Results 41 to 50 of about 163,915 (293)

Mass Measurements of Stellar and Intermediate-Mass Black Holes [PDF]

Space Science Reviews, 2013
28 pages, 12 figures. Accepted for publication in Space Science Reviews (DOI 10.1007/s11214-013-0030-6). Also to appear in hard cover in the Space Sciences Series of ISSI "The Physics of Accretion onto Black Holes" (Springer Publisher).
Casares, J., Jonker, P.G.
openaire   +6 more sources

GW231123: Likely a Product of Successive Mergers from ∼10 Stellar-mass Black Holes

The Astrophysical Journal
GW231123 is an exceptionally massive binary black hole (BBH) merger with unusually high component spins. Such extreme properties challenge conventional stellar evolution models, predicting a black hole (BH) mass gap due to pair-instability supernovae. We
Yin-Jie Li, Shao-Peng Tang, Ling-Qin Xue, Yi-Zhong Fan   +3 more
doaj   +1 more source

Understanding and Optimizing Li Substitution in P2‐Type Sodium Layered Oxides for Sodium‐Ion Batteries

Advanced Functional Materials, EarlyView.
This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous 
Mingfeng Xu, Giovanni Gammaitoni, Michael Häfner, Eduardo Villalobos‐Portillo, Carlo Marini, Matteo Bianchini   +5 more
wiley   +1 more source

Near-infrared Variability Detected in the Young Star-forming Dwarf Galaxy SBS 0335-052E

The Astrophysical Journal
SBS 0335-052E is a young star-forming dwarf galaxy with a total stellar mass of M _*  ≲ 10 ^8 M _⊙ and an extremely low metallicity ( Z  ∼ 1/40 Z _⊙ ), which has long been considered to be devoid of an active galactic nucleus (AGN).
Shun Hatano, Mitsuru Kokubo, Masami Ouchi, Kimihiko Nakajima, Toshihiro Kawaguchi, Satoshi Kikuta, Nozomu Tominaga, Yi Xu, Kuria Watanabe, Yuichi Harikane, Yuki Isobe, Akinori Matsumoto, Moka Nishigaki, Yoshiaki Ono, Masato Onodera, Yuma Sugahara, Hiroya Umeda, Yechi Zhang, Ryotaro Chiba, Takashi J. Moriya   +19 more
doaj   +1 more source

An intermediate‐mass black hole candidate in M51? [PDF]

Astronomische Nachrichten, 2016
AbstractWe present the current results of an investigation into M51 ULX‐7, using archival data from XMM‐Newton, Chandra and NuSTAR, and optical and radio data from HST and VLA. The source has a consistently hard power‐law X‐ray spectrum and high short‐term variability.
openaire   +3 more sources

Enhancing Low‐Temperature Performance of Sodium‐Ion Batteries via Anion‐Solvent Interactions

Advanced Functional Materials, EarlyView.
DOL is introduced into electrolytes as a co‐solvent, increasing slat solubility, ion conductivity, and the de‐solvent process, and forming an anion‐rich solvent shell due to its high interaction with anion. With the above virtues, the batteries using this electrolyte exhibit excellent cycling stability at low temperatures. Abstract Sodium‐ion batteries
Cheng Zheng, Qian Yao, Yanan Sun, Hongyu Lv, Zhongchao Bai, Guoliang Zhang, Nana Wang, Jian Yang   +7 more
wiley   +1 more source

The Intermediate-mass Black Hole Reverberation Mapping Project: First Detection of Mid-infrared Lags in Prototypical Intermediate-mass Black Holes in NGC 4395 and POX 52

The Astrophysical Journal Letters
The search for robust evidence of intermediate-mass black holes (IMBHs) is crucial for understanding the black hole seeding process and the formation of supermassive black holes in the early Universe.
Jingbo Sun, Hengxiao Guo, Wenwen Zuo, Paulina Lira, Minfeng Gu, Philip G. Edwards, Shu Wang, Jamie Stevens, Tao An, Samuzal Barua, Zhen-yi Cai, Haicheng Feng, Alok C. Gupta, Luis C. Ho, Dragana Ilić, Andjelka B. Kovačević, ShaSha Li, Mar Mezcua, Luka Č. Popović, Paula Sánchez-Sáez, Mouyuan Sun, Rongfeng Shen, Vivian U, Oliver Vince, Junxian Wang, Xuebing Wu, Zhefu Yu, Zhenya Zheng   +27 more
doaj   +1 more source

Photoswitching Conduction in Framework Materials

Advanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez, Stefan Hecht, Wolfgang Wenzel, Lars Heinke, Mariana Kozlowska   +4 more
wiley   +1 more source

Interpretable Machine Learning for Finding Intermediate-mass Black Holes

The Astrophysical Journal
Definitive evidence that globular clusters (GCs) host intermediate-mass black holes (IMBHs) is elusive. Machine-learning (ML) models trained on GC simulations can in principle predict IMBH host candidates based on observable features.
Mario Pasquato, Piero Trevisan, Abbas Askar, Pablo Lemos, Gaia Carenini, Michela Mapelli, Yashar Hezaveh   +6 more
doaj   +1 more source

Deeper, Wider, Sharper: Next-Generation Ground-Based Gravitational-Wave Observations of Binary Black Holes [PDF]

, 2019
Next-generation observations will revolutionize our understanding of binary black holes and will detect new sources, such as intermediate-mass black holes.
Berry, Christopher P L, Colpi, Monica, Fairhurst, Steve, Justham, Stephen, Kalogera, Vassiliki, Mandel, Ilya, Mangiagli, Alberto, Mapelli, Michela, Mills, Cameron, Sathyaprakash, B. S., Schneider, Raffaella, Tauris, Thomas, Valiante, Rosa   +12 more
core   +1 more source