WEKO3
アイテム
The evolution of the diffuse cosmic ultraviolet background constrained by Hubble Space Telescope observations of 3C 273
https://ir.soken.ac.jp/records/3497
https://ir.soken.ac.jp/records/349787cbff17-e870-4c99-a257-b192cab7399b
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
nph-iarticle_query381 (111.4 kB)
|
.png)
|
| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2013-04-23 | |||||||||
| タイトル | ||||||||||
| タイトル | The evolution of the diffuse cosmic ultraviolet background constrained by Hubble Space Telescope observations of 3C 273 | |||||||||
| タイトル | ||||||||||
| タイトル | The evolution of the diffuse cosmic ultraviolet background constrained by Hubble Space Telescope observations of 3C 273 | |||||||||
| 言語 | en | |||||||||
| 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 |
IKEUCHI, Satoru
× IKEUCHI, Satoru
× TURNER, Edwin L
|
|||||||||
| 著者別名 |
池内, 了
× 池内, 了
|
|||||||||
| 抄録 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | Recent Hubble Space Telescope UV spectroscopy of 3C 273 has revealed more low-redshift Lyman-α absorption lines (IGM clouds) than expected from the extrapolation from high-redshift (z ≥ 1.6) observations. On the basis of the standard pressure confined cloud model of the Lyman-α forest, we show that this result indicates a sharp drop in the diffuse cosmic UV background from z = 2 to z = 0. If we fit a simple power law in 1 + z, the UV background flux must evolve as (1 + z) 2,7±1. Applying this conclusion to a simple model for a photoionized diffuse component of the IGM, we predict that the H I optical depth (Gunn-Peterson effect) will also only drop slowly or perhaps even increase with decreasing redshift at z < 2. The implied constraints on the density and pressure of the diffuse IGM at z = 0 are also derived. We note that the inferred evolution of the diffuse UV flux bears a striking, and perhaps not coincidental, resemblance to the most recent direct determinations of the volume emissivity of the quasar population. Finally, we point out that information on the evolution of the UV flux carries interesting consequences for other cosmological issues such as galaxy formation; in particular, it seems to mitigate somewhat against relatively recent galaxy formation. | |||||||||
| 書誌情報 |
Astrophysical Journal Letters en : Astrophysical Journal Letters 巻 381, 号 Issue 1 PART 2, p. L1-L4, 発行日 1991-11 |
|||||||||
| 出版者 | ||||||||||
| 出版者 | The American Astronomical Society | |||||||||
| ISSN | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 20418205 | |||||||||
| DOI | ||||||||||
| 関連タイプ | isIdenticalTo | |||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | http://doi.org/10.1086/186182 | |||||||||
| 関連名称 | 10.1086/186182 | |||||||||
| 権利 | ||||||||||
| 権利情報 | © 1991. American Astronomical Society. | |||||||||
| 関連サイト | ||||||||||
| 識別子タイプ | URI | |||||||||
| 関連識別子 | http://aas.org/publications/aas-copyright-policy | |||||||||
| 関連名称 | Copyright | |||||||||
| フォーマット | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | application/pdf | |||||||||
| 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 | |||||||||
