Results 141 to 150 of about 210,144 (261)

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
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Tracing nitrogen enrichment across cosmic time with JWST

Astronomy & Astrophysics
We present a comprehensive analysis of the nitrogen-to-oxygen (N/O) abundance ratio in a sample of ∼660 star-forming galaxies at redshift z ∼ 1 − 6, with a median redshift of ⟨z⟩ = 3.0, using deep JWST/NIRSpec spectroscopy. Leveraging detections of faint
Cataldi E., Belfiore F., Curti M., Moreschini B., Marconi A., Maiolino R., Feltre A., Ginolfi M., Mannucci F., Cresci G., Ji X., Amiri A., Arnaboldi M., Bertola E., Bracci C., Ceci M., Chakraborty A., Cullen F., D’Amato Q., Kobayashi C., Lamperti I., Marconcini C., Scialpi M., Ulivi L., Zanchettin M. V.   +24 more
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Imaging of Three Possible Low Redshift Analogs to High Redshift Compact Red Galaxies

, 2011
As part of a larger program to identify and characterize possible low-redshift analogs to massive compact red galaxies found at high redshift, we have examined the morphologies of three low-redshift compact galaxies drawn from the sample of Trujillo et ...
Alan Stockton, Blanton, Buitrago, Calzetti, Daddi, Damjanov, Fan, Franx, Hsin-Yi Shih, Khochfar, Kriek, Muzzin, Peng, Stockton, Stockton, Stockton, Taylor, Toft, Trujillo, van Dokkum, van Dokkum, Wuyts, Zirm   +22 more
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A search for distant radio galaxies from SUMSS and NVSS: III. radio spectral energy distributions and the z-alpha correlation

, 2006
This is the third in a series of papers that present observations and results for a sample of 76 ultra-steep-spectrum radio sources designed to find galaxies at high redshift.
Bryant, J. J., De Breuck, C., Ekers, R. D., Hunstead, R. W., Klamer, I. J., Sadler, E. M.   +5 more
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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
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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
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The Origin of \lya Absorption Systems at $z>1$---Implications from the Hubble Deep Field

, 1999
The Hubble Deep Field images have provided us with a unique chance to relate statistical properties of high-redshift galaxies to statistical properties of \lya absorption systems.
Alberto Fernandez‐Soto, Ellis R. S., Frye B. L., Hsiao‐Wen Chen, Kenneth M. Lanzetta, Storrie-Lombardi L. J.   +5 more
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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
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ALESS-JWST: Joint (Sub)kiloparsec JWST and ALMA Imaging of z ~ 3 Submillimeter Galaxies Reveals Heavily Obscured Bulge Formation Events

The Astrophysical Journal
We present JWST NIRCam imaging targeting 13 z  ~ 3 infrared-luminous ( L _IR  ∼ 5 × 10 ^12 L _⊙ ) galaxies from the ALESS survey with uniquely deep, high-resolution (0 $\mathop{.}\limits^{\unicode{x02033}}$ 08–0 $\mathop{.}\limits^{^{\prime\prime} }$ 16)
J. A. Hodge, E. da Cunha, S. Kendrew, J. Li, I. Smail, B. A. Westoby, O. Nayak, A. M. Swinbank, C.-C. Chen, F. Walter, P. van der Werf, M. Cracraft, A. Battisti, W. N. Brandt, G. Calistro Rivera, S. C. Chapman, P. Cox, H. Dannerbauer, R. Decarli, M. Frias Castillo, T. R. Greve, K. K. Knudsen, S. Leslie, K. M. Menten, M. Rybak, E. Schinnerer, J. L. Wardlow, A. Weiss   +27 more
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Clustering of galaxies at high redshifts [PDF]

Monthly Notices of the Royal Astronomical Society, 1998
Recent observations show a large concentration of galaxies at high redshift. At first sight, strong clustering of galaxies at high redshifts seems to be in contradiction with the models of structure formation. In this paper we show that such structures are a manifestation of the strong clustering of rare peaks in the density field.
openaire   +1 more source