Beacons into the Cosmic Dark Ages: Boosted Transmission of Lyα from UV Bright Galaxies at z ≳ 7

被引：78

作者：

Mason, Charlotte A. ^{[1
]}

Treu, Tommaso ^{[1
]}

de Barros, Stephane ^{[2
,3
]}

Dijkstra, Mark ^{[4
]}

Fontana, Adriano ^{[5
]}

Mesinger, Andrei ^{[6
]}

Pentericci, Laura ^{[5
]}

Trenti, Michele ^{[7
,8
]}

Vanzella, Eros ^{[3
]}

机构：

[1] UCLA, Dept Phys & Astron, Los Angeles, CA 90095 USA

[2] Univ Geneva, Observ Geneve, 51 Ch Maillettes, CH-1290 Versoix, Switzerland

[3] INAF Osservatorio Astron Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy

[4] Univ Oslo, Inst Theoret Astrophys, POB 1029, NO-0315 Oslo, Norway

[5] INAF Osservatorio Astron Roma, Via Frascati 33, I-00040 Monte Porzio Catone, RM, Italy

[6] Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy

[7] Univ Melbourne, Sch Phys, Parkville, Vic, Australia

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

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2018年 / 857卷 / 02期

基金：

欧洲研究理事会; 澳大利亚研究理事会;

关键词：

dark ages; reionization; first stars; galaxies: evolution; galaxies: high-redshift; intergalactic medium; LYMAN-BREAK GALAXIES; REIONIZATION; EMISSION; LUMINOSITY; FRACTION; CONSTRAINTS; EVOLUTION; I;

D O I：

10.3847/2041-8213/aabbab

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recent detections of Lyman alpha (Ly alpha) emission from z > 7.5 galaxies were somewhat unexpected given a dearth of previous non-detections in this era when the intergalactic medium (IGM) is still highly neutral. But these detections were from UV bright galaxies, which preferentially live in overdensities that reionize early, and have significantly Doppler-shifted Ly alpha line profiles emerging from their interstellar media (ISM), making them less affected by the global IGM state. Using a combination of reionization simulations and empirical ISM models we show, as a result of these two effects, that UV bright galaxies in overdensities have >2x higher transmission through the z similar to 7 IGM than typical field galaxies, and that this boosted transmission is enhanced as the neutral fraction increases. The boosted transmission is not sufficient to explain the observed high Ly alpha fraction of M-UV less than or similar to -22 galaxies, suggesting that Ly alpha emitted by these galaxies must be stronger than expected due to enhanced production and/or selection effects. Despite the bias of UV bright galaxies to reside in overdensities we show Ly alpha observations of such galaxies can accurately measure the global neutral hydrogen fraction, particularly when Ly alpha from UV faint galaxies is extinguished, making them ideal candidates for spectroscopic follow-up into the cosmic Dark Ages.

引用

页数：6

共 43 条

[1] An 800-million-solar-mass black hole in a significantly neutral Universe at a redshift of 7.5 [J].

Banados, Eduardo ;

Venemans, Bram P. ;

Mazzucchelli, Chiara ;

Farina, Emanuele P. ;

Walter, Fabian ;

Wang, Feige ;

Decarli, Roberto ;

Stern, Daniel ;

Fan, Xiaohui ;

Davies, Frederick B. ;

Hennawi, Joseph F. ;

Simcoe, Robert A. ;

Turner, Monica L. ;

Rix, Hans-Walter ;

Yang, Jinyi ;

Kelson, Daniel D. ;

Rudie, Gwen C. ;

Winters, Jan Martin .

NATURE, 2018, 553 (7689) :473-+

[2] MEASUREMENT OF GALAXY CLUSTERING AT z ∼ 7.2 AND THE EVOLUTION OF GALAXY BIAS FROM 3.8 < z < 8 IN THE XDF, GOODS-S, AND GOODS-N [J].

Barone-Nugent, R. L. ;

Trenti, M. ;

Wyithe, J. S. B. ;

Bouwens, R. J. ;

Oesch, P. A. ;

Illingworth, G. D. ;

Carollo, C. M. ;

Su, J. ;

Stiavelli, M. ;

Labbe, I. ;

van Dokkum, P. G. .

ASTROPHYSICAL JOURNAL, 2014, 793 (01)

[3] The galaxy luminosity function at z ≃ 6 and evidence for rapid evolution in the bright end from z ≃ 7 to 5 [J].

Bowler, R. A. A. ;

Dunlop, J. S. ;

McLure, R. J. ;

McCracken, H. J. ;

Milvang-Jensen, B. ;

Furusawa, H. ;

Taniguchi, Y. ;

Le Fevre, O. ;

Fynbo, J. P. U. ;

Jarvis, M. J. ;

Haeussler, B. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2015, 452 (02) :1817-1840

[4] The VIMOS Ultra-Deep Survey (VUDS): fast increase in the fraction of strong Lyman-α emitters from z=2 to z=6 [J].

