Results 41 to 50 of about 103 (81)

Census of Lyα Emission from ∼600 Galaxies at z = 5–14: Evolution of the Lyα Luminosity Function and a Late Sharp Cosmic Reionization

The Astrophysical Journal Supplement Series
We present the statistical properties of Ly α emission in 586 galaxies at z  = 4.5–14.2, observed by multiple JWST/NIRSpec spectroscopy projects, including the JADES, GLASS, CEERS, and GO/DDT programs.
Yuta Kageura, Masami Ouchi, Minami Nakane, Hiroya Umeda, Yuichi Harikane, Shintaro Yoshiura, Kimihiko Nakajima, Hidenobu Yajima, Tran Thi Thai   +8 more
doaj   +1 more source

Spectroscopic Ultraluminous Lyα Luminosity Functions at z = 5.7 and z = 6.6 from HEROES: Evidence for Ionized Bubbles

The Astrophysical Journal
We present spectroscopic Ly α luminosity functions (LFs) at z = 5.7 and z = 6.6 based on a large 209 source sample of Ly α emitter (LAE) candidates identified in Subaru/Hyper Suprime-Cam narrowband imaging and confirmed with Keck II/DEIMOS spectroscopy ...
A. J. Taylor, A. J. Barger, L. L. Cowie, E. M. Hu, A. Songaila   +4 more
doaj   +1 more source

A deep X-ray look to the most obscured quasar at z  ∼  3.6 and its environment

Astronomy & Astrophysics
Context. The most luminous and obscured quasars (QSOs) detected through sensitive infrared all-sky surveys are thought to represent a key co-evolutionary phase from nuclear to circumgalactic (CG) scales in the formation of massive galaxies.
Villani I., Zappacosta L., Piconcelli E., Ginolfi M., Ricci F., La Franca F., Arrigoni-Battaia F., Bongiorno A., Cantalupo S., Carniani S., Civano F., Comastri A., Fiore F., Maiolino R., Pentericci L., Ricci C., Schneider R., Valiante R., Vignali C., Vito F.   +19 more
doaj   +1 more source

Impact of Cosmic Ray-driven Outflows on Lyα Emission in Cosmological Simulations

The Astrophysical Journal
Cosmic ray (CR) feedback has been proposed as a powerful mechanism for driving warm gas outflows in galaxies. We use cosmological magnetohydrodynamic simulations to investigate the impact of CR feedback on neutral hydrogen (H i ) in a 10 ^11 M _⊙ dark ...
Taysun Kimm, Julien Devriendt, Francisco Rodríguez Montero, Adrianne Slyz, Jérémy Blaizot, Harley Katz, Beomchan Koh, Hyunmi Song   +7 more
doaj   +1 more source

Quasar Negative Feedback to Surrounding Galaxies Probed with Lyα Emitters and Continuum-selected Galaxies

The Astrophysical Journal Letters
We report on the statistical analysis of quasar photoevaporation at z  ∼ 2.2 by comparing the density of surrounding Ly α emitters (LAEs) and continuum-selected galaxies, based on the imaging data of the Hyper Suprime-Cam (HSC) Subaru Strategic Program ...
Yuta Suzuki, Yoshiki Matsuoka, Satoshi Kikuta, Hisakazu Uchiyama, Haruka Kusakabe, Masatoshi Imanishi   +5 more
doaj   +1 more source

Testing Lyα Emitters and Lyman-break Galaxies as Tracers of Large-scale Structures at High Redshifts

The Astrophysical Journal
We test whether Lyα emitters (LAEs) and Lyman-break galaxies (LBGs) can be good tracers of high- z large-scale structures, using the Horizon Run 5 cosmological hydrodynamical simulation.
Sang Hyeok Im, Ho Seong Hwang, Jaehong Park, Jaehyun Lee, Hyunmi Song, Stephen Appleby, Yohan Dubois, C. Gareth Few, Brad K. Gibson, Juhan Kim, Yonghwi Kim, Changbom Park, Christophe Pichon, Jihye Shin, Owain N. Snaith, M. Celeste Artale, Eric Gawiser, Lucia Guaita, Woong-Seob Jeong, Kyoung-Soo Lee, Nelson Padilla, Vandana Ramakrishnan, Paulina Troncoso, Yujin Yang   +23 more
doaj   +1 more source

Constraints on the z  ∼  6−13 intergalactic medium from JWST spectroscopy of Lyman-alpha damping wings in galaxies

Astronomy & Astrophysics
Context. JWST provides a unique dataset for studying the earliest stages of reionisation at z > 9, promising insights into the first galaxies. Many JWST/NIRSpec prism spectra of z > 5 galaxies have revealed smooth Lyman-alpha breaks, implying damping ...
Mason Charlotte A., Chen Zuyi, Stark Daniel P., Yi Lu Ting, Topping Michael, Tang Mengtao   +5 more
doaj   +1 more source

Lyα at Cosmic Dawn with a Simulated Roman Grism Deep Field

The Astronomical Journal
The slitless grism on the Nancy Grace Roman Space Telescope will enable deep near-infrared spectroscopy over a wide field of view. We demonstrate Roman's capability to detect Ly α galaxies at z > 7 using a multiple position angle (PA) observational ...
Isak G. B. Wold, Sangeeta Malhotra, James E. Rhoads, Vithal Tilvi, Austen Gabrielpillai   +4 more
doaj   +1 more source

KBSS-InCLOSE. I. Design and First Results from the Inner Circumgalactic Medium of QSO Line-of-sight Emitting Galaxies at z ∼ 2–3

The Astrophysical Journal
We present the design and first results of the inner circumgalactic medium (CGM) of QSO line-of-sight emitting galaxies at z ∼ 2–3, Keck Baryonic Structure Survey (KBSS)-InCLOSE.
Evan Haze Nuñez, Charles C. Steidel, Evan N. Kirby, Gwen C. Rudie, Nikolaus Z. Prusinski, Yuguang Chen, Zhuyun Zhuang, Allison L. Strom, Dawn K. Erb, Max Pettini, Louise Welsh, David S. N. Rupke, Ryan J. Cooke   +12 more
doaj   +1 more source

Challenging the LyC–Lyα Relation: Strong Lyα Emitters without LyC Leakage at z ∼ 2.3

The Astrophysical Journal
The escape fraction of Lyman continuum (LyC) ionizing radiation ( ${f}_{{\rm{esc}}}^{{\rm{LyC}}}$ ) is crucial for understanding reionization, yet difficult to measure at z  ≳ 4. Recently, studies have focused on calibrating indirect indicators of ${f}_{{
Annalisa Citro, Claudia M. Scarlata, Kameswara B. Mantha, Liliya R. Williams, Marc Rafelski, Mitchell Revalski, Matthew J. Hayes, Alaina Henry, Michael J. Rutkowski, Harry I. Teplitz, Andrea Grazian, Anahita Alavi   +11 more
doaj   +1 more source