Results 111 to 120 of about 43,779 (305)
A Comparison of Intermediate-Mass Black Hole Candidate Ultraluminous X-Ray Sources and Stellar-Mass Black Holes [PDF]
, 2004 Cool thermal emission components have recently been revealed in the X-ray spectra of a small number of ultraluminous X-ray sources (ULXs) with LX ≥ 1040 ergs s-1 in nearby galaxies.
J. Miller +4 more
semanticscholar +1 more source
Observational evidence for stellar-mass black holes [PDF]
Proceedings of the International Astronomical Union, 2006 AbstractRadial velocity studies of X-ray binaries provide the most solid evidence for the existence of stellar-mass black holes. We currently have 20 confirmed cases, with dynamical masses in excess of 3 M⊙. Accurate masses have been obtained for a subset of systems which gives us a hint at the mass spectrum of the black hole population.
openaire +2 more sources
Advanced Functional Materials, EarlyView.Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He +5 more
wiley +1 more source
GW231123: Likely a Product of Successive Mergers from ∼10 Stellar-mass Black Holes
The Astrophysical JournalGW231123 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 +3 more
doaj +1 more source
Neutrino pair annihilation near accreting, stellar-mass black holes [PDF]
, 2006 Context. We investigate the deposition of energy and momentum due to the annihilation of neutrinos ( ) and antineutrinos (¯ ) in the vicinity of steady, axisymmetric accretion tori around stellar-mass black holes (BHs).
R. Birkl +7 more
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.Degradable Polyphosphoester (PPE) gradient copolymers (GCPs) are synthesized via one‐pot copolymerization. We show that GCPs self‐assemble into nanostructures like polymersomes, effectively mimicking the behavior of traditional BCPs. The gradient strength is key, with softer gradients favoring micelles.
Suna Azhdari +7 more
wiley +1 more source
Advanced Functional Materials, EarlyView.This study introduces a novel chloro boron subphthalocyanine/polymer blend OFET sensor achieving 0.005 ppb limit of detection for ammonia at room temperature and high selectivity against similar amines. An original theoretical framework is proposed to describe the sensing mechanism, relating analyte molecular volume and Lewis basicity to sensor ...
Kavinraaj Ella Elangovan +6 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Applying a high electric field to a doped organic semiconductor heats up the charge carrier distribution beyond the lattice temperature, enhancing conductivity. It is shown that the associated effective temperature can be used to extract the effective localization length, which is a characteristic length scale of charge transport and provides ...
Morteza Shokrani +4 more
wiley +1 more source
The Astrophysical Journal LettersThe centers of massive elliptical galaxies exhibit a wide range in density profiles, from central cusps to resolved cores with order kiloparsec sizes.
Kyle Kremer +4 more
doaj +1 more source
Estimating the Spin of Stellar-Mass Black Holes by Spectral Fitting of the X-Ray Continuum [PDF]
, 2005 We fit X-ray spectral data in the thermal-dominant, or high-soft, state of two dynamically confirmed black holes, GRO J1655-40 and 4U 1543-47, and estimate the dimensionless spin parameters a* ≡ a/M of the two holes.
Rebecca Shafee +5 more
semanticscholar +1 more source