Results 101 to 110 of about 237,520 (386)

Indication of Another Intermediate-mass Black Hole in the Galactic Center [PDF]

Astrophysical Journal, 2018
We report the discovery of molecular gas streams orbiting around an invisible massive object in the central region of our Galaxy, based on the high-resolution molecular line observations with the Atacama Large Millimeter/submillimeter Array.
S. Takekawa, T. Oka, Y. Iwata, Shiho Tsujimoto, Mariko Nomura   +4 more
semanticscholar   +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

Gravitational Wave (GW) Classification, Space GW Detection Sensitivities and AMIGO (Astrodynamical Middle-frequency Interferometric GW Observatory)

EPJ Web of Conferences, 2018
After first reviewing the gravitational wave (GW) spectral classification. we discuss the sensitivities of GW detection in space aimed at low frequency band (100 nHz–100 mHz) and middle frequency band (100 mHz–10 Hz).
Ni Wei-Tou
doaj   +1 more source

Radio observations of NGC 6388: an upper limit on the mass of its central black hole

, 2010
We present the results of deep radio observations with the Australia Telescope Compact Array (ATCA) of the globular cluster NGC 6388. We show that there is no radio source detected (with a r.m.s. noise level of 27 uJy) at the cluster centre of gravity or
A. Tzioumis, B. Lanzoni, Bahcall, Bash, Baumgardt, Bondi, Clark, Clark, Corbel, Corbel, Corbel, D. Cseh, Dalessandro, De Rijcke, E. Körding, Falcke, Falcke, Falcke, Fender, Freire, Fryer, Gallo, Gebhardt, Gebhardt, Grindlay, Gültekin, Gürkan, Jenkins, Kaaret, Kaaret, Kong, Körding, Körding, Lanzoni, M. Coriat, Maccarone, Maccarone, Maccarone, Maccarone, Merloni, Meylan, Miller, Miocchi, Moretti, Nucita, P. Kaaret, Pellegrini, Perna, Pooley, Portegies Zwart, Portegies Zwart, S. Corbel, Sault, Scott, Silk, Skrutskie, Trudolyubov, Ulvestad, Weisskopf, Zampieri   +59 more
core   +1 more source

Evidence for an intermediate-mass black hole in the globular cluster NGC 6624 [PDF]

, 2017
PSR B1820−30A is located in the globular cluster NGC 6624 and is the closest known pulsar to the centre of any globular cluster. We present more than 25 yr of high-precision timing observations of this millisecond pulsar and obtain four rotational ...
B. Perera, B. Stappers, A. Lyne, C. Bassa, I. Cognard, I. Cognard, L. Guillemot, L. Guillemot, Michael Kramer, Michael Kramer, G. Theureau, G. Theureau, G. Theureau, G. Desvignes   +13 more
semanticscholar   +1 more source

A Catalog of Hyper-luminous X-Ray Sources and Intermediate-mass Black Hole Candidates out to High Redshifts [PDF]

Astrophysical Journal, 2019
Hyper-luminous X-ray sources (HLXs; LX > 1041 erg s−1) are off-nuclear X-ray sources in galaxies and strong candidates for intermediate-mass black holes (IMBHs).
R. Barrows, M. Mezcua, J. Comerford
semanticscholar   +1 more source

Integration of Perovskite/Low‐Dimensional Material Heterostructures for Optoelectronics and Artificial Visual Systems

Advanced Functional Materials, EarlyView.
Heterojunctions combining halide perovskites with low‐dimensional materials enhance optoelectronic devices by enabling precise charge control and improving efficiency, stability, and speed. These synergies advance flexible electronics, wearable sensors, and neuromorphic computing, mimicking biological vision for real‐time image analysis and intelligent
Yu‐Jin Du, Junjie Yang, Ziyu Lv, Yongbiao Zhai, Zezhuang Yi, Yuhui Xie, Ming‐Lin Zheng, Xiangyu Ma, Guodong Gong, Yan Wang, Ye Zhou, Su‐Ting Han   +11 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

Synchronizing the EMRIs and IMRIs in AGN Accretion Disks

The Astrophysical Journal, 2023
Extreme-mass-ratio inspirals (EMRIs) and intermediate-mass-ratio inspirals (IMRIs) are important gravitational-wave (GW) sources for the Laser Interferometer Space Antenna (LISA).
Peng Peng, Xian Chen
doaj   +1 more source

The need for a second black hole at the Galactic center

, 2003
Deep infra-red observations and long-term monitoring programs have provided dynamical evidence for a supermassive black hole of mass 3.e6 solar masses associated with the radio source Sagitarrius A* at the center of our Galaxy.
Brad M. S. Hansen, Eckart A., Genzel R., Milo Milosavljevi   +3 more
core   +1 more source