Anisotropic compact sphere with Van der Waals equation of state

被引:41
作者
Thirukkanesh, S. [1 ]
Ragel, F. C. [2 ]
机构
[1] Eastern Univ, Dept Math, Chenkalady, Sri Lanka
[2] Eastern Univ, Dept Phys, Chenkalady, Sri Lanka
关键词
Einstein field equations; Van der Waals EoS; Quark star; STRANGE STARS; MODEL; DECONFINEMENT; DENSITY;
D O I
10.1007/s10509-014-1883-1
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We formulate a system of field equations with Van der Waals type equation of state to the Einstein field equations in spherically symmetric static spacetime to describe anisotropic compact matter and obtain a new class of solution by choosing one of the gravitational potentials. The generated model is shown to be physically admissible by satisfying the major physical conditions such as regularity of gravitational potential at the origin, positive definiteness of energy density and the radial pressure at the origin, vanishing of radial pressure at some finite radius, and monotonic decrease of the energy density and the radial pressure with increasing radius. The model also satisfy the casuality condition and match smoothly with the Schwarzschild exterior line element at the stellar boundary. We believe that the solution found through this work may assist more detailed studies of relativistic compact stellar bodies at the extremes of densities.
引用
收藏
页码:415 / 420
页数:6
相关论文
共 28 条
[1]   COLLAPSED NUCLEI [J].
BODMER, AR .
PHYSICAL REVIEW D, 1971, 4 (06) :1601-&
[2]   ANISOTROPIC SPHERES IN GENERAL RELATIVITY [J].
BOWERS, RL ;
LIANG, EPT .
ASTROPHYSICAL JOURNAL, 1974, 188 (03) :657-665
[3]  
Burgio GF, 2002, PHYS REV C, V66, DOI 10.1103/PhysRevC.66.025802
[4]   DYNAMICAL INSTABILITY FOR RADIATING ANISOTROPIC COLLAPSE [J].
CHAN, R ;
HERRERA, L ;
SANTOS, NO .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1993, 265 (03) :533-544
[5]   NEW EXTENDED MODEL OF HADRONS [J].
CHODOS, A ;
JAFFE, RL ;
JOHNSON, K ;
THORN, CB ;
WEISSKOP.VF .
PHYSICAL REVIEW D, 1974, 9 (12) :3471-3495
[6]   Physical acceptability of isolated, static, spherically symmetric, perfect fluid solutions of Einstein's equations [J].
Delgaty, MSR ;
Lake, K .
COMPUTER PHYSICS COMMUNICATIONS, 1998, 115 (2-3) :395-415
[7]   A two-solar-mass neutron star measured using Shapiro delay [J].
Demorest, P. B. ;
Pennucci, T. ;
Ransom, S. M. ;
Roberts, M. S. E. ;
Hessels, J. W. T. .
NATURE, 2010, 467 (7319) :1081-1083
[8]   Strange stars with realistic quark vector interaction and phenomenological density-dependent scalar potential [J].
Dey, M ;
Bombaci, I ;
Dey, J ;
Ray, S ;
Samanta, BC .
PHYSICS LETTERS B, 1998, 438 (1-2) :123-128
[9]   Testing deconfinement at high isospin density [J].
Di Toro, M. ;
Drago, A. ;
Gaitanos, T. ;
Greco, V. ;
Lavagno, A. .
NUCLEAR PHYSICS A, 2006, 775 (1-2) :102-126
[10]   On the nature and evolution of the unique binary pulsar J1903+0327 [J].
Freire, P. C. C. ;
Bassa, C. G. ;
Wex, N. ;
Stairs, I. H. ;
Champion, D. J. ;
Ransom, S. M. ;
Lazarus, P. ;
Kaspi, V. M. ;
Hessels, J. W. T. ;
Kramer, M. ;
Cordes, J. M. ;
Verbiest, J. P. W. ;
Podsiadlowski, P. ;
Nice, D. J. ;
Deneva, J. S. ;
Lorimer, D. R. ;
Stappers, B. W. ;
McLaughlin, M. A. ;
Camilo, F. .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2011, 412 (04) :2763-2780