Results 101 to 110 of about 14,841,931 (226)

Galaxies and large scale structure at high redshifts [PDF]

Proceedings of the National Academy of Sciences, 1998
It is now straightforward to assemble large samples of very high redshift ( z ∼ 3) field galaxies selected by their pronounced spectral discontinuity at the rest frame Lyman limit of hydrogen (at 912 Å).
openaire   +4 more sources

Lyman Continuum and Lyman α Emission from Galaxies at High Redshift [PDF]

, 2010
In this thesis we present two studies of star-forming galaxies at z ≈2-3 based on deep spectroscopic and narrow band imaging observations. The first study addresses pressing questions regarding the nature of galaxies with significant escaping Lyman ...
Bogosavljević, Milan
core   +1 more source

The AGORA High-resolution Galaxy Simulations Comparison Project. X. Formation and Evolution of Galaxies at the High-redshift Frontier

The Astrophysical Journal
Recent observations from the James Webb Space Telescope have revealed unexpectedly luminous galaxies, exhibiting stellar masses and luminosities significantly higher than predicted by theoretical models at Cosmic Dawn.
Hyeonyong Kim, Ji-hoon Kim, Minyong Jung, Santi Roca-Fàbrega, Daniel Ceverino, Pablo Granizo, Kentaro Nagamine, Joel R. Primack, Héctor Velázquez, Kirk S. S. Barrow, Robert Feldmann, Keita Fukushima, Lucio Mayer, Boon Kiat Oh, Johnny W. Powell, Tom Abel, Oscar Agertz, Chaerin Jeong, Alessandro Lupi, Yuri Oku, Thomas R. Quinn, Yves Revaz, Ramón Rodríguez-Cardoso, Ikkoh Shimizu, Romain Teyssier, AGORA COLLABORATION   +25 more
doaj   +1 more source

The Thickness of Galaxy Disks from z = 5 to 0 Probed by JWST

The Astrophysical Journal Letters
Although a thick disk is a structure prevalent in local disk galaxies and also present in our home Galaxy, its formation and evolution are still unclear.
Jianhui Lian, Li Luo
doaj   +1 more source

EPOCHS. I. The Discovery and Star-forming Properties of Galaxies in the Epoch of Reionization at 6.5 < z < 18 with PEARLS and Public JWST Data

The Astrophysical Journal
We present in this paper the discovery, properties, and a catalog of 1165 high-redshift 6.5  12 in our sample and describe their properties. Finally, we note a significant observed excess of galaxies compared to models at z  > 12, revealing a tension ...
Christopher J. Conselice, Nathan Adams, Thomas Harvey, Duncan Austin, Leonardo Ferreira, Katherine Ormerod, Qiao Duan, James Trussler, Qiong Li, Ignas Juodžbalis, Lewi Westcott, Honor Harris, Louise T. C. Seeyave, Asa F. L. Bluck, Rogier A. Windhorst, Rachana Bhatawdekar, Dan Coe, Seth H. Cohen, Cheng Cheng, Simon P. Driver, Brenda Frye, Lukas J. Furtak, Norman A. Grogin, Nimish P. Hathi, Benne W. Holwerda, Rolf A. Jansen, Anton M. Koekemoer, Madeline A. Marshall, Mario Nonino, Aaron Robotham, Jake Summers, Stephen M. Wilkins, Christopher N. A. Willmer, Haojing Yan, Adi Zitrin   +34 more
doaj   +1 more source

The drivers of cosmic dust temperature evolution

Astronomy & Astrophysics
Context. Observations of the rest-frame far-infrared (far-IR) emission of galaxies suggest a mild increase in dust temperature Tdust with redshift. However, constraining Tdust in high-redshift systems remains challenging due to limited sampling of the ...
Parente M., Salvestrini F., Granato G. L., Narayanan D., Tripodi R., Bianchi S., Bischetti M., Feruglio C., Fiore F., Silva L.   +9 more
doaj   +1 more source

Galaxy evolution in overdense environments at high redshift: passive early-type galaxies in a cluster at redshift 2 [PDF]

, 2013
17 pages, 13 figures, ApJ in pressInternational audienceWe present a study of galaxy populations in the central region of the IRAC-selected, X-ray detected galaxy cluster Cl J1449+0856 at z=2.
Cimatti, A., Gobat R., Renzini A., Arimoto, N., Daddi, E., Chary RR, Arimoto N., Finoguenov A, Dickinson, M., Onodera M., Daddi E, Carollo M, Dickinson M., Dickinson M, Finoguenov, A., Strazzullo V., Chary, R. -R., Renzini, A., Finoguenov A., Cimatti A, Renzini A, Daddi E., Gobat, R., Cimatti, Alessandro, Arimoto N, Gobat R, Chary R. R., Carollo, M., Strazzullo V, Onodera M, CIMATTI, ANDREA, Strazzullo, V., Onodera, M., Daddi, Emanuele, Carollo M., Chary, R.-R.   +35 more
core   +1 more source

Multivariate Predictors of Lyman Continuum Escape. II. Predicting Lyman Continuum Escape Fractions for High-redshift Galaxies

The Astrophysical Journal
JWST is uncovering the properties of ever-increasing numbers of galaxies at z > 6, during the epoch of reionization. Connecting these observed populations to the process of reionization requires understanding how efficiently they produce Lyman continuum (
Anne E. Jaskot, Anneliese C. Silveyra, Anna Plantinga, Sophia R. Flury, Matthew Hayes, John Chisholm, Timothy Heckman, Laura Pentericci, Daniel Schaerer, Maxime Trebitsch, Anne Verhamme, Cody Carr, Henry C. Ferguson, Zhiyuan Ji, Mauro Giavalisco, Alaina Henry, Rui Marques-Chaves, Göran Östlin, Alberto Saldana-Lopez, Claudia Scarlata, Gábor Worseck, Xinfeng Xu   +21 more
doaj   +1 more source

A Steep Decline in the Galaxy Space Density beyond Redshift 9 in the CANUCS UV Luminosity Function

The Astrophysical Journal
We present a new sample of 158 galaxies at redshift z > 7.5 selected from deep James Webb Space Telescope (JWST) NIRCam imaging of five widely separated sight lines in the CANUCS survey.
Chris J. Willott, Guillaume Desprez, Yoshihisa Asada, Ghassan T. E. Sarrouh, Roberto Abraham, Maruša Bradač, Gabe Brammer, Vince Estrada-Carpenter, Kartheik G. Iyer, Nicholas S. Martis, Jasleen Matharu, Lamiya Mowla, Adam Muzzin, Gaël Noirot, Marcin Sawicki, Victoria Strait, Gregor Rihtaršič, Sunna Withers   +17 more
doaj   +1 more source

Nebular continuum in high-redshift galaxies with JWST

Astronomy & Astrophysics
Context. The study of the relevance of accounting for both stellar and nebular continuum emission when performing optical spectral fitting has been mainly limited to galaxies in the local Universe.
Miranda Henrique, Pappalardo Ciro, Afonso José, Papaderos Polychronis, Carvajal Rodrigo   +4 more
doaj   +1 more source