Results 31 to 40 of about 1,378 (187)

Detection of Multiple Phase Space Overdensities of GSE Stars by Orbit Integration

The Astrophysical Journal, 2023
In N -body simulations, nearly radial mergers can form shell-like overdensities in the sky position and phase space ( r − v _r ) due to the combination of dynamical friction and tidal stripping.
Wenbo Wu, Gang Zhao, Jiang Chang, Xiang-Xiang Xue, Yuqin Chen, Chengdong Li, Xianhao Ye, Chengqun Yang   +7 more
doaj   +1 more source

Grand challenges in Milky Way and galaxies [PDF]

Frontiers in Astronomy and Space Sciences, 2015
Extragalactic astronomy is a relatively young science. Its birth may be set at the time of the “greatdebate”betweenHarlowShapleyandHeberCurtisontheextragalacticnatureofthenebulae(whichculminated with a meeting of the two protagonists in April 1920) or, with a more conservativestance,afewyearslateratthetimeofEdwinHubble ...
openaire   +3 more sources

Testing the Weak Cosmic Censorship Conjecture via Test Particle–Induced Overcharging/Overspinning of Kerr–Newman–Modified Gravity Black Hole

Advances in Astronomy, Volume 2026, Issue 1, 2026.
We examine the weak cosmic censorship conjecture (WCCC) violation by throwing a charged and rotating test particle into a Kerr–Newman–modified gravity black hole (KN–MOG BH). The result depends on several factors, such as the relative sign of the particle’s charge and its direction of rotation with respect to black hole (BH).
Waqar Ahmad, Abdul Rehman Kashif, Jose Gaite   +2 more
wiley   +1 more source

Four-hundred Very Metal-poor Stars Studied with LAMOST and Subaru. III. Dynamically Tagged Groups and Chemodynamical Properties

The Astrophysical Journal
Very metal-poor (VMP) stars record the signatures of early accreted galaxies, making them essential tools for unraveling the early stages of Galaxy formation.
Ruizhi Zhang, Tadafumi Matsuno, Haining Li, Wako Aoki, Xiang-Xiang Xue, Takuma Suda, Gang Zhao, Yuqin Chen, Miho N. Ishigaki, Jianrong Shi, Qianfan Xing, Jingkun Zhao   +11 more
doaj   +1 more source

The R-Process Alliance: Chemodynamically Tagged Groups. II. An Extended Sample of Halo r-process-enhanced Stars

The Astrophysical Journal, 2023
Orbital characteristics based on Gaia Early Data Release 3 astrometric parameters are analyzed for ∼1700 r -process-enhanced (RPE; [Eu/Fe] > +0.3) metal-poor stars ([Fe/H] ≤ −0.8) compiled from the R -Process Alliance, the GALactic Archaeology with ...
Derek Shank, Timothy C. Beers, Vinicius M. Placco, Dmitrii Gudin, Thomas Catapano, Erika M. Holmbeck, Rana Ezzeddine, Ian U. Roederer, Charli M. Sakari, Anna Frebel, Terese T. Hansen   +10 more
doaj   +1 more source

Heavy Metal Contamination in Chocolates and Candies: Sources, Health Risks, and Analytical Insights

Journal of Chemistry, Volume 2026, Issue 1, 2026.
The presence of heavy metals in chocolates and candies poses growing public health concerns, particularly for children who are frequent consumers. This review consolidates evidence on the occurrence, sources, toxicological impacts, and analytical monitoring of metals, including Pb, Cd, Hg, As, Cr, Ni, and Al, in confectionery products.
Mahmood Ahmed, Maryam, Ali Abbas Aslam, Fatima Aftab, Ahmad Saeed, Mudassar Sanaullah, Muhammad Hassan, Riaz Hussain, Eisha Eiman, Masooma Irfan, Muhammad Yaseen, Muhammad Zaeem Mehdi, Sohini Basu Roy   +12 more
wiley   +1 more source

A Galactic Self-portrait: Density Structure and Integrated Properties of the Milky Way Disk

The Astrophysical Journal
The evolutionary history of the Milky Way disk is imprinted in the ages, positions, and chemical compositions of individual stars. In this study, we derive the intrinsic density distribution of different stellar populations using the final data release ...
Julie Imig, Jon A. Holtzman, Gail Zasowski, Jianhui Lian, Nicholas F. Boardman, Alexander Stone-Martinez, J. Ted Mackereth, Moire K. M. Prescott, Rachael L. Beaton, Timothy C. Beers, Dmitry Bizyaev, Michael R. Blanton, Katia Cunha, José G. Fernández-Trincado, Catherine E. Fielder, Sten Hasselquist, Christian R. Hayes, Misha Haywood, Henrik Jönsson, Richard R. Lane, Steven R. Majewski, Szabolcs Mészáros, Ivan Minchev, David L. Nidever, Christian Nitschelm, Jennifer Sobeck   +25 more
doaj   +1 more source

Clinically Inspired Multimodal Treatment Using Induced Neural Stem Cells‐Derived Exosomes Promotes Recovery of Traumatic Brain Injury through Microglial Modulation

Advanced Science, Volume 12, Issue 46, December 11, 2025.
This study explores the therapeutic potential of iNSC‐Exo via local and systemic delivery in TBI mice. It is found that iNSC‐Exo enhances NRXN signaling through Microglia_Nrg3 and Microglia_Rarb, effectively promoting functional and neurological recovery, suggesting a new therapeutic strategy for TBI. Abstract Traumatic brain injury (TBI) poses serious
Jiaojiao Li, Maoxiang Xu, Boyu Cai, Xiangyu Li, Zhanping Liang, Xiaohuan Xia, Haitao Zhang, Zhiwen Zhang, Fei Tan, Jialin Charlie Zheng   +9 more
wiley   +1 more source

Sex‐Specific Lasting Metabolome Effects of Adverse Gestational Conditions and Prevention by Myo‐Inositol Supplementation During Suckling

Molecular Nutrition &Food Research, Volume 69, Issue 23, December 2025.
This graphical abstract illustrates the effects of myo‐inositol supplementation during suckling in reducing long‐term metabolic impacts from mild gestational calorie restriction (GCR). Using a metabolomics approach, 164 metabolites were identified, with greater metabolic alterations in males.
Rocío A. Martín‐Chamorro, Jean‐Charles Martin, Pedro Castillo, Mariona Palou, Andreu Palou, Ana María Rodríguez, Catalina Picó   +6 more
wiley   +1 more source

Generalized Rotation Curves of the Milky Way from the GAIA DR3 Data Set: Constraints on Mass Models

The Astrophysical Journal
The circular velocity curve traced by stars provides a direct means of investigating the potential and mass distribution of the Milky Way. Recent measurements of the Galaxy’s rotation curve have revealed a significant decrease in velocity for Galactic ...
Francesco Sylos Labini
doaj   +1 more source