Results 61 to 70 of about 141,253 (114)

Neutral Gas Properties and Lyα Escape in Extreme Green Pea Galaxies [PDF]

, 2019
Mechanisms regulating the escape of Lyα photons and ionizing radiation remain poorly understood. To study these processes, we analyze Very Large Array 21 cm observations of one Green Pea (GP), J160810+352809 (hereafter J1608), and Hubble Space Telescope ...
Dowd, Tara, Oey, M. S., McKinney, Jed H., Lowenthal, James, Yun, Min S., Jaskot, Anne E.   +5 more
core   +1 more source

The Lyα forest around high-redshift galaxies

, 2003
International audienceMotivated by the relative lack of neutral hydrogen around Lyman-break galaxies deduced from recent observations, we investigate the properties of the Lyα forest around high-redshift galaxies. The study is based on improved numerical
Ferrara, A., Schneider, R., SCHNEIDER, Raffaella, Marri, S., Aracil, B., Rollinde, E., Maselli, A., Bruscoli, M., Bruscoli, M   +8 more
core   +1 more source

The Lyα Nondetection by JWST NIRSpec of a Strong Lyα Emitter at z = 5.66 Confirmed by MUSE

The Astrophysical Journal
The detections of Ly α emission in galaxies with redshifts above 5 are of utmost importance for constraining the cosmic reionization timeline, yet such detections are usually based on slit spectroscopy. Here we investigate the significant bias induced by
Haochen Jiang, Xin Wang, Cheng Cheng, Xu Kong, Qianqiao Zhou, Xiao-Lei Meng, Xianlong He, Tucker Jones, Kristan Boyett   +8 more
doaj   +1 more source

Hubble Space Telescope Imaging and Keck Spectroscopy of z≈ 6 i‐Band Dropout Galaxies in the Advanced Camera for Surveys GOODS Fields [PDF]

, 2004
We measure the surface density of i'-band dropout galaxies at z ~ 6 through wide-field Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) imaging and ultradeep Keck DEIMOS spectroscopy.
McCarthy, PJ, McCarthy, Pat, Ellis, Richard S., Ellis, RS, Stanway, Elizabeth R., Stanway, ER, McMahon, RG, Treu, T, Bunker, Andrew, Treu, Tommaso, McMahon, R. G., Bunker, AJ, Bunker, Andrew J.   +12 more
core   +1 more source

Lyα Radiative Transfer Modeling for 163 MUSE Lyα-emitting Galaxies at z = 3–6

The Astrophysical Journal
We utilized Ly α radiative transfer calculations from H. Song et al. to investigate the properties of extended Ly α halos around star-forming galaxies in the Hubble Ultra Deep Field, observed by the Multi-Unit Spectroscopic Explorer.
Sangeun Yu, Hyunmi Song, Kwang-Il Seon
doaj   +1 more source

Lyα Emission at z = 7–13: Clear Evolution of Lyα Equivalent Width Indicating a Late Cosmic Reionization History

The Astrophysical Journal
We present the evolution of Ly α emission derived from 53 galaxies at z = 6.6–13.2, which have been identified by multiple JWST/NIRSpec spectroscopy programs of Early Release Science, General Observer, Director's Discretionary Time, and Guaranteed Time ...
Minami Nakane, Masami Ouchi, Kimihiko Nakajima, Yuichi Harikane, Yoshiaki Ono, Hiroya Umeda, Yuki Isobe, Yechi Zhang, Yi Xu   +8 more
doaj   +1 more source

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

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

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

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