Results 121 to 130 of about 5,354 (289)

Area of Ignorance in Stellar Physics: Stellar Mass Black Hole Distribution; Lowest Initial Progenitor Mass Limit for Black Hole Evolution [PDF]

The creation and evolution of black holes have been the subject of ongoing debate and investigation due to their elusive nature, specifically in the mass distribution of stellar mass black holes. Using data and observations of changes in the remnant mass
Tomar, Aria, Margutti, Raffaella
core   +1 more source

A short review of relativistic iron lines from stellar-mass black holes [PDF]

, 2006
In this contribution, I briefly review recent progress in detecting and measuring the properties of relativistic iron lines observed in stellar-mass black hole systems, and the aspects of these lines that are most relevant to studies of similar lines in ...
Miller, J. M., J. M. Miller
core   +1 more source

Phase Engineering of Nanomaterials (PEN): Evolution, Current Challenges, and Future Opportunities

Advanced Materials, EarlyView.
This review summarizes the synthesis, phase transition, advanced characterization spanning ex situ to in situ and operando techniques, and diverse applications of phase engineering of nanomaterials (PEN). It further outlines key challenges and future opportunities, such as phase stability, architecture control, and artificial intelligence (AI)‐driven ...
Ye Chen, Zhanxi Fan, Jingjie Ge, Qiyuan He, Zhuangchai Lai, Jiawei Liu, Chaoliang Tan, Hua Zhang   +7 more
wiley   +1 more source

Mass Segregation and Transient Formation in Nuclear Stellar Clusters

The Astrophysical Journal
Supermassive black holes at the centers of galaxies occasionally disrupt stars or consume stellar-mass black holes (BHs) that wander too close, producing observable electromagnetic or gravitational wave signals.
Barak Rom, Re’em Sari
doaj   +1 more source

Robust active galactic nucleus and host-galaxy decomposition in optical spectral fitting

Astronomy & Astrophysics
Unraveling the growth of supermassive black holes and their connection to host galaxies requires disentangling the active galactic nuclei (AGN) emission from that of the stellar populations in which they are embedded.
Aydar C., Merloni A., Zeltyn G., Andonie C., Trakhtenbrot B., Bernal S., Wu Q., Buchner J., Salvato M., Dwelly T., Anderson S. F., Assef R. J., Bauer F. E., Brandt W. N., LaMassa S., Martínez-Aldama M. L., Rankine A. L., Schneider D. P., Shen Y., Brownstein J. R., Javier Ibarra-Medel H., Koekemoer A. M., Krumpe M., Morrison S., Nandra K., Negrete Peñaloza C. A., Sanchez S. F.   +26 more
doaj   +1 more source

Advancing Lithium–Oxygen Batteries: Pioneering Cathode Catalyst Innovation and Artificial Intelligence‐Driven Design Paradigms

Advanced Materials, EarlyView.
This review summarizes the principles and challenges of nonaqueous lithium‐oxygen batteries and recent advances in cathode catalysts, including carbon‐based materials, metals, oxides, sulfides, nitrides, carbides, and redox mediators. It highlights emerging design strategies and artificial intelligence‐driven approaches, emphasizing data‐assisted ...
Yuqing Yao, Chongyang Hao, Karol Viviana Mejia‐Centeno, Malik Dilshad Khan, Shang Wang, Longqiu Li, Yanhong Tian, Andreu Cabot, Qing Sun   +8 more
wiley   +1 more source

Coevolution of Nuclear Star Clusters and Massive Black Holes: Extreme-mass-ratio Inspirals

The Astrophysical Journal
We explore extreme-mass-ratio inspirals (EMRIs) in the coevolution of massive black holes (MBHs) and nuclear star clusters (NSCs), which host diverse stellar populations across a wide range of masses. The dynamics are simulated self-consistently with GNC
Fupeng Zhang, Pau Amaro Seoane
doaj   +1 more source

Nonlocal Metaspire: A Scalable Elastic Material Platform With Decoupled Mechanical Modes

Advanced Materials, EarlyView.
Nonlocal Metaspire introduces sequential rotation to realize wider scalability in implementing complex nonlocal couplings in elastic metamaterials while suppressing unintended mode coupling. Numerical results clarify the underlying wave motions, demonstrate mode‐decoupled roton and maxon formation, and support a straightforward extension to higher ...
Seung Han Kim, Myung Hwan Bae, Ye Jeong Shin, Joo Hwan Oh   +3 more
wiley   +1 more source

Mechanical Stress Evolution in Polycrystalline Ge Thin Films Under MeV Ion Irradiation

Advanced Materials Interfaces, EarlyView.
Irradiation of polycrystalline Ge thin films with 1.8 MeV Au ions alters residual stress through defect generation and lattice expansion. Increasing fluence drives progressive lattice disorder and eventual amorphization. Polycrystalline Ge resists amorphization longer than crystalline Ge, as grain boundaries facilitate defect diffusion, significantly ...
Karla J. Paz Corrales, Aaron Reupert, Kevin Lubig, Frank A. Müller, Berit Marx‐Glowna, Ralf Röhlsberger, Till Weickhardt, Giancarlo Soavi, Martin Hafermann, Elke Wendler, Carsten Ronning   +10 more
wiley   +1 more source

Exploring the Evolution of a Dwarf Spheroidal Galaxy with SPH Simulations. II. AGN Feedback

The Astrophysical Journal
We investigate active galactic nucleus (AGN) feedback from an intermediate-mass black hole at the center of a dwarf spheroidal galaxy, by performing isolated galaxy simulations using a modified version of the GADGET-3 code. We consider Leo II (PGC 34176)
Roberto Hazenfratz, Paramita Barai, Gustavo A. Lanfranchi, Anderson Caproni   +3 more
doaj   +1 more source