Complexity factor for a class of compact stars in f (R, T) gravity

被引:0
作者
Abbas, G. [1 ]
Ahmed, Riaz [1 ]
机构
[1] Islamia Univ Bahawalpur, Dept Math, Bahawalpur, Pakistan
关键词
Complexity factor; Self-gravitating system; f; (R; T); gravity; ENERGY;
D O I
10.1007/s10509-019-3688-8
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We investigate the concept of complexity factor for a class of compact star in the framework of modified f (R, T) gravity. We obtain a generic form of hydrostatic equilibrium equation, express the Einstein field equations, mass function and also physical observation for linear form of function f (R, T) = R+ 2 lambda T, where. is the coupling parameter, R is Ricci scalar and T is trace of energy momentum tensor. We have analyzed the properties of compact astrophysical objects like energy density and anisotropic pressure are affected by changing the values of coupling parameter.. We obtained numerical outputs of some physical variables for different chosen values of coupling parameter. to observe the effect of lambda on these quantities and show these in tabular form for different compact stars 4U1820-30, HerX-1, SAXJ 1808.4-3658 and VelaX-12 with radii 10, 7.7, 7.07 and 9.99 respectively. We determine structure scalars with orthogonal splitting of the Riemann tensor and with the help of these scalars the complexity factor can be determined. Furthermore, we have checked some astrophysical sources for vanishing complexity factor.
引用
收藏
页数:9
相关论文
共 48 条
[1]   Complexity factor for anisotropic source in non-minimal coupling metric f(R) gravity [J].
Abbas, G. ;
Nazar, H. .
EUROPEAN PHYSICAL JOURNAL C, 2018, 78 (11)
[2]   Complexity factor for static anisotropic self-gravitating source in f (R) gravity [J].
Abbas, G. ;
Nazar, H. .
EUROPEAN PHYSICAL JOURNAL C, 2018, 78 (06)
[3]   STRANGE STARS [J].
ALCOCK, C ;
FARHI, E ;
OLINTO, A .
ASTROPHYSICAL JOURNAL, 1986, 310 (01) :261-272
[4]  
Alvarenga F. G., 2013, J MOD PHYS, V04, P130, DOI [DOI 10.4236/jmp.2013.41019, 10.4236/jmp.2013.41019, DOI 10.4236/JMP.2013.41019]
[5]   A Massive Pulsar in a Compact Relativistic Binary [J].
Antoniadis, John ;
Freire, Paulo C. C. ;
Wex, Norbert ;
Tauris, Thomas M. ;
Lynch, Ryan S. ;
van Kerkwijk, Marten H. ;
Kramer, Michael ;
Bassa, Cees ;
Dhillon, Vik S. ;
Driebe, Thomas ;
Hessels, Jason W. T. ;
Kaspi, Victoria M. ;
Kondratiev, Vladislav I. ;
Langer, Norbert ;
Marsh, Thomas R. ;
McLaughlin, Maura A. ;
Pennucci, Timothy T. ;
Ransom, Scott M. ;
Stairs, Ingrid H. ;
van Leeuwen, Joeri ;
Verbiest, Joris P. W. ;
Whelan, David G. .
SCIENCE, 2013, 340 (6131) :448
[6]  
Bel L., 1961, Ann. Inst. H Poincar, VVolume 17, P37
[7]   Accelerated expansion from a nonminimal gravitational coupling to matter [J].
Bertolami, O. ;
Frazao, P. ;
Paramos, J. .
PHYSICAL REVIEW D, 2010, 81 (10)
[8]   Extra force in f(R) modified theories of gravity [J].
Bertolami, Orfeu ;
Bohmer, Christian G. ;
Harko, Tiberiu ;
Lobo, Francisco S. N. .
PHYSICAL REVIEW D, 2007, 75 (10)
[9]   Evolution of compact stars and dark dynamical variables [J].
Bhatti, M. Z. ;
Yousaf, Z. ;
Ilyas, M. .
EUROPEAN PHYSICAL JOURNAL C, 2017, 77 (10)
[10]   Tendency towards maximum complexity in a nonequilibrium isolated system -: art. no. 066116 [J].
Calbet, X ;
López-Ruiz, R .
PHYSICAL REVIEW E, 2001, 63 (06)