03%]
广义相对论中双中子星合并的磁流体动力学模拟：磁场方向对喷流发射的影响
Milton Ruiz,Antonios Tsokaros,Stuart L Shapiro
Milton Ruiz
Binary neutron star mergers can be sources of gravitational waves coincident with electromagnetic counterpart emission across the spectrum. To solidify their role as multimessenger sources, we present fully 3D, general relativistic, magneto...