Cassata, P. ;

Tasca, L. A. M. ;

Le Fevre, O. ;

Lemaux, B. C. ;

Garilli, B. ;

Le Brun, V. ;

Maccagni, D. ;

Pentericci, L. ;

Thomas, R. ;

Vanzella, E. ;

Zamorani, G. ;

Zucca, E. ;

Amorin, R. ;

Bardelli, S. ;

Capak, P. ;

Cassara, L. P. ;

Castellano, M. ;

Cimatti, A. ;

Cuby, J. G. ;

Cucciati, O. ;

de la Torre, S. ;

Durkalec, A. ;

Fontana, A. ;

Giavalisco, M. ;

Grazian, A. ;

Hathi, N. P. ;

Ilbert, O. ;

Moreau, C. ;

Paltani, S. ;

Ribeiro, B. ;

Salvato, M. ;

Schaerer, D. ;

Scodeggio, M. ;

Sommariva, V. ;

Talia, M. ;

Taniguchi, Y. ;

Tresse, L. ;

Vergani, D. ;

Wang, P. W. ;

Charlot, S. ;

Contini, T. ;

Fotopoulou, S. ;

Koekemoer, A. M. ;

Lopez-Sanjuan, C. ;

Mellier, Y. ;

Scoville, N. .

ASTRONOMY & ASTROPHYSICS, 2015, 573

[5] FIRST OBSERVATIONAL SUPPORT FOR OVERLAPPING REIONIZED BUBBLES GENERATED BY A GALAXY OVERDENSITY [J].

Castellano, M. ;

Dayal, P. ;

Pentericci, L. ;

Fontana, A. ;

Hutter, A. ;

Brammer, G. ;

Merlin, E. ;

Grazian, A. ;

Pilo, S. ;

Amorin, R. ;

Cristiani, S. ;

Dickinson, M. ;

Ferrara, A. ;

Gallerani, S. ;

Giallongo, E. ;

Giavalisco, M. ;

Guaita, L. ;

Koekemoer, A. ;

Maiolino, R. ;

Paris, D. ;

Santini, P. ;

Vallini, L. ;

Vanzella, E. ;

Wagg, J. .

ASTROPHYSICAL JOURNAL LETTERS, 2016, 818 (01)

[6] A remarkably high fraction of strong Lyα emitters amongst luminous redshift 6.0 < z < 6.5 Lyman-break galaxies in the UKIDSS Ultra-Deep Survey [J].

Curtis-Lake, E. ;

McLure, R. J. ;

Pearce, H. J. ;

Dunlop, J. S. ;

Cirasuolo, M. ;

Stark, D. P. ;

Almaini, O. ;

Bradshaw, E. J. ;

Chuter, R. ;

Foucaud, S. ;

Hartley, W. G. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2012, 422 (02) :1425-1435

[7] VLT/FORS2 view at z ∼ 6: Lyman-α emitter fraction and galaxy physical properties at the edge of the epoch of cosmic reionization [J].

De Barros, S. ;

Pentericci, L. ;

Vanzella, E. ;

Castellano, M. ;

Fontana, A. ;

Grazian, A. ;

Conselice, C. J. ;

Yan, H. ;

Koekemoer, A. ;

Cristiani, S. ;

Dickinson, M. ;

Finkelstein, S. L. ;

Maiolino, R. .

ASTRONOMY & ASTROPHYSICS, 2017, 608

[8] Lyα Emitting Galaxies as a Probe of Reionisation [J].

Dijkstra, Mark .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA, 2014, 31

[9] The detectability of Lyα emission from galaxies during the epoch of reionization [J].

Dijkstra, Mark ;

Mesinger, Andrei ;

Wyithe, J. Stuart B. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2011, 414 (03) :2139-2147

[10] A galaxy rapidly forming stars 700 million years after the Big Bang at redshift 7.51 [J].

Finkelstein, S. L. ;

Papovich, C. ;

Dickinson, M. ;

Song, M. ;

Tilvi, V. ;

Koekemoer, A. M. ;

Finkelstein, K. D. ;

Mobasher, B. ;

Ferguson, H. C. ;

Giavalisco, M. ;

Reddy, N. ;

Ashby, M. L. N. ;

Dekel, A. ;

Fazio, G. G. ;

Fontana, A. ;

Grogin, N. A. ;

Huang, J. -S. ;

Kocevski, D. ;

Rafelski, M. ;

Weiner, B. J. ;

Willner, S. P. .

NATURE, 2013, 502 (7472) :524-527

← 1 2 3 4 5 →