Soft singularity crossing and transformation of matter properties
We investigate particular cosmological models, based either on tachyon fields or on perfect fluids, for which soft future singularities arise in a natural way. Our main result is the description of a smooth crossing of the soft singularity in models with an anti-Chaplygin gas or with a particular ta...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
American Physical Society
2013
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| Sorozat: | PHYSICAL REVIEW D
88 No. 2 |
| doi: | 10.1103/PhysRevD.88.023535 |
| mtmt: | 2407750 |
| Online Access: | http://publicatio.bibl.u-szeged.hu/8187 |
| LEADER | 01719nab a2200265 i 4500 | ||
|---|---|---|---|
| 001 | publ8187 | ||
| 005 | 20190404151249.0 | ||
| 008 | 161214s2013 hu o 0|| angol d | ||
| 022 | |a 1550-7998 | ||
| 024 | 7 | |a 10.1103/PhysRevD.88.023535 |2 doi | |
| 024 | 7 | |a 2407750 |2 mtmt | |
| 040 | |a SZTE Publicatio Repozitórium |b hun | ||
| 041 | |a angol | ||
| 100 | 1 | |a Keresztes Zoltán | |
| 245 | 1 | 0 | |a Soft singularity crossing and transformation of matter properties |h [elektronikus dokumentum] / |c Keresztes Zoltán |
| 260 | |a American Physical Society |c 2013 | ||
| 300 | |a Terjedelem: 12 p.-Azonosító: 023535 | ||
| 490 | 0 | |a PHYSICAL REVIEW D |v 88 No. 2 | |
| 520 | 3 | |a We investigate particular cosmological models, based either on tachyon fields or on perfect fluids, for which soft future singularities arise in a natural way. Our main result is the description of a smooth crossing of the soft singularity in models with an anti-Chaplygin gas or with a particular tachyon field in the presence of dust. Such a crossing is made possible by certain transformations of matter properties. Some of these cosmological evolutions involving tachyons are compatible with SNIa data. We compute numerically their dynamics involving a first soft singularity crossing, a turning point and a second soft singulatity crossing during recollapse, ending in a Big Crunch singularity. | |
| 700 | 0 | 1 | |a Gergely Árpád László |e aut |
| 700 | 0 | 1 | |a Kamenshchik Alexander Yu |e aut |
| 700 | 0 | 1 | |a Gorini Vittorio |e aut |
| 700 | 0 | 1 | |a Polarski David |e aut |
| 856 | 4 | 0 | |u http://publicatio.bibl.u-szeged.hu/8187/1/21_cikk_keresztes2013.pdf |z Dokumentum-elérés |
| 856 | 4 | 0 | |u http://publicatio.bibl.u-szeged.hu/8187/2/21_cikk_preprint_1304.6355v2.pdf |z Dokumentum-elérés |