Results 41 to 50 of about 33,018 (264)

The high energy X-ray probe (HEX-P): bringing the cosmic X-ray background into focus

open access: yesFrontiers in Astronomy and Space Sciences
Since the discovery of the cosmic X-ray background (CXB), astronomers have strived to understand the accreting supermassive black holes (SMBHs) contributing to its peak in the 10–40 keV band.
F. Civano   +40 more
doaj   +1 more source

ABL kinase‐dependent phosphorylation of SH proteins promotes their direct interaction with CRK family SH2 domains

open access: yesFEBS Letters, EarlyView.
CT10 regulator of kinase (CRK) and CRK‐Like (CRKL) are signaling adaptors driving cell adhesion, motility, differentiation, and proliferation. SH2‐domain containing (SH) proteins are enriched in YXXP motifs which when phosphorylated create preferred binding sites for CRK family SH2 domains.
Phoebe M. Cousens   +8 more
wiley   +1 more source

Cosmological Evolution of the Central Engine in High-Luminosity, High-Accretion Rate AGN

open access: yesActa Polytechnica CTU Proceedings, 2014
In this paper I discuss the status of observational studies aiming at probing the cosmological evolution of the central engine in high-luminosity, high-accretion rate Active Galactic Nuclei (AGN). X-ray spectroscopic surveys, supported by extensive multi-
Matteo Guainazzi
doaj   +1 more source

The Final Season Reimagined: 30 Tidal Disruption Events from the ZTF-I Survey

open access: yesThe Astrophysical Journal, 2022
Tidal disruption events (TDEs) offer a unique way to study dormant black holes. While the number of observed TDEs has grown thanks to the emergence of wide-field surveys in the past few decades, questions regarding the nature of the observed optical, UV,
Erica Hammerstein   +32 more
doaj   +1 more source

Conserved binding mode but diverse interfaces of MreC‐PBP2 interactions

open access: yesFEBS Letters, EarlyView.
The crystal structure of abMreC reveals a conserved two β‐barrel architecture and provides structural insights into its role within the bacterial elongasome. The abMreC–abPBP2 complex model identifies the molecular basis of MreC‐mediated PBP2 recognition, contributing to the regulation of peptidoglycan synthesis.
Hyunseok Jang   +4 more
wiley   +1 more source

A Markedly Expanded Sample of Candidate X-Ray-emitting Isolated Neutron Stars

open access: yesThe Astrophysical Journal
The current sample of 12 radio-quiet isolated neutron stars that emit strongly in X-rays (XINSs) is both small and heterogeneous, limiting its usefulness for understanding the physics of neutron star atmospheres and cooling rates and for constraining the
Sebastian Demasi   +2 more
doaj   +1 more source

Population of X-Ray Sources in the Intermediate-age Cluster NGC 3532: a Test Bed for Machine-learning Classification

open access: yesThe Astrophysical Journal, 2023
Open clusters are thought to be the birthplace of most stars in the galaxy. Thus, they are excellent laboratories for investigating stellar evolution, and X-ray properties of various types of stars (including binary stars, evolved stars, and compact ...
Steven Chen   +6 more
doaj   +1 more source

THE X-RAY BACKGROUND AND THE ROSAT DEEP SURVEYS [PDF]

open access: yesExploring the Universe, 2000
To be published in: Festschrift for R. Giacconi's 65th birthday, World Scientific Publishing Co., H. Gursky, R. Ruffini, L. Stella eds.
Hasinger, Guenther, Zamorani, Gianni
openaire   +2 more sources

Emerging experimental and computational methods for studying redox‐regulated structural transitions

open access: yesFEBS Letters, EarlyView.
Redox reactions can reshape proteins and alter how they behave in cells, with important consequences for health and disease. This review explores emerging experimental and computational approaches for discovering these redox‐sensitive protein switches, revealing their structural effects, and predicting their behavior, opening new opportunities to ...
Tasneem Rass   +2 more
wiley   +1 more source

Testing X-ray selection effects with four rich, yet X–ray–faint, galaxy clusters

open access: yesAstronomy & Astrophysics
A robust understanding of selection effects in galaxy cluster studies is crucial for both astrophysical and cosmological applications. Examining clusters identified through different observational strategies, even in small numbers, helps to illuminate ...
Andreon S., Moretti A.
doaj   +1 more source

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