Results 111 to 120 of about 103,015 (280)

Cosmology with Gravitational Waves: A Review

Annalen der Physik, Volume 536, Issue 2, February 2024.
The review gives an overview of the most recent advances in gravitational‐wave (GWs) cosmology. After an in‐depth discussion of methodologies and tools for GW cosmology, it presents the latest results on measurements of standard cosmological parameters from the LIGO, Virgo, and KAGRA detections.
Simone Mastrogiovanni, Christos Karathanasis, Jonathan Gair, Gregory Ashton, Stefano Rinaldi, Hsiang‐Yu Huang, Gergely Dálya   +6 more
wiley   +1 more source

The Physical Conditions of Emission-line Galaxies at Cosmic Dawn from JWST/NIRSpec Spectroscopy in the SMACS 0723 Early Release Observations

The Astrophysical Journal, 2023
We present rest-frame optical emission-line flux ratio measurements for five z > 5 galaxies observed by the James Webb Space Telescope Near-Infared Spectrograph (NIRSpec) in the SMACS 0723 Early Release Observations.
Jonathan R. Trump, Pablo Arrabal Haro, Raymond C. Simons, Bren E. Backhaus, Ricardo O. Amorín, Mark Dickinson, Vital Fernández, Casey Papovich, David C. Nicholls, Lisa J. Kewley, Samantha W. Brunker, John J. Salzer, Stephen M. Wilkins, Omar Almaini, Micaela B. Bagley, Danielle A. Berg, Rachana Bhatawdekar, Laura Bisigello, Véronique Buat, Denis Burgarella, Antonello Calabrò, Caitlin M. Casey, Laure Ciesla, Nikko J. Cleri, Justin W. Cole, M. C. Cooper, Asantha R. Cooray, Luca Costantin, Darren Croton, Henry C. Ferguson, Steven L. Finkelstein, Seiji Fujimoto, Jonathan P. Gardner, Eric Gawiser, Mauro Giavalisco, Andrea Grazian, Norman A. Grogin, Nimish P. Hathi, Michaela Hirschmann, Benne W. Holwerda, Marc Huertas-Company, Taylor A. Hutchison, Shardha Jogee, Stéphanie Juneau, Intae Jung, Jeyhan S. Kartaltepe, Allison Kirkpatrick, Dale D. Kocevski, Anton M. Koekemoer, Jennifer M. Lotz, Ray A. Lucas, Benjamin Magnelli, Jasleen Matharu, Pablo G. Pérez-González, Nor Pirzkal, Marc Rafelski, Caitlin Rose, Lise-Marie Seillé, Rachel S. Somerville, Amber N. Straughn, Sandro Tacchella, Brittany N. Vanderhoof, Benjamin J. Weiner, Stijn Wuyts, L. Y. Aaron Yung, Jorge A. Zavala   +65 more
doaj   +1 more source

IS THERE A MAXIMUM STAR FORMATION RATE IN HIGH-REDSHIFT GALAXIES?,,, [PDF]

, 2014
We use the James Clerk Maxwell Telescope's SCUBA-2 camera to image a 400 arcmin2 area surrounding the GOODS-N field. The 850 μm rms noise ranges from a value of 0.49 mJy in the central region to 3.5 mJy at the outside edge.
A. Barger, A. Barger, L. Cowie, Chian-Chou Chen, Chian-Chou Chen, F. Owen, Wei-hao Wang, C. Casey, C. Casey, N. Lee, D. Sanders, Jonathan P. Williams   +11 more
semanticscholar   +1 more source

Stratified learning: A general‐purpose statistical method for improved learning under covariate shift

Statistical Analysis and Data Mining: The ASA Data Science Journal, Volume 17, Issue 1, February 2024.
Abstract We propose a simple, statistically principled, and theoretically justified method to improve supervised learning when the training set is not representative, a situation known as covariate shift. We build upon a well‐established methodology in causal inference and show that the effects of covariate shift can be reduced or eliminated by ...
Maximilian Autenrieth, David A. van Dyk, Roberto Trotta, David C. Stenning   +3 more
wiley   +1 more source

Searches for High Redshift Radio Galaxies [PDF]

, 1998
6 pages Latex, including 3 figures, To appear in the "Observational Cosmology with the New Radio Surveys" Conference - Tenerife 13 - 15 January ...
De Breuck, C., Van Breugel, W., Rottgering, H., Miley, G.   +3 more
openaire   +3 more sources

Colors of Radio Galaxies at High Redshifts [PDF]

Symposium - International Astronomical Union, 1982
In this paper we present the first results of the Westerbork-Berkeley Deep Survey, the purpose of which is to derive the epoch dependence of the radio luminosity function (RLF) and the optical spectral energy distribution (SED) of elliptical radio galaxies. From calibrated photographic photometry we conclude that no spectral evolution is seen for z ≲ 0.
P. Katgert, R. G. Kron, Rogier A. Windhorst, David C. Koo   +3 more
openaire   +3 more sources

Late-time growth weakly affects the significance of high-redshift massive galaxies

The Open Journal of Astrophysics
Recent observations by the James Webb Space Telescope have revealed massive galaxies at very high redshift ($z\simeq 7-15$). The question of whether the existence of such galaxies is expected in the corresponding JWST surveys has received a lot of ...
Qianran Xia, Dragan Huterer, Nhat-Minh Nguyen   +2 more
doaj   +1 more source

Inkjet Printed Photonic Cellulose Nanocrystal Patterns

Advanced Materials, Volume 36, Issue 1, January 4, 2024.
Patterned arrays of photonic cellulose nanocrystal microfilms are prepared by inkjet printing. By dispensing directly through an oil layer, the printing and drying processes can be decoupled, which avoids the coffee stain effect and enables complex arrays to be produced.
Cyan A. Williams, Richard M. Parker, Andrew Kyriacou, Maria Murace, Silvia Vignolini   +4 more
wiley   +1 more source

CONTAMINATION OF BROADBAND PHOTOMETRY BY NEBULAR EMISSION IN HIGH-REDSHIFT GALAXIES: INVESTIGATIONS WITH KECK'S MOSFIRE NEAR-INFRARED SPECTROGRAPH [PDF]

, 2013
Earlier work has raised the potential importance of nebular emission in the derivation of the physical characteristics of high-redshift Lyman break galaxies.
M. Schenker, R. Ellis, N. Konidaris, D. Stark   +3 more
semanticscholar   +1 more source

Creation Field Cosmological Model with Variable Cosmological Term (Λ) in Bianchi Type III Space‐Time

Advances in High Energy Physics, Volume 2024, Issue 1, 2024.
The paper is devoted to the study of cosmological models with time‐varying cosmological term (Λ) in the presence of creation field in the framework of Bianchi type III space‐time. To obtain deterministic model of the universe, we have assumed Λ ∝ 1/R3, where R is the scale factor, for steady state cosmology and creation field, and shear (σ) is ...
Raj Bali, Seema Saraf, Donato Nicolo
wiley   +1 more source