A luminous quasar at a redshift of z=7.085

被引：1248

作者：

Mortlock, Daniel J. ^{[1
]}

Warren, Stephen J. ^{[1
]}

Venemans, Bram P. ^{[2
]}

Patel, Mitesh ^{[1
]}

Hewett, Paul C. ^{[3
]}

McMahon, Richard G. ^{[3
]}

Simpson, Chris ^{[4
]}

Theuns, Tom ^{[5
,6
]}

Gonzales-Solares, Eduardo A. ^{[3
]}

Adamson, Andy ^{[7
]}

Dye, Simon ^{[8
]}

Hambly, Nigel C. ^{[9
]}

Hirst, Paul ^{[10
]}

Irwin, Mike J. ^{[3
]}

Kuiper, Ernst ^{[11
]}

Lawrence, Andy ^{[9
]}

Rottgering, Huub J. A. ^{[11
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2AZ, England

[2] European So Observ, D-85748 Garching, Germany

[3] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[4] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England

[5] Univ Durham, Inst Computat Cosmol, Dept Phys, Durham DH1 3LE, England

[6] Univ Antwerp, B-2020 Antwerp, Belgium

[7] Joint Astron Ctr, Hilo, HI 96720 USA

[8] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

[9] Univ Edinburgh, SUPA, Inst Astron, Royal Observ, Edinburgh EH9 3HJ, Midlothian, Scotland

[10] Gemini Observ, Hilo, HI 96720 USA

[11] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands

来源：

NATURE | 2011年 / 474卷 / 7353期

关键词：

DIGITAL SKY SURVEY; NEUTRAL HYDROGEN; BLACK-HOLES; Z-GREATER-THAN-6; REIONIZATION; Z-SIMILAR-TO-6; IONIZATION; DISCOVERY; EMISSION; UNIVERSE;

D O I：

10.1038/nature10159

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The intergalactic medium was not completely reionized until approximately a billion years after the Big Bang, as revealed(1) by observations of quasars with redshifts of less than 6.5. It has been difficult to probe to higher redshifts, however, because quasars have historically been identified(2-4) in optical surveys, which are insensitive to sources at redshifts exceeding 6.5. Here we report observations of a quasar (ULASJ112001.48+064124.3) at a redshift of 7.085, which is 0.77 billion years after the Big Bang. ULASJ1120+0641 has a luminosity of 6.3 x 10(13)L(circle dot) and hosts a black hole with a mass of 2 x 10(9)M(circle dot) (where L(circle dot) and M(circle dot) are the luminosity and mass of the Sun). The measured radius of the ionized near zone around ULASJ1120+0641 is 1.9 megaparsecs, a factor of three smaller than is typical for quasars at redshifts between 6.0 and 6.4. The near-zone transmission profile is consistent with a Ly alpha d damping wing(5), suggesting that the neutral fraction of the intergalactic medium in front of ULASJ1120+0641 exceeded 0.1.

引用

页码：616 / 619

页数：4

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