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DOI | 10.1126/science.aaf9346 |
Measurement of the small-scale structure of the intergalactic medium using close quasar pairs | |
Rorai, Alberto1,2; Hennawi, Joseph F.2,3; Onorbe, Jose2; White, Martin4,5; Prochaska, J. Xavier6; Kulkarni, Girish1,2; Walther, Michael2; Lukic, Zarija5; Lee, Khee-Gan | |
2017-04-28 | |
发表期刊 | SCIENCE
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ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2017 |
卷号 | 356期号:6336页码:418-421 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Germany; USA |
英文摘要 | The distribution of diffuse gas in the intergalactic medium (IGM) imprints a series of hydrogen absorption lines on the spectra of distant background quasars known as the Lyman-alpha forest. Cosmological hydrodynamical simulations predict that IGM density fluctuations are suppressed below a characteristic scale where thermal pressure balances gravity. We measured this pressure-smoothing scale by quantifying absorption correlations in a sample of close quasar pairs. We compared our measurements to hydrodynamical simulations, where pressure smoothing is determined by the integrated thermal history of the IGM. Our findings are consistent with standard models for photoionization heating by the ultraviolet radiation backgrounds that reionized the universe. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000400143000049 |
WOS关键词 | LY-ALPHA FOREST ; EQUATION-OF-STATE ; POWER SPECTRUM ; PRESSURE SUPPORT ; SYNTHESIS MODELS ; MAGNETIC-FIELDS ; BINARY QUASARS ; DENSITY ; CONSTRAINTS ; TEMPERATURE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/195935 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Inst Astron, Cambridge, England; 2.Max Planck Inst Astron, Konigstuhl, Germany; 3.Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA; 4.Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA; 5.Lawrence Berkeley Natl Lab, Berkeley, CA USA; 6.Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA |
推荐引用方式 GB/T 7714 | Rorai, Alberto,Hennawi, Joseph F.,Onorbe, Jose,et al. Measurement of the small-scale structure of the intergalactic medium using close quasar pairs[J]. SCIENCE,2017,356(6336):418-421. |
APA | Rorai, Alberto.,Hennawi, Joseph F..,Onorbe, Jose.,White, Martin.,Prochaska, J. Xavier.,...&Lee, Khee-Gan.(2017).Measurement of the small-scale structure of the intergalactic medium using close quasar pairs.SCIENCE,356(6336),418-421. |
MLA | Rorai, Alberto,et al."Measurement of the small-scale structure of the intergalactic medium using close quasar pairs".SCIENCE 356.6336(2017):418-421. |
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