Fermion-boson stars with a quartic self-interaction in the boson sector

对具有四次自相互作用的致密星和费米-玻色星的观测研究

Observations of compact stars and fermion-boson stars with a quartic self-interaction

本研究探讨了致密星可由具有四次自相互作用的费米-玻色星描述的可能性，通过调节多方状态方程参数、玻色子质量和自相互作用参数构建平衡构型，发现玻色子部分的加入及正自相互作用更符合NICE、NICER/XMM-Newton和LIGO的观测约束。

具有四次或六次自相互作用的旋转玻色星链

Chains of rotating boson stars with quartic or sextic self-interaction

本文研究了具有四次或六次自相互作用的旋转玻色星链，探讨了其全局性质和稳定性，发现奇偶性影响质量、角动量及能圈形态。

具有四次自相互作用的矢量玻色子星解

Vector boson star solutions with a quartic order self-interaction

研究了具有矢量场$λ(A^μ\bar{A}_μ)^2/4$和质量项$μ\bar{A}^μA_μ/2$的四阶自相互作用的Einstein-Proca理论中的玻色子星（BS）解，其中$A_μ$是复矢量场，${\bar A}_μ$是$A_μ$的复共轭，$λ$和$μ$分别是矢量场的耦合常数和质量.矢量BS的特征在于两个守恒量，Arnowitt-Deser-Misner（ADM）质量和Noether电荷与全球$U(1)$对称性。我们发现，在没有自相互作用的情况下相比，$λ=0$，最大ADM质量和Noether电荷增加$λ>0$和减少$λ<0$。我们还表明，存在的临界中心振幅的时间分量的向量场，在此之上没有矢量BS的解决方案，并为$λ>0$，它可以表示为简单的解析表达式。对于足够大的正耦合$Λ:=M_{pl}^2λ/(8πμ^2) \gg 1$，由${\cal O}[\sqrtλM_{pl}^3/μ^2 \ln (λM_{pl}^2/μ^2)]$的临界中心振幅和得到了矢量BS的最大ADM质量和Noether荷，这与标量BS的最大ADM质量和Noether荷${\cal O}(\sqrt{λ_ϕ}M_{pl}^3/μ_ϕ^2)$不同，其中$λ_ϕ$和$μ_ϕ$是耦合常数和复标量场的质量.

具有电荷和磁荷的U(1)规范不变标量-向量-张量理论中的双电 hairy 黑洞：三次和四次相互作用

Dyonic hairy black holes in $U(1)$ gauge-invariant scalar-vector-tensor theories: Cubic and quartic SVT sectors

研究在U(1)规范不变标量-向量-张量理论中构建具有电荷和磁荷的hairy黑洞解，分析三次和四次相互作用项的影响，揭示磁荷在激活特定相互作用中的作用，并验证解的正则性。

NNNLO gravitational quadratic-in-spin interactions at the quartic order in G

We compute the N$^3$LO gravitational quadratic-in-spin interactions at $G^4$ in the post-Newtonian (PN) expansion via the effective field theory (EFT) of gravitating spinning objects for the first time. This result contributes at the $5$PN order for maximally-spinning compact objects, adding the spinning case to the static sector at this PN accuracy. This sector requires extending the EFT of a spinning particle beyond linear order in the curvature to include higher-order operators quadratic in the curvature that are relevant at this PN order. We make use of a diagrammatic expansion in the worl…

Self-interacting multistate boson stars

In this paper, we consider rotating multistate boson stars with quartic self-interactions. In contrast to the nodeless quartic-boson stars in \cite{Herdeiro:2015tia}, the self-interacting multistate boson stars (SIMBSs) have two types of nodes, including the $^1S^2S$ and $^1S^2P$ states. We show the mass $M$ of SIMBSs as a function of the synchronized frequency $ω$, and the nonsynchronized frequency $ω_2$ for three different cases. Moreover, for the case of two coexisting states with self-interacting potential, we study the mass $M$ of SIMBSs versus the angular momentum $J$ for the synchronize…