The Lyman Continuum Escape Fraction of Emission Line-selected z ∼ 2.5 Galaxies Is Less Than 15%

被引：43

作者：

Rutkowski, Michael J. ^{[1
]}

Scarlata, Claudia ^{[2
]}

Henry, Alaina ^{[3
]}

Hayes, Matthew ^{[1
]}

Mehta, Vihang ^{[2
]}

Hathi, Nimish ^{[3
,4
]}

Cohen, Seth ^{[5
]}

Windhorst, Rogier ^{[5
]}

Koekemoer, Anton M. ^{[3
]}

Teplitz, Harry I. ^{[6
]}

Haardt, Francesco ^{[7
,8
]}

Siana, Brian ^{[9
]}

机构：

[1] Stockholm Univ, AlbaNova Univ Ctr, Dept Astron, SE-10691 Stockholm, Sweden

[2] Univ Minnesota, Minnesota Inst Astrophys, 116 Church St SE, Minneapolis, MN 55455 USA

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

[4] Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France

[5] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85281 USA

[6] CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125 USA

[7] Univ DellInsubria, DiSAT, Via Valleggio 11, I-22100 Como, Italy

[8] INFN, Sez Milano Bicocca, Piazza Sci 3, I-20123 Milan, Italy

[9] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2017年 / 841卷 / 02期

基金：

瑞典研究理事会;

关键词：

galaxies: general; galaxies: star formation; ultraviolet: galaxies; SPACE-TELESCOPE SEARCH; STAR-FORMING GALAXIES; PHOTOMETRIC REDSHIFTS; REIONIZATION; CONSTRAINTS; ABSORPTION; PLANCK; ALPHA; RATIO;

D O I：

10.3847/2041-8213/aa733b

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recent work suggests that strong emission line, star-forming galaxies (SFGs) may be significant Lyman continuum leakers. We combine archival Hubble Space Telescope broadband ultraviolet and optical imaging (F275W and F606W, respectively) with emission line catalogs derived from WFC3 IR G141 grism spectroscopy to search for escaping Lyman continuum (LyC) emission from homogeneously selected z similar to 2.5 SFGs. We detect no escaping Lyman continuum from SFGs selected on [O II] nebular emission (N = 208) and, within a narrow redshift range, on [O III]/[O II]. We measure 1 sigma upper limits to the LyC escape fraction relative to the non-ionizing UV continuum from [O II] emitters, f(esc) less than or similar to 5.6%, and strong [O III]/[O II] > 5 ELGs, f(esc) less than or similar to 14.0%. Our observations are not deep enough to detect f(esc) similar to 10% typical of low-redshift Lyman continuum emitters. However, we find that this population represents a small fraction of the star-forming galaxy population at z similar to 2. Thus, unless the number of extreme emission line galaxies grows substantially to z greater than or similar to 6, such galaxies may be insufficient for reionization. Deeper survey data in the rest-frame ionizing UV will be necessary to determine whether strong line ratios could be useful for pre-selecting LyC leakers at high redshift.

引用

页数：5

共 36 条

[1]

Aghanim N., 2016, AA, V596, pA105, DOI DOI 10.1051/0004-6361/201628636

[2] THE WFC3 INFRARED SPECTROSCOPIC PARALLEL (WISP) SURVEY [J].

Atek, H. ;

Malkan, M. ;

McCarthy, P. ;

Teplitz, H. I. ;

Scarlata, C. ;

Siana, B. ;

Henry, A. ;

Colbert, J. W. ;

Ross, N. R. ;

Bridge, C. ;

Bunker, A. J. ;

Dressler, A. ;

Fosbury, R. A. E. ;

Martin, C. ;

Shim, H. .

ASTROPHYSICAL JOURNAL, 2010, 723 (01) :104-115

[3] Stellar population synthesis at the resolution of 2003 [J].

Bruzual, G ;

Charlot, S .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2003, 344 (04) :1000-1028

[4] MEASURING THE SOURCES OF THE INTERGALACTIC IONIZING FLUX [J].

Cowie, L. L. ;

Barger, A. J. ;

Trouille, L. .

ASTROPHYSICAL JOURNAL, 2009, 692 (02) :1476-1488

[5]

de Barros S, 2016, ASTRON ASTROPHYS, V585, DOI [10.1051/0004-6361/20157046, 10.1051/0004-6361/201527046]

[6] REVISITING THE LYMAN CONTINUUM ESCAPE CRISIS: PREDICTIONS FOR z > 6 FROM LOCAL GALAXIES [J].

Faisst, Andreas L. .

ASTROPHYSICAL JOURNAL, 2016, 829 (02)

[7]

Fardal M., 1998, AJ, V15, P2206

[8] Faint AGNs at z > 4 in the CANDELS GOODS-S field: looking for contributors to the reionization of the Universe [J].

Giallongo, E. ;

Grazian, A. ;

Fiore, F. ;

Fontana, A. ;

Pentericci, L. ;

Vanzella, E. ;

Dickinson, M. ;

Kocevski, D. ;

Castellano, M. ;

Cristiani, S. ;

Ferguson, H. ;

Finkelstein, S. ;

Grogin, N. ;

Hathi, N. ;

Koekemoer, A. M. ;

Newman, J. A. ;

Salvato, M. .

ASTRONOMY & ASTROPHYSICS, 2015, 578

[9] The Lyman continuum escape fraction of galaxies at z=3.3 in the VUDS-LBC/COSMOS field [J].

Grazian, A. ;

Giallongo, E. ;

Gerbasi, R. ;

Fiore, F. ;

Fontana, A. ;

Le Fevre, O. ;

Pentericci, L. ;

Vanzella, E. ;

Zamorani, G. ;

Cassata, P. ;

Garilli, B. ;

Le Brun, V. ;

Maccagni, D. ;

Tasca, L. A. M. ;

Thomas, R. ;

Zucca, E. ;

Amorin, R. ;

Bardelli, S. ;

Cassara, L. P. ;

Castellano, M. ;

Cimatti, A. ;

Cucciati, O. ;

Durkalec, A. ;

Giavalisco, M. ;

Hathi, N. P. ;

Ilbert, O. ;

Lemaux, B. C. ;

Paltani, S. ;

Ribeiro, B. ;

Schaerer, D. ;

Scodeggio, M. ;

Sommariva, V. ;

Talia, M. ;

Tresse, L. ;

Vergani, D. ;

Bonchi, A. ;

Boutsia, K. ;

Capak, P. ;

Charlot, S. ;

Contini, T. ;

de la Torre, S. ;

Dunlop, J. ;

Fotopoulou, S. ;

Guaita, L. ;

Koekemoer, A. ;

Lopez-Sanjuan, C. ;

Mellier, Y. ;

Merlin, E. ;

Paris, D. ;

Pforr, J. .

ASTRONOMY & ASTROPHYSICS, 2016, 585

[10] RADIATIVE TRANSFER IN A CLUMPY UNIVERSE. IV. NEW SYNTHESIS MODELS OF THE COSMIC UV/X-RAY BACKGROUND [J].

Haardt, Francesco ;

Madau, Piero .

ASTROPHYSICAL JOURNAL, 2012, 746 (02)

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