Results 61 to 70 of about 23,023 (219)

HST UV Spectroscopy of the Dwarf Starburst Galaxy Pox 186

The Astrophysical Journal, 2023
Studying the galaxies responsible for reionization is often conducted through local reionization-era analogs; however, many of these local analogs are too massive to be representative of the low-mass star-forming galaxies that are thought to play a ...
Noah S. J. Rogers, Claudia M. Scarlata, Evan D. Skillman, Nathan R. Eggen, Anne E. Jaskot, Vihang Mehta, John M. Cannon   +6 more
doaj   +1 more source

Cutoff and Emergence of Dart Leaders in an Unbranched Positive Leader Simulation

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract Channel cutoff is the process by which an active lightning channel cools down, goes dark, and loses its ability to effectively conduct electricity. Current cutoff precedes several lightning phenomena, notably dart leaders and return strokes, but the process by which a hot, highly‐conducting leader channel can undergo current cutoff is poorly ...
J. G. Pantuso, C. L. da Silva, D. P. Jensen, M. Stock, J. Wemhoner, S. Heckman, B. M. Hare, A. F. R. Leal, R. G. Sonnenfeld, O. Scholten, X.‐M. Shao   +10 more
wiley   +1 more source

The indirect influence of quasars on reionization [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2018
ABSTRACT The exact role of quasars during the Epoch of Reionization remains uncertain. With consensus leaning towards quasars producing a negligible amount of ionizing photons, we pose an alternate question: Can quasars indirectly contribute to reionization by allowing ionizing photons from stars to escape more easily?
Jacob Seiler, Anne Hutter, Manodeep Sinha, Darren Croton   +3 more
openaire   +3 more sources

The mean free path of hydrogen ionizing photons during the epoch of reionization [PDF]

, 2017
We use the Aurora radiation-hydrodynamical simulations to study the mean free path (MFP) for hydrogen ionizing photons during the epoch of reionization. We directly measure the MFP by averaging the distance 1 Ry photons travel before reaching an optical ...
Rahmati, Alireza, Schaye, Joop
core   +3 more sources

Therapeutic Implications of Biomolecular Corona on Lipid Nanoparticle‐Based Gene Delivery Systems

Small Science, Volume 5, Issue 9, September 2025.
This image illustrates the role of the biomolecular corona in lipid nanoparticles (LNPs), highlighting its impact on the stability, immune response, biodistribution, and targeted delivery. Formed after injection, the corona influences how LNPs circulate, interact with the cells, and modulate the immune response.
Antonietta Greco, Claudia Corbo
wiley   +1 more source

The Effect of Absorption Systems on Cosmic Reionization [PDF]

, 2012
We use large-scale simulations to investigate the morphology of reionization during the final, overlap phase. Our method uses an efficient three-dimensional smoothing technique which takes into account the finite mean free path due to absorption systems,
Abel, Abel, Alvarez, Busha, Das, Furlanetto, Gnedin, Gnedin, Haiman, Iliev, Komatsu, Lidz, Marcelo A. Alvarez, McQuinn, McQuinn, Mesinger, Mesinger, Miralda-Escudé, Prochaska, Reichardt, Shin, Songaila, Tom Abel, Trac, Zahn, Zahn   +25 more
core   +2 more sources

Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade

Radio Science, Volume 60, Issue 7, July 2025.
Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park, J. E. Riedel, N. Rodriguez‐Alvarez, M. Brozovic, L. A. M. Benner, P. Vergados, D. Buccino, C. S. Jacobs, L. S. Locke, S. W. Asmar, R. Castano, T. J. W. Lazio, J. Jao, C. Lee   +13 more
wiley   +1 more source

UV Radiative Feedback During the Advanced Stages of Reionization [PDF]

, 2008
The ionizing ultraviolet background (UVB) during reionization can suppress the gas content of low-mass galaxies, even those capable of efficient atomic cooling, and thus lead to an extended reionization epoch.
Andrei Mesinger, Barkana, Becker, Bolton, Bond, Bouwens, Chen, Choudhury, Choudhury, Dijkstra, Dijkstra, Dijkstra, Efstathiou, Fan, Furlanetto, Furlanetto, Furlanetto, Gnedin, Gnedin, Haiman, Haiman, Haiman, Hui, Iliev, Inoue, Kashikawa, Kitayama, Lidz, Lidz, Madau, Mark Dijkstra, Maselli, McQuinn, McQuinn, Mesinger, Mesinger, Mesinger, Mesinger, Mesinger, Mesinger, Miralda-Escudé, Onken, Schaerer, Shapiro, Shapiro, Shapley, Shimasaku, Siana, Somerville, Spergel, Stark, Stark, Storrie-Lombardi, Susa, Thoul, Thoul, Whalen, Wyithe, Wyithe, Wyithe, Yan, Yan, Zahn   +62 more
core   +2 more sources

MAYA (Multiple ActivitY Analyzer): An Open Access Tool to Explore Structure‐Multiple Activity Relationships in the Chemical Universe

Molecular Informatics, Volume 44, Issue 2, February 2025.
MAYA is an open chemical multiverse visualizer tool for the automated exploration of structure‐multiple activity relationships (SMARts). Abstract Herein, we introduce MAYA (Multiple Activity Analyzer), a tool designed to automatically construct a chemical multiverse, generating multiple visualizations of chemical spaces of a compound data set described
J. Israel Espinoza‐Castañeda, José L. Medina‐Franco   +1 more
wiley   +1 more source

Signatures of Stellar Reionization of the Universe [PDF]

The Astrophysical Journal, 1997
The high ionization level and universal metallicity (1% solar) of the intergalactic gas at redshifts z<5 implies that nonlinear structure had started to form in the universe at earlier times than we currently probe. In Cold Dark Matter (CDM) cosmologies, the first generation of baryonic objects emerges at redshifts z=10-50.
Haiman, Zoltan, Loeb, Abraham
openaire   +4 more sources