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Cosmic microwave background radiation temperature in a dissipative universe
http://hdl.handle.net/2297/43397
http://hdl.handle.net/2297/43397d553dec7-3737-4e83-bd1b-25af06faf781
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
TE-PR-KOMATSU-N-043507.pdf (614.3 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2017-10-03 | |||||
| タイトル | ||||||
| タイトル | Cosmic microwave background radiation temperature in a dissipative universe | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Komatsu, Nobuyoshi
× Komatsu, Nobuyoshi× Kimura, Shigeo |
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| 書誌情報 |
Physical Review D - Particles, Fields, Gravitation and Cosmology 巻 92, 号 4, p. 043507, 発行日 2015-08-06 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1550-7998 | |||||
| NCID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA00773624 | |||||
| DOI | ||||||
| 関連タイプ | isIdenticalTo | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1103/PhysRevD.92.043507 | |||||
| 出版者 | ||||||
| 出版者 | American Physical Society | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The relationship between the cosmic microwave background radiation temperature and the redshift, i.e., the T-z relation, is examined in a phenomenological dissipative model. The model contains two constant terms, as if a nonzero cosmological constant Λ and a dissipative process are operative in a homogeneous, isotropic, and spatially flat universe. The T-z relation is derived from a general radiative temperature law, as appropriate for describing nonequilibrium states in a creation of cold dark matter model. Using this relation, the radiation temperature in the late Universe is calculated as a function of a dissipation rate ranging from μ=0, corresponding to a nondissipative lambda cold dark matter model, to μ=1, corresponding to a fully dissipative creation of cold dark matter model. The T-z relation for μ=0 is linear for standard cosmology and is consistent with observations. However, with increasing dissipation rate μ, the radiation temperature gradually deviates from a linear law because the effective equation-of-state parameter varies with time. When the background evolution of the Universe agrees with a fine-tuned pure lambda cold dark matter model, the T-z relation for low μ matches observations, whereas the T-z relation for high μ does not. Previous work also found that a weakly dissipative model accords with measurements of a growth rate for clustering related to structure formations. These results imply that low dissipation is likely for the Universe. The weakly dissipative model should be further constrained by recent observations. © 2015 American Physical Society. | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
