CEERS: Diversity of Lyα Emitters during the Epoch of Reionization

被引：30

作者：

Jung, Intae ^{[1
]}

Finkelstein, Steven L. ^{[2
]}

Haro, Pablo Arrabal ^{[3
]}

Dickinson, Mark ^{[3
]}

Ferguson, Henry C. ^{[1
]}

Hutchison, Taylor A. ^{[4
]}

Kartaltepe, Jeyhan S. ^{[5
]}

Larson, Rebecca L. ^{[2
]}

Simons, Raymond C. ^{[6
]}

Papovich, Casey ^{[7
,8
]}

Park, Hyunbae ^{[9
,10
]}

Pentericci, Laura ^{[11
]}

Trump, Jonathan R. ^{[6
]}

Amorin, Ricardo O. ^{[12
,13
]}

Backhaus, Bren E. ^{[6
]}

Bagley, Micaela B. ^{[2
]}

Casey, Caitlin M. ^{[2
]}

Cheng, Yingjie ^{[14
]}

Cleri, Nikko J. ^{[7
,8
]}

Cooper, M. C. ^{[15
]}

Cooper, Olivia R. ^{[2
]}

Gardner, Jonathan P. ^{[4
]}

Gawiser, Eric ^{[16
]}

Grazian, Andrea ^{[17
]}

Hathi, Nimish P. ^{[1
]}

Hirschmann, Michaela ^{[18
]}

Koekemoer, Anton M. ^{[1
]}

Lucas, Ray A. ^{[1
]}

Mobasher, Bahram ^{[19
]}

Pirzkal, Nor ^{[20
]}

Ravindranath, Swara ^{[1
]}

Straughn, Amber N. ^{[4
]}

Yung, L. Y. Aaron ^{[4
]}

de la Vega, Alexander ^{[19
]}

机构：

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

[2] Univ Texas Austin, Dept Astron, Austin, TX USA

[3] NSFs Natl Opt Infrared Astron Res Lab, 950 N Cherry Ave, Tucson, AZ 85719 USA

[4] NASA, Astrophys Sci Div, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA

[5] Rochester Inst Technol, Sch Phys & Astron, Lab Multiwavelength Astrophys, 84 Lomb Mem Dr, Rochester, NY 14623 USA

[6] Univ Connecticut, Dept Phys, 196 Auditorium Rd,Unit 3046, Storrs, CT 06269 USA

[7] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA

[8] Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA

[9] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[10] Univ Calif Berkeley, Berkeley Ctr Cosmol Phys, Berkeley, CA 94720 USA

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

[12] Univ La Serena, Inst Invest Multidisciplinar Ciencia & Tecnol, Raul Bitran 1305, La Serena 2204000, Chile

[13] Univ La Serena, Dept Astron, Ave Juan Cisternas 1200 Norte, La Serena 1720236, Chile

[14] Univ Massachusetts Amherst, 710 North Pleasant St, Amherst, MA 01003 USA

[15] Univ Calif Irvine, Dept Phys & Astron, 4129 Reines Hall, Irvine, CA 92697 USA

[16] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[17] INAF, Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy

[18] Ecole Polytech Fed Lausanne EPFL, Inst Phys, Lab Galaxy Evolut, Observ Sauverny, CH-1290 Versoix, Switzerland

[19] Univ Calif Riverside, Dept Phys & Astron, 900 Univ Ave, Riverside, CA 92521 USA

[20] ESA AURA Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

来源：

ASTROPHYSICAL JOURNAL | 2024年 / 967卷 / 01期

关键词：

STAR-FORMING GALAXIES; EMISSION-LINE GALAXIES; SIMILAR-TO; 8; INFRARED SPECTROGRAPH NIRSPEC; EQUIVALENT-WIDTH DISTRIBUTION; MASS-METALLICITY RELATION; LYMAN BREAK GALAXIES; INTERGALACTIC MEDIUM; UV-BRIGHT; COSMIC REIONIZATION;

D O I：

10.3847/1538-4357/ad3913

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze rest-frame ultraviolet to optical spectra of three z similar or equal to 7.47-7.75 galaxies whose Ly alpha emission lines were previously detected with Keck/MOSFIRE observations, using the JWST/NIRSpec observations from the Cosmic Evolution Early Release Science survey. From NIRSpec data, we confirm the systemic redshifts of these Ly alpha emitters, and emission-line ratio diagnostics indicate these galaxies were highly ionized and metal-poor. We investigate Ly alpha line properties, including the line flux, velocity offset, and spatial extent. For the one galaxy where we have both NIRSpec and MOSFIRE measurements, we find a significant offset in their flux measurements (similar to 1.3-5x greater in MOSFIRE) and a marginal difference in the velocity shifts. The simplest interpretation is that the Ly alpha emission is extended and not entirely encompassed by the NIRSpec slit. The cross-dispersion profiles in NIRSpec reveal that Ly alpha in one galaxy is significantly more extended than the nonresonant emission lines. We also compute the expected sizes of ionized bubbles that can be generated by the Ly alpha sources and discuss viable scenarios for the creation of sizable ionized bubbles (>1 physical Mpc). The source with the highest-ionization condition is possibly capable of ionizing its own bubble, while the other two do not appear to be capable of ionizing such a large region, but require additional sources of ionizing photons. Therefore, the fact that we detect Ly alpha from these galaxies suggests diverse scenarios for the escape of Ly alpha during the epoch of reionization. High-spectral-resolution spectra with JWST/NIRSpec will be extremely useful for constraining the physics of patchy reionization.

引用

页数：14

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