The Infiuence of Velocity-dependent Correction Factor on Proton Decay Reactions in Massive White Dwarfs  

作　　者：Jing-Jing Liu Dong-Mei Liu 

机构地区：[1]College of Science,Hainan Tropical Ocean University,Sanya 572022,China

出　　处：《Research in Astronomy and Astrophysics》2024年第3期169-179,共11页天文和天体物理学研究（英文版）

基　　金：supported in part by the National Natural Science Foundation of China(NSFC,grant Nos.11965010 and 11565020);the foundation for high-level talents program of Hainan basic and applied basic research program(natural science)under grant 2019RC239;the Natural Science Foundation of Hainan Province under grants 118MS071 and 114012;the Counterpart Foundation of Sanya under grants 2016PT43 and 2019PT76;the Special Foundation of Science and Technology Cooperation for Advanced Academy and Regional of Sanya under grant 2016YD28;the Scientific Research Starting Foundation for 515 Talented Project of Hainan Tropical Ocean University under grant RHDRC201701。

摘　　要：Twenty-five typical massive white dwarfs(WDs)are selected and the proton decay reaction catalyzed by magnetic monopoles(MMs)for these WDs is discussed.A velocity-dependent correction factor strongly affects the cross-section.We find that a strong suppression controls the monopole catalysis of nucleon decay by the correction factor.The maximum number of MMs is captured and the luminosity can be 2.235×10^(21)and 1.7859×10^(32)erg s^(-1)(e.g.,for the O+Ne core mass WD J055631.17+130639.78).The luminosities of most massive WDs agree well with the observations at relatively low temperatures(e.g.,T_(6)=0.1),but can be three and two orders of magnitude higher than those of the observations for model(Ⅰ)and(Ⅱ)at relatively high temperatures(e.g.,T_(6)=10),respectively.The luminosities of model(Ⅰ)are about one order of magnitude higher than those of model(Ⅱ).Since we consider the effect of the number of MMs captured on the mass–radius relation and the suppression of the proton decay by the correction factor,the study by model(Ⅱ)may be an improved estimation.

关 键 词：astroparticle physics-nuclear reactions-nucleosynthesis-abundances-(stars) white dwarfs 

分 类 号：P145.5[天文地球—天体物理]