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Cassiopeia A the youngest supernova remnant known in the Milky Way is one of the brightest radio sources in the sky and a unique laboratory for supernova physics. Although its compact remnant was discovered in 1999 by the Chandra X-Ray…

高能天体物理现象 · 物理学 2015-08-06 Nissim Fraija , C. Giovanny Bernal

We present a Quantum Monte Carlo study of the zero temperature equation of state of neutron matter and the computation of the $^1S_0$ pairing gap in the low-density regime with $\rho<0.04$ fm$^{-3}$. The system is described by a…

核理论 · 物理学 2008-11-26 S. Gandolfi , A. Yu. Illarionov , S. Fantoni , F. Pederiva , K. E. Schmidt

We explore the cosmological consequences of the recently released Union2 sample of 557 Type Ia supernovae (SNIa). Combining this latest SNIa dataset with the Cosmic microwave background (CMB) anisotropy data from the Wilkinson Microwave…

宇宙学与河外天体物理 · 物理学 2011-02-02 Shuang Wang , Xiao-Dong Li , Miao Li

The observed value of the muon magnetic dipole moment, which deviates from the Standard Model prediction by $4.2\sigma$, can be explained in models with weakly-interacting massive particles (WIMPs) coupled to muons. However, a considerable…

高能物理 - 唯象学 · 物理学 2022-04-19 Koichi Hamaguchi , Natsumi Nagata , Maura E. Ramirez-Quezada

We present a new scenario for the cooling of compact stars considering the central source of Cassiopeia A (Cas A). The Cas A observation shows that the central source is a compact star that has high effective temperature, and it is…

太阳与恒星天体物理 · 物理学 2013-02-19 Tsuneo Noda , Masa-aki Hashimoto , Nobutoshi Yasutake , Toshiki Maruyama , Toshitaka Tatsumi , Masayuki Y. Fujimoto

The observations combined with theory of neutron star (NS) cooling play a crucial role in achieving the intriguing information of the stellar interior, such as the equation of state (EOS), composition and superfluidity of dense matter. The…

核理论 · 物理学 2018-09-12 J. M. Dong , L. J. Wang , W. Zuo

The separation method developed earlier by us [Nucl. Phys. {\bf A598} 390 (1996)] to calculate and analyze solutions of the BCS gap equation for $^1$S$_0$ pairing is extended and applied to $^3$P$_2$--$^3$F$_2$ pairing in pure neutron…

核理论 · 物理学 2008-11-26 V. V. Khodel , V. A. Khodel , J. W. Clark

Adopting various unified equations of state (EOSs), we examine the quasinormal modes of gravitational waves from cold neutron stars. We focus on the fundamental ($f$-), 1st pressure ($p_1$-), and 1st spacetime ($w_1$-) modes, and derive the…

高能天体物理现象 · 物理学 2021-06-23 Hajime Sotani

This paper presents a new analysis of the thermal emission from the neutron star surface to constrain the dense matter equation of state. It is based on the use of a Markov-Chain Monte Carlo algorithm combined with an empirical…

高能天体物理现象 · 物理学 2020-01-08 N. Baillot d'Etivaux , S. Guillot , J. Margueron , N. A. Webb , M. Catelan , A. Reisenegger

In this work we present results for pairing gaps in $\beta$--stable neutron star matter with electrons and muons using a relativistic Dirac--Brueckner--Hartree--Fock approach, starting with modern meson--exchange models for the…

核理论 · 物理学 2009-01-23 Oe. Elgaroey , L. Engvik , M. Hjorth-Jensen , E. Osnes

This paper presents a physics-constrained neural differential equation framework for parameterization, and employs it to model the time evolution of seasonal snow depth given hydrometeorological forcings. When trained on data from multiple…

机器学习 · 计算机科学 2025-11-13 Andrew Charbonneau , Katherine Deck , Tapio Schneider

The Quark-Hadron Chiral Parity-Doublet model (Q$\chi$P) is applied to calculate compact star properties in the presence of a deconfinement phase transition. Within this model, a consistent description of nuclear matter properties, chiral…

核理论 · 物理学 2017-12-20 A. Mukherjee , S. Schramm , J. Steinheimer , V. Dexheimer

With ongoing advancements in nuclear theory and experimentation, together with a growing body of neutron star (NS) observations, a wealth of information on the equation of state (EOS) for matter at extreme densities has become accessible.…

高能天体物理现象 · 物理学 2025-07-18 Bhaskar Biswas , Stephan Rosswog

Observations of isolated neutron stars place constraints on the equation of state (EOS) of cold, neutron-rich matter, while nuclear physics experiments probe the EOS of hot, symmetric matter. Many dynamical phenomena, such as core-collapse…

高能天体物理现象 · 物理学 2019-04-17 Carolyn A. Raithel , Feryal Ozel , Dimitrios Psaltis

The effective isospin-density dependent pairing interaction (P1) [S. S. Zhang, U. Lombardo and E. G. Zhao, Sci. Chin. Phys. Mech. Astro. {\bf 54}, 236 (2011)] extracted from neutron pairing gaps for $^1$S$_0$ in asymmetric nuclear matter…

核理论 · 物理学 2021-01-04 Xu Meng , Shisheng Zhang , Lin Guo , Lisheng Geng , Ligang Cao

Neutrino interactions with stellar material are widely believed to be fundamental to the explosion of massive stars. However, this important process has remained difficult to confirm observationally. We propose a new method to verify it…

高能天体物理现象 · 物理学 2023-07-10 Toshiki Sato , Takashi Yoshida , Hideyuki Umeda , John P. Hughes , Keiichi Maeda , Shigehiro Nagataki , Brian J. Williams

We present NeutrinoOsc3Flavor, a lightweight and fully transparent computational framework for exact three flavor neutrino oscillation studies in vacuum and constant density matter. The code numerically solves the Schrodinger evolution…

高能物理 - 唯象学 · 物理学 2026-02-04 Baktiar Wasir Farooq , Bipin Singh Koranga , Ansh Prasad , Imran Khan

Singlet $S$-wave superfluidity of dilute neutron matter is studied within the correlated BCS method, which takes into account both pairing and short-range correlations. First, the equation of state (EOS) of normal neutron matter is…

核理论 · 物理学 2017-05-15 G. E. Pavlou , E. Mavrommatis , Ch. Moustakidis , J. W. Clark

A survey of pairing properties of nucleonic matter is presented that includes the off-shell propagation associated with short-range and tensor correlations. For this purpose, the gap equation has been solved in its most general form…

核理论 · 物理学 2016-08-16 H. Müther , W. H. Dickhoff

We include the $\Delta$-isobars in the equation of state (EOS) of neutron star (NS) and study its effects with various parameter sets of the RMF model. We compare our results with the NS's constraints from the mass-radius measurement of PSR…

核理论 · 物理学 2025-01-07 Rashmita Jena , S. K. Biswal , Padmalaya Dash , R. N. Panda , M. Bhuyan