Dark matter to dark energy transition in k-essence cosmologies
We implement the transition from dark matter to dark energy in k-essence cosmologies for a very large set of kinetic functions F, in a way alternative to recent proposals which use generalized Chaplygin gas and transient models. Here we require that the pressure admits a power-law expansion around s...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_02177323_v20_n27_p2075_Chimento |
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todo:paper_02177323_v20_n27_p2075_Chimento2023-10-03T15:10:22Z Dark matter to dark energy transition in k-essence cosmologies Chimento, L.P. Forte, M. Lazkoz, R. Dark energy Dark matter k-essence We implement the transition from dark matter to dark energy in k-essence cosmologies for a very large set of kinetic functions F, in a way alternative to recent proposals which use generalized Chaplygin gas and transient models. Here we require that the pressure admits a power-law expansion around some value of the kinetic energy where the pressure vanishes. In addition, for suitable values of the parameters of the model, the speed of sound of the dark matter will be low. We first present the discussion in fairly general terms, and later consider for illustration two examples. © World Scientific Publishing Company. Fil:Chimento, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Forte, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02177323_v20_n27_p2075_Chimento |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Dark energy Dark matter k-essence |
| spellingShingle |
Dark energy Dark matter k-essence Chimento, L.P. Forte, M. Lazkoz, R. Dark matter to dark energy transition in k-essence cosmologies |
| topic_facet |
Dark energy Dark matter k-essence |
| description |
We implement the transition from dark matter to dark energy in k-essence cosmologies for a very large set of kinetic functions F, in a way alternative to recent proposals which use generalized Chaplygin gas and transient models. Here we require that the pressure admits a power-law expansion around some value of the kinetic energy where the pressure vanishes. In addition, for suitable values of the parameters of the model, the speed of sound of the dark matter will be low. We first present the discussion in fairly general terms, and later consider for illustration two examples. © World Scientific Publishing Company. |
| format |
JOUR |
| author |
Chimento, L.P. Forte, M. Lazkoz, R. |
| author_facet |
Chimento, L.P. Forte, M. Lazkoz, R. |
| author_sort |
Chimento, L.P. |
| title |
Dark matter to dark energy transition in k-essence cosmologies |
| title_short |
Dark matter to dark energy transition in k-essence cosmologies |
| title_full |
Dark matter to dark energy transition in k-essence cosmologies |
| title_fullStr |
Dark matter to dark energy transition in k-essence cosmologies |
| title_full_unstemmed |
Dark matter to dark energy transition in k-essence cosmologies |
| title_sort |
dark matter to dark energy transition in k-essence cosmologies |
| url |
http://hdl.handle.net/20.500.12110/paper_02177323_v20_n27_p2075_Chimento |
| work_keys_str_mv |
AT chimentolp darkmattertodarkenergytransitioninkessencecosmologies AT fortem darkmattertodarkenergytransitioninkessencecosmologies AT lazkozr darkmattertodarkenergytransitioninkessencecosmologies |
| _version_ |
1782026890542841856 |