WMAP and the generalized Chaplygin gas
We compare the WMAP temperature power spectrum and SNIa data to models with a generalized Chaplygin gas as dark energy. The generalized Chaplygin gas is a component with an exotic equation of state, p_X=-A/\rho^\alpha_X (a polytropic gas with negative constant and exponent). Our main result is that,...
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Dokumenttyp: | Article (Journal) Kapitel/Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
2003
|
| In: |
Arxiv
|
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://arxiv.org/abs/astro-ph/0304325
|
| Verfasserangaben: | L. Amendola, F. Finelli, C. Burigana, and D. Carturan |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1565449452 | ||
| 003 | DE-627 | ||
| 005 | 20220814023653.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 171117s2003 xx |||||o 00| ||eng c | ||
| 035 | |a (DE-627)1565449452 | ||
| 035 | |a (DE-576)495449458 | ||
| 035 | |a (DE-599)BSZ495449458 | ||
| 035 | |a (OCoLC)1340982216 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Amendola, Luca |d 1963- |e VerfasserIn |0 (DE-588)1029171270 |0 (DE-627)732547482 |0 (DE-576)377045128 |4 aut | |
| 245 | 1 | 0 | |a WMAP and the generalized Chaplygin gas |c L. Amendola, F. Finelli, C. Burigana, and D. Carturan |
| 264 | 1 | |c 2003 | |
| 300 | |a 10 | ||
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Gesehen am 17.11.2017 | ||
| 520 | |a We compare the WMAP temperature power spectrum and SNIa data to models with a generalized Chaplygin gas as dark energy. The generalized Chaplygin gas is a component with an exotic equation of state, p_X=-A/\rho^\alpha_X (a polytropic gas with negative constant and exponent). Our main result is that, restricting to a flat universe and to adiabatic pressure perturbations for the generalized Chaplygin gas, the constraints at 95% CL to the present equation of state w_X = p_X / \rho_X and to the parameter \alpha are -1\leq w_X < -0.8, 0 \leq \alpha <0.2, respectively. Moreover, we show that a Chaplygin gas (\alpha =1) as a candidate for dark energy is ruled out by our analysis at more than the 99.99% CL. A generalized Chaplygin gas as a unified dark matter candidate (\Omega_{CDM}=0) appears much less likely than as a dark energy model, although its \chi^2 is only two sigma away from the expected value. | ||
| 650 | 4 | |a High Energy Physics - Phenomenology | |
| 650 | 4 | |a General Relativity and Quantum Cosmology | |
| 650 | 4 | |a Astrophysics | |
| 773 | 0 | 8 | |i Enthalten in |t Arxiv |d Ithaca, NY : Cornell University, 1991 |g (2003) Artikel-Nummer 0304325, 10 Seiten |h Online-Ressource |w (DE-627)509006531 |w (DE-600)2225896-6 |w (DE-576)28130436X |7 nnas |a WMAP and the generalized Chaplygin gas |
| 773 | 1 | 8 | |g year:2003 |g extent:10 |a WMAP and the generalized Chaplygin gas |
| 856 | 4 | 0 | |u http://arxiv.org/abs/astro-ph/0304325 |x Verlag |z kostenfrei |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20171117 | ||
| 993 | |a Article | ||
| 998 | |g 1029171270 |a Amendola, Luca |m 1029171270:Amendola, Luca |p 1 |x j | ||
| 999 | |a KXP-PPN1565449452 |e 2987398557 | ||
| BIB | |a Y | ||
| JSO | |a {"origin":[{"dateIssuedDisp":"2003","dateIssuedKey":"2003"}],"note":["Gesehen am 17.11.2017"],"name":{"displayForm":["L. Amendola, F. Finelli, C. Burigana, and D. Carturan"]},"recId":"1565449452","title":[{"title":"WMAP and the generalized Chaplygin gas","title_sort":"WMAP and the generalized Chaplygin gas"}],"relHost":[{"note":["Gesehen am 28.05.2024"],"disp":"WMAP and the generalized Chaplygin gasArxiv","physDesc":[{"extent":"Online-Ressource"}],"title":[{"title":"Arxiv","title_sort":"Arxiv"}],"language":["eng"],"origin":[{"publisher":"Cornell University ; Arxiv.org","dateIssuedDisp":"1991-","publisherPlace":"Ithaca, NY ; [Erscheinungsort nicht ermittelbar]","dateIssuedKey":"1991"}],"titleAlt":[{"title":"Arxiv.org"},{"title":"Arxiv.org e-print archive"},{"title":"Arxiv e-print archive"},{"title":"De.arxiv.org"}],"recId":"509006531","id":{"eki":["509006531"],"zdb":["2225896-6"]},"type":{"bibl":"edited-book","media":"Online-Ressource"},"pubHistory":["1991 -"],"part":{"text":"(2003) Artikel-Nummer 0304325, 10 Seiten","year":"2003","extent":"10"}}],"physDesc":[{"extent":"10 S."}],"type":{"media":"Online-Ressource","bibl":"chapter"},"id":{"eki":["1565449452"]},"person":[{"role":"aut","display":"Amendola, Luca","given":"Luca","family":"Amendola"}],"language":["eng"]} | ||
| SRT | |a AMENDOLALUWMAPANDTHE2003 | ||