Existence of traversable wormholes in the spherical stellar systems

被引:44
作者
Ovgun, A. [1 ]
Halilsoy, M. [1 ]
机构
[1] Eastern Mediterranean Univ, Dept Phys, Mersin 10, Famagusta, Turkey
关键词
Wormholes; Milky Way; Spherical stellar systems; Galaxies; Halos; Dark matter; DARK-MATTER HALOES; GALACTIC ROTATION CURVES; DENSITY; EINASTO; SIMULATIONS; PROFILES; PHYSICS; MODELS; IMPACT;
D O I
10.1007/s10509-016-2803-3
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Potentiality of the presence of traversable wormholes in the outer/inner regions of the halos of galaxies, situated on the Navarro-Frenk-White (NFW) density profile and Universal Rotation Curve (URC) dark matter models have been investigated recently (Rahaman et al. in Eur. Phys. J. C 74: 2750, 2014a; Rahaman et al. in Ann. Phys. 350: 561-567, 2014b; Kuhfittig in Eur. Phys. J. C 74: 2818, 2014a; Kuhfittig in Found. Phys. 7: 111-119, 2014b; Kuhfittig in Int. J. Mod. Phys. D 24(03): 1550023, 2015; Rahaman et al. in Astrophys. Space Sci. 361(1): 37, 2016a; Rahaman et al. in Astrophys. Space Sci. 361(3): 90, 2016b). Since this covers our own galaxy also as a possible home for traversable wormholes it prompts us to further the subject by considering alternative density distributions. From this token herein we make use of the Einasto model (Einasto in Tr. Inst. Astrofiz. Alma-Ata 5: 87, 1965; Einasto and Haud in Galaxy Astron. Astrophys. 223: 89, 1989; Merritt et al. in Astron. J. 132: 6, 2006) to describe the density profiles for the same purpose. Our choice for the latter is based on the fact that theoretical dark matter halos produced in computer simulations are best described by such a profile. For technical reasons we trim the number of parameters in the Einasto profile to a possible minimum. Based on such a model it is shown that traversable wormholes in the outer regions of spiral galaxies are possible while the inner part regions prohibit such formations.
引用
收藏
页数:9
相关论文
共 65 条
[51]   Possible existence of wormholes in the central regions of halos [J].
Rahaman, Farook ;
Salucci, P. ;
Kuhfittig, P. K. F. ;
Ray, Saibal ;
Rahaman, Mosiur .
ANNALS OF PHYSICS, 2014, 350 :561-567
[52]   Possible existence of wormholes in the galactic halo region [J].
Rahaman, Farook ;
Kuhfittig, P. K. F. ;
Ray, Saibal ;
Islam, Nasarul .
EUROPEAN PHYSICAL JOURNAL C, 2014, 74 (02) :1-7
[53]   Analytical properties of Einasto dark matter haloes [J].
Retana-Montenegro, E. ;
Van Hese, E. ;
Gentile, G. ;
Baes, M. ;
Frutos-Alfaro, F. .
ASTRONOMY & ASTROPHYSICS, 2012, 540
[54]   Cosmological simulations with self-interacting dark matter - I. Constant-density cores and substructure [J].
Rocha, Miguel ;
Peter, Annika H. G. ;
Bullock, James S. ;
Kaplinghat, Manoj ;
Garrison-Kimmel, Shea ;
Onorbe, Jose ;
Moustakas, Leonidas A. .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2013, 430 (01) :81-104
[55]   Theoretical dark matter halo density profile [J].
Salvador-Sole, Eduard ;
Vinas, Jordi ;
Manrique, Alberto ;
Serra, Sinue .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2012, 423 (03) :2190-2202
[56]   Dark matter massive fermions and Einasto profiles in galactic haloes [J].
Siutsou, I. ;
Argueelles, C. R. ;
Ruffini, R. .
ASTRONOMY REPORTS, 2015, 59 (07) :656-666
[57]  
Umetsu K., 2016, ARXIV150704385
[58]  
Vera R. C., 1970, ASTROPHYS J, V159, P379
[59]   Not too big, not too small: the dark haloes of the dwarf spheroidals in the Milky Way [J].
Vera-Ciro, Carlos A. ;
Helmi, Amina ;
Starkenburg, Else ;
Breddels, Maarten A. .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2013, 428 (02) :1696-1703
[60]   TRAVERSABLE WORMHOLES FROM SURGICALLY MODIFIED SCHWARZSCHILD SPACETIMES [J].
VISSER, M .
NUCLEAR PHYSICS B, 1989, 328 (01) :203-212