Kinetic coupled tachyon: A dynamical system analysis

被引：1
作者：
Pace, Francesco [1 ,2 ,3 ]
Rozas-Fernandez, Alberto [4 ]
Turker, Ozgen Tunc [5 ]
机构：
[1] Univ Torino, Dipartimento Fis, Via P Giuria 1, I-10125 Turin, Italy
[2] INFN, Sez Torino, Via P Giuria 1, I-10125 Turin, Italy
[3] INAF Ist Nazl Astrofis, Osservatorio Astrofis Torino, Str Osservatorio 20, I-10025 Pino Torinese, Italy
[4] Univ Lisbon, Inst Astrofis & Ciencias Espaco, OAL, PT-1349018 Lisbon, Portugal
[5] Univ Fed Espirito Santo, PPGCosmo, Ave Fernando Ferrari 514, BR-29075910 Vitoria, ES, Brazil
来源：
PHYSICS OF THE DARK UNIVERSE | 2025年 / 47卷
关键词：
Cosmology; Scalar field; Coupled tachyon; Dark energy; Phase-space analysis; COSMOLOGICAL CONSTANT; SCALAR FIELD; DARK-MATTER; ENERGY;
D O I：
10.1016/j.dark.2024.101786
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present and examine a kinetically coupled tachyon dark energy model, where a tachyon scalar field cp interacts with the matter sector. More specifically, we deduce this cosmological setting from a generalised interacting dark energy model that allows for the kinetic term of the scalar field to couple to the matter species a priori in the action. A thorough dynamical system analysis and its cosmological implications unveil the appearance of a scaling solution which is also an attractor of the system, thanks to a novel critical point, with a period of accelerated expansion thereafter. This new solution, not present in the uncoupled case, has the enticing consequence of alleviating the coincidence problem.
引用
收藏
页数：11
相关论文
共 70 条
  • [1] Cosmological dynamics of the tachyon with an inverse power-law potential
    Abramo, LR
    Finelli, F
    [J]. PHYSICS LETTERS B, 2003, 575 (3-4) : 165 - 171
  • [2] Planck 2015 results XIV. Dark energy and modified gravity
    Ade, P. A. R.
    Aghanim, N.
    Arnaud, M.
    Ashdown, M.
    Aumont, J.
    Baccigalupi, C.
    Banday, A. J.
    Barreiro, R. B.
    Bartolo, N.
    Battaner, E.
    Battye, R.
    Benabed, K.
    Benoit, A.
    Benoit-Levy, A.
    Bernard, J. -P.
    Bersanelli, M.
    Bielewicz, P.
    Bock, J. J.
    Bonaldi, A.
    Bonavera, L.
    Bond, J. R.
    Borrill, J.
    Bouchet, F. R.
    Bucher, M.
    Burigana, C.
    Butler, R. C.
    Calabrese, E.
    Cardoso, J. -F.
    Catalano, A.
    Challinor, A.
    Chamballu, A.
    Chiang, H. C.
    Christensen, P. R.
    Church, S.
    Clements, D. L.
    Colombi, S.
    Colombo, L. P. L.
    Combet, C.
    Couchot, F.
    Coulais, A.
    Crill, B. P.
    Curto, A.
    Cuttaia, F.
    Danese, L.
    Davies, R. D.
    Davis, R. J.
    de Bernardis, P.
    de Rosa, A.
    de Zotti, G.
    Delabrouille, J.
    [J]. ASTRONOMY & ASTROPHYSICS, 2016, 594
  • [3] Planck 2018 results: VIII. Gravitational lensing
    Aghanim, N.
    Akrami, Y.
    Ashdown, M.
    Aumont, J.
    Baccigalupi, C.
    Ballardini, M.
    Banday, A. J.
    Barreiro, R. B.
    Bartolo, N.
    Basak, S.
    Benabed, K.
    Bernard, J. -P.
    Bersanelli, M.
    Bielewicz, P.
    Bock, J. J.
    Bond, J. R.
    Borrill, J.
    Bouchet, F. R.
    Boulanger, F.
    Bucher, M.
    Burigana, C.
    Calabrese, E.
    Cardoso, J. -F.
    Carron, J.
    Challinor, A.
    Chiang, H. C.
    Colombo, L. P. L.
    Combet, C.
    Crill, B. P.
    Cuttaia, F.
    de Bernardis, P.
    de Zotti, G.
    Delabrouille, J.
    Di Valentino, E.
    Diego, J. M.
    Dore, O.
    Douspis, M.
    Ducout, A.
    Dupac, X.
    Efstathiou, G.
    Elsner, F.
    Ensslin, T. A.
    Eriksen, H. K.
    Fantaye, Y.
    Fernandez-Cobos, R.
    Finelli, F.
    Forastieri, F.
    Frailis, M.
    Fraisse, A. A.
    Franceschi, E.
    [J]. ASTRONOMY & ASTROPHYSICS, 2020, 641 (641)
  • [4] Tracking solutions in tachyon cosmology
    Aguirregabiria, JM
    Lazkoz, R
    [J]. PHYSICAL REVIEW D, 2004, 69 (12):
  • [5] Tachyon field non-minimally coupled to massive neutrino matter
    Ahmad, Safia
    Myrzakulov, Nurgissa
    Myrzakulov, R.
    [J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2016, (07):
  • [6] Stationary dark energy: The present universe as a global attractor
    Amendola, L
    Tocchini-Valentini, D
    [J]. PHYSICAL REVIEW D, 2001, 64 (04): : 5
  • [7] Amendola L., 2015, Dark Energy: Theory and Observations
  • [8] Solar System constraints on massless scalar-tensor gravity with positive coupling constant upon cosmological evolution of the scalar field
    Anderson, David
    Yunes, Nicolas
    [J]. PHYSICAL REVIEW D, 2017, 96 (06)
  • [9] Cosmological dynamics with nonlinear interactions
    Arevalo, Fabiola
    Bacalhau, Anna Paula
    Zimdahl, Winfried
    [J]. CLASSICAL AND QUANTUM GRAVITY, 2012, 29 (23)
  • [10] Armendariz-Picon C, 2001, PHYS REV D, V63, DOI 10.1103/PhysRevD.63.103510
1234567