Results 41 to 50 of about 511 (183)

Two Micron‐Size Dark Dimensions

Fortschritte der Physik, Volume 73, Issue 8, August 2025.
Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui, Ignatios Antoniadis, Dieter Lüst   +2 more
wiley   +1 more source

The JADES Origins Field: A New JWST Deep Field in the JADES Second NIRCam Data Release

The Astrophysical Journal Supplement Series
We summarize the properties and initial data release of the JADES Origins Field (JOF), the longest single pointing yet imaged with the James Webb Space Telescope (JWST).
Daniel J. Eisenstein, Benjamin D. Johnson, Brant Robertson, Sandro Tacchella, Kevin Hainline, Peter Jakobsen, Roberto Maiolino, Nina Bonaventura, Andrew J. Bunker, Alex J. Cameron, Phillip A. Cargile, Emma Curtis-Lake, Ryan Hausen, Dávid Puskás, Marcia Rieke, Fengwu Sun, Christopher N. A. Willmer, Chris Willott, Stacey Alberts, Santiago Arribas, William M. Baker, Stefi Baum, Rachana Bhatawdekar, Stefano Carniani, Stephane Charlot, Zuyi Chen, Jacopo Chevallard, Mirko Curti, Christa DeCoursey, Francesco D’Eugenio, Anna de Graaff, Eiichi Egami, Jakob M. Helton, Zhiyuan Ji, Gareth C. Jones, Nimisha Kumari, Nora Lützgendorf, Isaac Laseter, Tobias J. Looser, Jianwei Lyu, Michael V. Maseda, Erica Nelson, Eleonora Parlanti, Bernard J. Rauscher, Tim Rawle, George Rieke, Hans-Walter Rix, Wiphu Rujopakarn, Lester Sandles, Aayush Saxena, Jan Scholtz, Katherine Sharpe, Irene Shivaei, Charlotte Simmonds, Renske Smit, Michael W. Topping, Hannah Übler, Giacomo Venturi, Christina C. Williams, Joris Witstok, Charity Woodrum   +60 more
doaj   +1 more source

Temporal Variability of the Northern Infrared Aurora of Jupiter as Captured by JWST

Journal of Geophysical Research: Space Physics, Volume 130, Issue 8, August 2025.
Abstract We present near‐infrared observations of the northern aurora of Jupiter using the NIRSpec instrument on the James Webb Space Telescope, mapping emissions from H3+ ${\mathrm{H}}_{3}^{+}$ and CH4 ${\text{CH}}_{4}$ across the polar region. The data were acquired over a period of ∼ ${\sim} $4 hr, providing a temporally averaged view of these ...
Henrik Melin, Tom S. Stallard, James O’Donoghue, Luke Moore, Paola I. Tiranti, Katie L. Knowles, Thomas K. Greathouse, Manuel López‐Puertas, Matthew J. Rutala, Rosie Johnson, Emma Thomas   +10 more
wiley   +1 more source

Constraints on the Faint End of the Galaxy Stellar Mass Function at z ≃ 4–8 from Deep JWST Data

The Astrophysical Journal
We analyze a sample of 3300 galaxies between redshifts z ≃ 3.5 and z ≃ 8.5 selected from James Webb Space Telescope (JWST) images in the Hubble Ultra Deep Field and UKIDSS Ultra Deep Survey field, including objects with stellar masses as low as ≃10 ^8 M ...
Rafael Navarro-Carrera, Pierluigi Rinaldi, Karina I. Caputi, Edoardo Iani, Vasily Kokorev, Sophie E. van Mierlo   +5 more
doaj   +1 more source

Radiation Hardened Infrared Photodetectors Based on a Narrow Bandgap Conjugated Polymer Semiconductor

