Results 101 to 110 of about 210 (157)

In Search of the First Stars: An Ultra-compact and Very-low-metallicity Lyα Emitter Deep within the Epoch of Reionization

The Astrophysical Journal
We present JWST observations of a gravitationally lensed, extremely metal-poor galaxy at redshift z = 8.203 ± 0.001 from the CANUCS survey. Based on the low oxygen to Balmer line ratios, we infer a gas-phase metallicity of 12 + log(O/H) = 6.85 (1.4 ...
Chris J. Willott, Yoshihisa Asada, Kartheik G. Iyer, Jon Judež, Gregor Rihtaršič, Nicholas S. Martis, Ghassan T. E. Sarrouh, Guillaume Desprez, Anishya Harshan, Lamiya Mowla, Gaël Noirot, Giordano Felicioni, Maruša Bradač, Gabe Brammer, Adam Muzzin, Marcin Sawicki, Jacqueline Antwi-Danso, Vladan Markov, Roberta Tripodi   +18 more
doaj   +1 more source

The Redshift Evolution of Extended Lyα Emission in HETDEX. I. Imaging Methods and Emission Measurements

The Astrophysical Journal
We investigate extended Ly α emission using integral-field unit (IFU) data from the Hobby–Eberly Telescope Dark Energy Experiment (or HETDEX). We apply the modified Shepard method to image 106,853 Ly α emitters (LAEs) and median-stack them as functions ...
Brianna McKay, Sarah Tuttle, Erin Mentuch Cooper, Dustin Davis, Robin Ciardullo, Daniel J. Farrow, Steven L. Finkelstein, Karl Gebhardt, Chenxu Liu, Gregory Zeimann, Chris Byrohl   +10 more
doaj   +1 more source

ODIN: Spectroscopic Validation of Lyα-emitting Galaxy Samples with DESI

The Astrophysical Journal
The One-hundred-deg ^2 DECam Imaging in Narrowbands (ODIN) survey is conducting the widest-field deep narrowband (NB) imaging of the equatorial and southern skies.
Ethan Pinarski, Govind Ramgopal, Nicole Firestone, Kyoung-Soo Lee, Eric Gawiser, Arjun Dey, Anand Raichoor, Francisco Valdes, Robin Ciardullo, Jessica N. Aguilar, S. Ahlen, Davide Bianchi, D. Brooks, Francisco J. Castander, M. Candela Cerdosino, T. Claybaugh, Andrei Cuceu, Kyle S. Dawson, Axel de la Macorra, Peter Doel, Simone Ferraro, Andreu Font-Ribera, Jaime E. Forero-Romero, Enrique Gaztañaga, Satya Gontcho A Gontcho, Lucia Guaita, Gaston Gutierrez, Stephen Gwyn, Hiram K. Herrera-Alcantar, Ho Seong Hwang, Richard Joyce, Stephanie Juneau, Robert Kehoe, David Kirkby, Theodore Kisner, Anthony Kremin, Ankit Kumar, Claire Lamman, Martin Landriau, Laurent Le Guillou, Michael E. Levi, Yufeng Luo, Marc Manera, Paul Martini, Aaron Meisner, Ramon Miquel, John Moustakas, A. D. Myers, Seshadri Nadathur, Gautam R. Nagaraj, Nathalie Palanque-Delabrouille, Changbom Park, Will J. Percival, Ignaci Pérez-Ràfols, F. Prada, G. Rossi, E. Sanchez, Marcin Sawicki, David Schlegel, M. Schubnell, Joseph Silber, Hyunmi Song, David Sprayberry, Gregory Tarlé, Paulina Troncoso Iribarren, B. A. Weaver, Yujin Yang, Ann Zabludoff   +67 more
doaj   +1 more source

Observing Lyman alpha emitters - How does Lyman alpha escape from galaxies?

