The VANDELS survey: a measurement of the average Lyman-continuum escape fraction of star-forming galaxies at z=3.5

被引：37

作者：

Begley, R. ^{[1
]}

Cullen, F. ^{[1
]}

McLure, R. J. ^{[1
]}

Dunlop, J. S. ^{[1
]}

Hall, A. ^{[1
]}

Carnall, A. C. ^{[1
]}

Hamadouche, M. L. ^{[1
]}

McLeod, D. J. ^{[1
]}

Amorin, R. ^{[2
,3
]}

Calabro, A. ^{[4
]}

Fontana, A. ^{[4
]}

Fynbo, J. P. U. ^{[5
]}

Guaita, L. ^{[4
,6
]}

Hathi, N. P. ^{[7
]}

Hibon, P. ^{[8
]}

Ji, Z. ^{[9
]}

Llerena, M. ^{[3
]}

Pentericci, L. ^{[4
]}

Saldana-Lopez, A. ^{[10
]}

Schaerer, D. ^{[10
]}

Talia, M. ^{[11
,12
]}

Vanzella, E. ^{[13
]}

Zamorani, G. ^{[13
]}

机构：

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

[2] Univ La Serena, Inst Invest Multidisciplinar Ciencia & Tecnol, La Serena 1305, Chile

[3] Univ La Serena, Dept Fis & Astron, Av Juan Cisternas 1200 Norte, La Serena, Chile

[4] INAF Osservatorio Astron Roma, Via Frascati 33, I-00078 Monte Porzio Catone, Italy

[5] Univ Copenhagen, Cosm Dawn Ctr, Niels Bohr Inst, Juliane Maries Vej 30, DK-2100 Copenhagen O, Denmark

[6] Univ Diego Portales, Fac Ingn, Nucleo Astron, Av Ejercito 441, Santiago, Chile

[7] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

[8] European Southern Observ ESO, Vitacura 19001, Casilla, Chile

[9] Univ Massachusetts, Dept Astron, 710 N Pleasant Str, Amherst, MA 01003 USA

[10] Univ Geneva, Dept Astron, 51 Chemin Pegasi, CH-1290 Versoix, Switzerland

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

[12] Univ Bologna, Dept Phys & Astron DIFA, Via Gobetti 93-2, I-40129 Bologna, Italy

[13] INAF OAS Osservatorio Astrofis & Sci Spazio Bolog, Via Gobetti 93-3, I-40129 Bologna, Italy

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2022年 / 513卷 / 03期

基金：

瑞士国家科学基金会;

关键词：

galaxies: fundamental parameters; galaxies: high-redshift; intergalactic medium; LY-ALPHA EMISSION; UV LUMINOSITY FUNCTIONS; GAS COVERING FRACTION; SIMILAR-TO; 4; IONIZING-RADIATION; COSMIC REIONIZATION; DUST ATTENUATION; CIRCUMGALACTIC MEDIUM; STELLAR METALLICITY; EQUIVALENT WIDTH;

D O I：

10.1093/mnras/stac1067

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a study designed to measure the average Lyman-continuum escape fraction (< f(esc)>) of star-forming galaxies at similar or equal to 3.5. We assemble a sample of 148 galaxies from the VANDELS spectroscopic survey at 3.35 <= z(spec) <= 3.95, selected to minimize line-of-sight contamination of their photometry. For this sample, we use ultra-deep, ground-based, U-band imaging and Hubble Space Telescope V-band imaging to robustly measure the distribution of R-obs = (L-LyC/L-UV)(obs). We then model the R-obs distribution as a function of < f(esc)>, carefully accounting for attenuation by dust, the intergalactic medium and the circumgalactic medium. A maximum likelihood fit to the R(obs )distribution returns a best-fitting value of < f(esc)> = 0.07(-0.02)(+0.02), a result confirmed using an alternative Bayesian inference technique (both techniques exclude < f(esc)> = 0.0 at >3 sigma). By splitting our sample in two, we find evidence that < f(esc)> is positively correlated with Ly a equivalent width (W-lambda(Ly alpha)), with high and low W-lambda(Ly alpha) subsamples returning values of < f(esc)> = 0.12(-0.04)(+0.06) and < f(esc)> = 0.02(-0.01)(+0.02), respectively. In contrast, we find evidence that < f(esc)> is anticorrelated with intrinsic UV luminosity and UV dust attenuation; with low UV luminosity and dust attenuation subsamples both returning best fits in the range 0.10 <= < f(esc)> <= 0.22. We do not find a clear correlation between f(esc) and galaxy stellar mass, suggesting stellar mass is not a primary indicator of f(esc). Although larger samples are needed to further explore these trends, our results suggest that it is entirely plausible that the low dust, low-metallicity galaxies found at z >= 6 will display the < f(esc)> >= 0.1 required to drive reionization.

