| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
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|
タイトル |
The reionization history and early metal enrichment inferred from the gamma-ray burst rate |
|
言語 |
en |
| 作成者 |
Murakami, T.
Yonetoku, M.
Umemura, M.
Matsubayashi, T.
Yamazaki, Ryo
|
| アクセス権 |
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|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
|
|
権利情報 |
Copyright (c) 2005 The American Astronomical Society |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
early universe |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
gamma ryas |
| 主題 |
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|
主題Scheme |
Other |
|
主題 |
bursts |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
stars |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
formation |
| 主題 |
|
|
主題Scheme |
NDC |
|
主題 |
440 |
| 内容記述 |
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|
内容記述 |
Based on the gamma-ray burst event rate at redshifts of 4 ≤ z ≤ 12 which is assessed by the spectral peak energy-to-luminosity relation recently found by Yonetoku et al., we observationally derive the star formation (SFR) for Population III (Pop. III) stars in a high-redshift universe. As a result, we find that Pop. III stars form continuously at. Using the derived Pop. III SFR, we attempt to estimate the ultraviolet (UV) photon emission rate at in which redshift range no observational information has been hitherto 7 ≤ z ≤ 12 on ionizing radiation intensity. We find that the UV emissivity at can make a noticeable 7 ≤ z ≤ 12 to the early reionization. The maximal emissivity is higher than the level required to keep ionizing the matter (IGM) at. However, if the escape fraction of ionizing photons from Pop. III objects is 7 ≤ z ≤ 12 than 10%, then the IGM can be neutralized at some redshift, which may lead to the double reionization. As the enrichment, the ejection of all metals synthesized in Pop. III objects is marginally consistent with the metallicity, although the confinement of metals in Pop. III objects can reduce the enrichment significantly. |
|
言語 |
en |
| 出版者 |
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|
出版者 |
University of Chicago Press |
| 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 |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
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|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1086/430828 |
| 関連情報 |
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|
関連タイプ |
isVersionOf |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
http://dx.doi.org/10.1086/430828 |
| 開始ページ |
|
|
開始ページ |
L13 |
| 書誌情報 |
Astrophysical Journal
Astrophysical Journal
巻 625,
号 1,
p. L13-L16,
発行日 2005-05
|
| 旧ID |
14647 |
AstrophysJLet_625_L13.pdf (139.4 KB)
