Results 71 to 80 of about 442,368 (316)

Prospects for 21 cm Galaxy Cross-correlations with HERA and the Roman High-latitude Survey

The Astrophysical Journal, 2023
The cross-correlation between the 21 cm field and the galaxy distribution is a potential probe of the Epoch of Reionization (EoR). The 21 cm signal traces neutral gas in the intergalactic medium and, on large spatial scales, this should be anticorrelated
Paul La Plante, Jordan Mirocha, Adélie Gorce, Adam Lidz, Aaron Parsons   +4 more
doaj   +1 more source

Magnetic Fields in the Large-Scale Structure of the Universe [PDF]

, 2011
Magnetic fields appear to be ubiquitous in astrophysical environments. Their existence in the intracluster medium is established through observations of synchrotron emission and Faraday rotation.
D. Ryu, D. Schleicher, R. Treumann, C. Tsagas, L. Widrow   +4 more
semanticscholar   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Observed Evidence for the Primordial Origin of Galaxy Sizes

The Astrophysical Journal
We present observational evidence supporting the scenario that the protogalactic angular momenta play an important role in molding the optical sizes of present galaxies. Analyzing the NASA-Sloan Atlas catalog in the redshift range of 0.02 ≤ z  
Jun-Sung Moon, Jounghun Lee
doaj   +1 more source

Simulating emission line galaxies for the next generation of large-scale structure surveys [PDF]

Monthly notices of the Royal Astronomical Society
We investigate emission line galaxies across cosmic time by combining the modified L-Galaxies semi-analytical galaxy formation model with the JiuTian cosmological simulation.
Wenxiang Pei, Qi Guo, Ming Li, Qiao Wang, Jiaxin Han, Jia Hu, Tong Su, Liang Gao, Jie Wang, Yu Luo, Chengliang Wei   +10 more
semanticscholar   +1 more source

Primordial non-Gaussianity in the Large Scale Structure of the Universe [PDF]

, 2010
Primordial non-Gaussianity is a potentially powerful discriminant of the physical mechanisms that generated the cosmological fluctuations observed today.
V. Desjacques, U. Seljak
semanticscholar   +1 more source

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

A New Wavelet Scattering Transform-based Statistic for Cosmological Analysis of Large-scale Structure

The Astrophysical Journal
Large-scale structure (LSS) analysis in galaxy surveys is a powerful cosmological probe but is limited by tracer bias, which can obscure underlying information and weaken parameter constraints.
Zhujun Jiang, Xiaolin Luo, Wenying Du, Zhiwei Min, Fenfen Yin, Longlong Feng, Jiacheng Ding, Le Zhang, Xiao-Dong Li   +8 more
doaj   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Spurious Correlations between Galaxies and Multiepoch Image Stacks in the DESI Legacy Surveys

The Astrophysical Journal Supplement Series, 2023
A nonnegligible source of systematic bias in cosmological analyses of galaxy surveys is the on-sky modulation that is caused by foregrounds and variable image characteristics, such as observing conditions.
Edgar Eggert, Boris Leistedt
doaj   +1 more source