Advanced Electronic Materials, Volume 11, Issue 11, July 2025.
A blackbody‐sensitive infrared photodetector comprised of an open‐shell conjugated polymer demonstrates high sensitivity without cooling and exceptional radiation hardness, surpassing inorganic compound semiconductor devices. This functionality, inherent to the polymer semiconductor, provides a new frontier for low‐cost, size, weight, and power space ...
Anthony R. Benasco, Chih‐Ting Liu, Bernie Rax, Giacomo Mariani, Steve McClure, Tyler Bills, Sanyukta Datta Gupta, Mohammad I. Vakil, Stefan Nikodemski, Jarrett H. Vella, Jason D. Azoulay   +10 more
wiley   +1 more source

Glimmers in the Cosmic Dawn: A Census of the Youngest Supermassive Black Holes by Photometric Variability

The Astrophysical Journal Letters
We report the first results from a deep near-infrared campaign with the Hubble Space Telescope to obtain late-epoch images of the Hubble Ultra Deep Field, 10–15 yr after the first epoch data were obtained.
Matthew J. Hayes, Jonathan C. Tan, Richard S. Ellis, Alice R. Young, Vieri Cammelli, Jasbir Singh, Axel Runnholm, Aayush Saxena, Ragnhild Lunnan, Benjamin W. Keller, Pierluigi Monaco, Nicolas Laporte, Jens Melinder   +12 more
doaj   +1 more source

Christian Bohr. Discoverer of Homotropic and Heterotopic Allostery

Acta Physiologica, Volume 241, Issue S734, July 2025.
ABSTRACT This essay recounts and revisits the scientific contributions of Christian Bohr, highlighting his pivotal role in discovering allostery about 120 years ago. Bohr's meticulous experimentation led to identifying two distinct forms of allostery: homotropic (single‐ligand) and heterotropic (multi‐ligand), the latter widely recognized as the Bohr ...
Niels Bindslev
wiley   +1 more source

NGDEEP Epoch 1: Spatially Resolved Hα Observations of Disk and Bulge Growth in Star-forming Galaxies at z ∼ 0.6–2.2 from JWST NIRISS Slitless Spectroscopy

The Astrophysical Journal Letters
We study the H α equivalent width (EW(H α )) maps of 19 galaxies at 0.6 < z < 2.2 in the Hubble Ultra Deep Field using NIRISS slitless spectroscopy as part of the Next Generation Deep Extragalactic Exploratory Public Survey.
Lu Shen, Casey Papovich, Jasleen Matharu, Nor Pirzkal, Weida Hu, Bren E. Backhaus, Micaela B. Bagley, Yingjie Cheng, Nikko J. Cleri, Steven L. Finkelstein, Marc Huertas-Company, Mauro Giavalisco, Norman A. Grogin, Intae Jung, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Jennifer M. Lotz, Michael V. Maseda, Pablo G. Pérez-González, Barry Rothberg, Raymond C. Simons, Sandro Tacchella, Christina C. Williams, L. Y. Aaron Yung   +23 more
doaj   +1 more source

Dark Energy From the Gravitational Wave Background With Scalar Field Dark Matter

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT Recent observational results, such as those from pulsar timing arrays (PTA), suggest a low‐frequency Gravitational Wave Background (GWB) permeates our universe. This opens the possibility that gravitational waves could span a broader spectrum, potentially impacting cosmological scales.
Edwin L. Pérez‐Ochoa, Tonatiuh Matos
wiley   +1 more source

The Plasma Proton Environment Within Saturn's F‐G Ring Gap as Observed by the Cassini Plasma Spectrometer Ion Mass Spectrometer During Saturn Orbit Insertion

Journal of Geophysical Research: Space Physics, Volume 130, Issue 2, February 2025.
Abstract We report on the detection of protons and the potential detection of H2+ between Saturn's F and G rings based on Cassini Plasma Spectrometer (CAPS) Ion Mass Spectrometer (IMS) time‐of‐flight (TOF) composition measurements acquired during Saturn Orbit Insertion (SOI) outbound pass. The range in dipole L shell is 2.3 < L < 2.8.
E. C. Sittler Jr., A. K. Woodson, R. E. Johnson, J. F. Cooper, W.‐L. Tseng, S. J. Sturner, D. J. Chornay, H. T. Smith, D. G. Simpson, D. B. Reisenfeld   +9 more
wiley   +1 more source