引用

页码：3510 / 3525

页数：16

共 112 条

[31] Voigt profile fitting to quasar absorption lines:: an analytic approximation to the Voigt-Hjerting function [J].

Garcia, Thorsten Tepper .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 369 (04) :2025-2035

[32] The VANDELS ESO public spectroscopic survey: Final data release of 2087 spectra and spectroscopic measurements [J].

Garilli, B. ;

McLure, R. ;

Pentericci, L. ;

Franzetti, P. ;

Gargiulo, A. ;

Carnall, A. ;

Cucciati, O. ;

Iovino, A. ;

Amorin, R. ;

Bolzonella, M. ;

Bongiorno, A. ;

Castellano, M. ;

Cimatti, A. ;

Cirasuolo, M. ;

Cullen, F. ;

Dunlop, J. ;

Elbaz, D. ;

Finkelstein, S. ;

Fontana, A. ;

Fontanot, F. ;

Fumana, M. ;

Guaita, L. ;

Hartley, W. ;

Jarvis, M. ;

Juneau, S. ;

Maccagni, D. ;

McLeod, D. ;

Nandra, K. ;

Pompei, E. ;

Pozzetti, L. ;

Scodeggio, M. ;

Talia, M. ;

Calabro, A. ;

Cresci, G. ;

Fynbo, J. P. U. ;

Hathi, N. P. ;

Hibon, P. ;

Koekemoer, A. M. ;

Magliocchetti, M. ;

Salvato, M. ;

Vietri, G. ;

Zamorani, G. ;

Almaini, O. ;

Balestra, I. ;

Bardelli, S. ;

Begley, R. ;

Brammer, G. ;

Bell, E. F. ;

Bowler, R. A. A. ;

Brusa, M. .

ASTRONOMY & ASTROPHYSICS, 2021, 647

[33] The origin of the escape of Lyman α and ionizing photons in Lyman continuum emitters [J].

Gazagnes, S. ;

Chisholm, J. ;

Schaerer, D. ;

Verhamme, A. ;

Izotov, Y. .

ASTRONOMY & ASTROPHYSICS, 2020, 639

[34] A quantitative comparison of the Small Magellanic Cloud, Large Magellanic Cloud, and Milky Way ultraviolet to near-infrared extinction curves [J].

Gordon, KD ;

Clayton, GC ;

Misselt, KA ;

Landolt, AU ;

Wolff, MJ .

ASTROPHYSICAL JOURNAL, 2003, 594 (01) :279-293

[35] SILVERRUSH. XI. Constraints on the Lyα Luminosity Function and Cosmic Reionization at z=7.3 with Subaru/Hyper Suprime-Cam [J].

Goto, Hinako ;

Shimasaku, Kazuhiro ;

Yamanaka, Satoshi ;

Momose, Rieko ;

Ando, Makoto ;

Harikane, Yuichi ;

Hashimoto, Takuya ;

Inoue, Akio K. ;

Ouchi, Masami .

ASTROPHYSICAL JOURNAL, 2021, 923 (02)

[36] Lyman continuum escape fraction of faint galaxies at z ∼ 3.3 in the CANDELS/GOODS-North, EGS, and COSMOS fields with LBC [J].