, 2016
The Lyman alpha (Lyα) emission line has grown to become one of the most successful tools for finding galaxies at high redshift. At redshifts corresponding to the early cosmic times of reionization and primeval galaxy formation, the wavelength of Lyα is still accessible with ground-based facilities.
openaire   +1 more source

Design For The First Narrowband Filter For The Dark Energy Camera: Optimizing The LAGER Survey For Z ~ 7 Galaxies. [PDF]

Publ Astron Soc Pac, 2019
Zheng ZY, Rhoads JE, Wang J, Malhotra S, Walker A, Mooney T, Jiang C, Hu W, Hibon P, Jiang L, Infante L, Barrientos LF, Galaz G, Valdes F, Wester W, Yang H, Coughlin A, Harish S, Kang W, Khostovan AA, Kong X, Perez LA, Pharo J, Wold I, Zheng X.   +24 more
europepmc   +1 more source

CECILIA: Ultradeep Rest-optical Spectra of Faint Galaxies at Cosmic Noon

The Astrophysical Journal Letters
Intrinsically faint galaxies at z  ∼ 2–3 offer critical insights into early galaxy formation, tracing low-metallicity, low-mass systems during cosmic noon and serving as analogs to reionization-era galaxies. We present ultradeep JWST/NIRSpec spectroscopy
Menelaos Raptis, Ryan F. Trainor, Allison L. Strom, Gwen C. Rudie, Noah S. J. Rogers, Charles C. Steidel, Michael V. Maseda, Caroline von Raesfeld, Nathalie A. Korhonen Cuestas   +8 more
doaj   +1 more source

Connecting Lyα and Ionizing Photon Escape in the Sunburst Arc

The Astrophysical Journal
We investigate the Ly α and Lyman continuum (LyC) properties of the Sunburst Arc, a z = 2.37 gravitationally lensed galaxy with a multiply imaged, compact region leaking LyC and a triple-peaked Ly α profile indicating direct Ly α escape.
M. Riley Owens, Keunho J. Kim, Matthew B. Bayliss, T. Emil Rivera-Thorsen, Keren Sharon, Jane R. Rigby, Alexander Navarre, Michael Florian, Michael D. Gladders, Jessica G. Burns, Gourav Khullar, John Chisholm, Guillaume Mahler, Håkon Dahle, Christopher M. Malhas, Brian Welch, Taylor A. Hutchison, Raven Gassis, Suhyeon Choe, Prasanna Adhikari, Sloan Giant Arcs Survey   +20 more
doaj   +1 more source

JWST Unveils the Bimodal Nature of Lyα Emitters at 3 < z < 7: Pristine versus Merger-driven Populations

The Astrophysical Journal
We present a systematic study of merging galaxies among Lyα emitters (LAEs) using James Webb Space Telescope/NIRCam high-resolution imaging data. From a large sample of 817 spectroscopically confirmed LAEs at 3  6 to 70% at z  
Jian Ren, F. S. Liu, Nan Li, Qi Song, Pinsong Zhao, Qifan Cui, Yubin Li, Hao Mo, Guanghuan Wang, Hassen M. Yesuf, Weichen Wang   +10 more
doaj   +1 more source

Cold and stable antimatter for fundamental physics. [PDF]

Proc Jpn Acad Ser B Phys Biol Sci, 2020
Yamazaki Y.
europepmc   +1 more source

CLASSY. XI. Tracing Neutral Gas Properties Using UV Absorption Lines and 21 cm Observations

The Astrophysical Journal
Rest-frame far-ultraviolet (FUV) observations from JWST are revolutionizing our understanding of the high- z galaxies that drove reionization and the mechanisms by which they accomplished it.
Kaelee S. Parker, Danielle A. Berg, Simon Gazagnes, John Chisholm, Bethan L. James, Matthew Hayes, Timothy Heckman, Alaina Henry, Michelle A. Berg, Karla Z. Arellano-Córdova, Xinfeng Xu, Dawn K. Erb, Crystal L. Martin, Weida Hu, Evan D. Skillman, Kristen B. W. McQuinn, Zuyi Chen, Dan P. Stark   +17 more
doaj   +1 more source