HERA Phase I Limits on the Cosmic 21 cm Signal: Constraints on Astrophysics and Cosmology during the Epoch of Reionization

被引：84

作者：

Abdurashidova, Zara ^{[1
]}

Aguirre, James E. ^{[2
]}

Alexander, Paul ^{[3
]}

Ali, Zaki S. ^{[1
]}

Balfour, Yanga ^{[4
]}

Barkana, Rennan ^{[5
]}

Beardsley, Adam P. ^{[6
,7
]}

Bernardi, Gianni ^{[4
,8
,9
]}

Billings, Tashalee S. ^{[2
]}

Bowman, Judd D. ^{[7
]}

Bradley, Richard F. ^{[10
]}

Bull, Philip ^{[11
]}

Burba, Jacob ^{[12
]}

Carey, Steve ^{[3
]}

Carilli, Chris L. ^{[13
]}

Cheng, Carina ^{[1
]}

DeBoer, David R. ^{[1
]}

Dexter, Matt ^{[1
]}

Acedo, Eloy de Lera ^{[3
]}

Dillon, Joshua S. ^{[1
]}

Ely, John ^{[3
]}

Ewall-Wice, Aaron ^{[1
]}

Fagnoni, Nicolas ^{[3
]}

Fialkov, Anastasia ^{[14
,15
]}

Fritz, Randall ^{[4
]}

Furlanetto, Steven R. ^{[16
]}

Gale-Sides, Kingsley ^{[3
]}

Glendenning, Brian ^{[13
]}

Gorthi, Deepthi ^{[1
]}

Greig, Bradley ^{[17
,18
]}

Grobbelaar, Jasper ^{[4
]}

Halday, Ziyaad ^{[4
]}

Hazelton, Bryna J. ^{[19
,20
]}

Heimersheim, Stefan ^{[14
]}

Hewitt, Jacqueline N. ^{[21
]}

Hickish, Jack ^{[1
]}

Jacobs, Daniel C. ^{[7
]}

Julius, Austin ^{[4
]}

Kern, Nicholas S. ^{[21
]}

Kerrigan, Joshua ^{[12
]}

Kittiwisit, Piyanat ^{[22
]}

Kohn, Saul A. ^{[2
]}

Kolopanis, Matthew ^{[7
]}

Lanman, Adam ^{[12
]}

La Plante, Paul ^{[2
]}

Lekalake, Telalo ^{[4
]}

Lewis, David ^{[7
]}

Liu, Adrian ^{[1
,23
,24
]}

Yin-Zhe Ma ^{[22
,25
]}

MacMahon, David ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA

[2] Univ Penn, Dept Phys & Astron, Philadelphia, PA USA

[3] Univ Cambridge, Cavendish Astrophys, Cambridge, MA USA

[4] South African Radio Observ SARAO, 2 Fir St, ZA-7925 Cape Town, South Africa

[5] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[6] Winona State Univ, Dept Phys, Winona, MN USA

[7] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ USA

[8] Rhodes Univ, Dept Phys & Elect, POB 94, ZA-6140 Grahamstown, South Africa

[9] INAF Ist Radioastron, Via Gobetti 101, I-40129 Bologna, Italy

[10] Natl Radio Astron Observ, Charlottesville, VA USA

[11] Queen Mary Univ London, Sch Phys & Astron, London, England

[12] Brown Univ, Dept Phys, Providence, RI 02912 USA

[13] Natl Radio Astron Observ, Socorro, NM 87801 USA

[14] Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

[15] Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England

[16] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA USA

[17] Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia

[18] ARC Ctr Excellence All Sky Astrophys 3 Dimens AST, Sydney, NSW, Australia

[19] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[20] Univ Washington, eSci Inst, Seattle, WA USA

[21] MIT, Dept Phys, Cambridge, MA 02139 USA

[22] Univ KwaZulu Natal, Sch Chem & Phys, Westville Campus,Private Bag X54001, ZA-4000 Durban, South Africa

[23] McGill Univ, Dept Phys, 3600 Univ St, Montreal, PQ H3A 2T8, Canada

[24] McGill Univ, McGill Space Inst, 3600 Univ St, Montreal, PQ H3A 2T8, Canada

[25] Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr NUCAC, ZA-4000 Durban, South Africa

[26] Scuola Normale Super Pisa, I-56126 Pisa, PI, Italy

[27] Harvard & Smithsonian, Ctr Astrophys, Cambridge, MA 02138 USA

[28] Univ Western Cape, Dept Phys & Astron, ZA-7535 Cape Town, South Africa

[29] CSIRO, Space & Astron, POB 1130, Bentley, WA 6102, Australia

[30] Amer Astron Soc, Washington, DC USA

来源：

ASTROPHYSICAL JOURNAL | 2022年 / 924卷 / 02期

基金：

欧洲研究理事会; 新加坡国家研究基金会; 澳大利亚研究理事会; 加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

GLOBAL 21-CM SIGNAL; STAR-FORMATION RATE; APPROXIMATE-TO; 9.1; X-RAY-EMISSION; LY-ALPHA; LYMAN-ALPHA; INTERGALACTIC MEDIUM; POWER SPECTRUM; DARK-MATTER; GALAXY FORMATION;

D O I：

10.3847/1538-4357/ac2ffc

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recently, the Hydrogen Epoch of Reionization Array (HERA) has produced the experiment's first upper limits on the power spectrum of 21 cm fluctuations at z similar to 8 and 10. Here, we use several independent theoretical models to infer constraints on the intergalactic medium (IGM) and galaxies during the epoch of reionization from these limits. We find that the IGM must have been heated above the adiabatic-cooling threshold by z similar to 8, independent of uncertainties about IGM ionization and the radio background. Combining HERA limits with complementary observations constrains the spin temperature of the z similar to 8 neutral IGM to 27 K <(T) over bar (S)> 630 K (2.3 K <(T) over bar (S)> 640 K) at 68% (95%) confidence. They therefore also place a lower bound on X-ray heating, a previously unconstrained aspects of early galaxies. For example, if the cosmic microwave background dominates the z similar to 8 radio background, the new HERA limits imply that the first galaxies produced X-rays more efficiently than local ones. The z similar to 10 limits require even earlier heating if dark-matter interactions cool the hydrogen gas. If an extra radio background is produced by galaxies, we rule out (at 95% confidence) the combination of high radio and low X-ray luminosities of L-r,L-nu/SFR > 4 x 10(24) W Hz(-1) M-circle dot(-1) yr and L-X/SFR < 7.6 x 10(39) erg s(-1) M-circle dot(-1) yr. The new HERA upper limits neither support nor disfavor a cosmological interpretation of the recent Experiment to Detect the Global EOR Signature (EDGES) measurement. The framework described here provides a foundation for the interpretation of future HERA results.

引用

页数：30

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