The Buchdahl stability bound in Eddington-inspired Born-Infeld gravity  

作　　者：Wei-Xiang Feng Chao-Qiang Geng Ling-Wei Luo 冯维祥;耿朝强;罗令崴(Department of Physics and Astronomy,University of California,Riverside,California 92521;Department of Physics,National Tsing Hua University,Hsinchu 300;Physics Division,National Center for Theoretical Sciences,Hsinchu 300;Synergetic Innovation Center for Quantum Effects and Applications (SICQEA),Hunan Normal University,Changsha 410081;Institute of Physics,Academia Sinica,Taipei 11529)

机构地区：[1]Department of Physics and Astronomy,University of California,Riverside,California 92521 [2]Department of Physics,National Tsing Hua University,Hsinchu 300 [3]Physics Division,National Center for Theoretical Sciences,Hsinchu 300 [4]Synergetic Innovation Center for Quantum Effects and Applications (SICQEA),Hunan Normal University,Changsha 410081 [5]Institute of Physics,Academia Sinica,Taipei 11529

出　　处：《Chinese Physics C》2019年第8期86-92,共7页中国物理C（英文版）

基　　金：Supported in part by National Center for Theoretical Sciences and Mo ST(Mo ST-104-2112-M-007-003-MY3 and Mo ST-107-2119-M-007-013-MY3);Academia Sinica Career Development Award Program(AS-CDA-105-M06)

摘　　要：We give the Buchdahl stability bound in Eddington-inspired Born-Infeld(EiBI)gravity.We show that this bound depends on an energy condition controlled by the model parameter K.From this bound,we can constrain κ≤10~8 m^2 if a neutron star with a mass around 3 M is observed in the future.In addition,to avoid the potential pathologies in EiBI,a Hagedorn-like equation of state associated with κ at the center of a compact star is inevitable,which is similar to the Hagedorn temperature in string theory.We give the Buchdahl stability bound in Eddington-inspired Born-Infeld (EiBI) gravity. We show that this bound depends on an energy condition controlled by the model parameter κ. From this bound, we can constrain κ≤10^8m^2 if a neutron star with a mass around 3M⊙ is observed in the future. In addition, to avoid the potential pathologies in EiBI, a Hagedorn-like equation of state associated with κ at the center of a compact star is inevitable, which is similar to the Hagedorn temperature in string theory.

关 键 词：Eddington-inspired BORN-INFELD GRAVITY Buchdahl STABILITY BOUND Hagedom-like equation of state compact STARS 

分 类 号：O4[理学—物理]