Grazian, A. ;

Giallongo, E. ;

Paris, D. ;

Boutsia, K. ;

Dickinson, M. ;

Santini, P. ;

Windhorst, R. A. ;

Jansen, R. A. ;

Cohen, S. H. ;

Ashcraft, T. A. ;

Scarlata, C. ;

Rutkowski, M. J. ;

Vanzella, E. ;

Cusano, F. ;

Cristiani, S. ;

Giavalisco, M. ;

Ferguson, H. C. ;

Koekemoer, A. ;

Grogin, N. A. ;

Castellano, M. ;

Fiore, F. ;

Fontana, A. ;

Marchi, F. ;

Pedichini, F. ;

Pentericci, L. ;

Amorin, R. ;

Barro, G. ;

Bonchi, A. ;

Bongiorno, A. ;

Faber, S. M. ;

Fumana, M. ;

Galametz, A. ;

Guaita, L. ;

Kocevski, D. D. ;

Merlin, E. ;

Nonino, M. ;

O'Connell, R. W. ;

Pilo, S. ;

Ryan, R. E. ;

Sani, E. ;

Speziali, R. ;

Testa, V. ;

Weiner, B. ;

Yan, H. .

ASTRONOMY & ASTROPHYSICS, 2017, 602

[37] A SYSTEMATIC STUDY OF Lyα TRANSFER THROUGH OUTFLOWING SHELLS: MODEL PARAMETER ESTIMATION [J].

Gronke, M. ;

Bull, P. ;

Dijkstra, M. .

ASTROPHYSICAL JOURNAL, 2015, 812 (02)

[38] Limits on the LyC signal from z ∼ 3 sources with secure redshift and HST coverage in the E-CDFS field [J].

Guaita, L. ;

Pentericci, L. ;

Grazian, A. ;

Vanzella, E. ;

Nonino, M. ;

Giavalisco, M. ;

Zamorani, G. ;

Bongiorno, A. ;

Cassata, P. ;

Castellano, M. ;

Garilli, B. ;

Gawiser, E. ;

Le Brun, V. ;

Le Fevre, O. ;

Lemaux, B. C. ;

Maccagni, D. ;

Merlin, E. ;

Santini, P. ;

Tasca, L. A. M. ;

Thomas, R. ;

Zucca, E. ;

De Barros, S. ;

Hathi, N. P. ;

Amorin, R. ;

Bardelli, S. ;

Fontana, A. .

ASTRONOMY & ASTROPHYSICS, 2016, 587

[39] GOLDRUSH. IV. Luminosity Functions and Clustering Revealed with ∼4,000,000 Galaxies at z ∼ 2-7: Galaxy-AGN Transition, Star Formation Efficiency, and Implication for Evolution at z > 10 [J].

Harikane, Yuichi ;

Ono, Yoshiaki ;

Ouchi, Masami ;

Liu, Chengze ;

Sawicki, Marcin ;

Shibuya, Takatoshi ;

Behroozi, Peter S. ;

He, Wanqiu ;

Shimasaku, Kazuhiro ;

Arnouts, Stephane ;

Coupon, Jean ;

Fujimoto, Seiji ;

Gwyn, Stephen ;

Huang, Jiasheng ;

Inoue, Akio K. ;

Kashikawa, Nobunari ;

Komiyama, Yutaka ;

Matsuoka, Yoshiki ;

Willott, Chris J. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2022, 259 (01)

[40] Array programming with NumPy [J].

Harris, Charles R. ;

Millman, K. Jarrod ;

van der Walt, Stefan J. ;

Gommers, Ralf ;

Virtanen, Pauli ;

Cournapeau, David ;

Wieser, Eric ;

Taylor, Julian ;

Berg, Sebastian ;

Smith, Nathaniel J. ;

Kern, Robert ;

Picus, Matti ;

Hoyer, Stephan ;

van Kerkwijk, Marten H. ;

Brett, Matthew ;

Haldane, Allan ;

del Rio, Jaime Fernandez ;

Wiebe, Mark ;

Peterson, Pearu ;

Gerard-Marchant, Pierre ;

Sheppard, Kevin ;

Reddy, Tyler ;

Weckesser, Warren ;

Abbasi, Hameer ;

Gohlke, Christoph ;

Oliphant, Travis E. .

NATURE, 2020, 585 (7825) :357-362

← 1 2 3 4 5 6 7 8 9 10 →