Results 251 to 260 of about 4,188,611 (364)

The CfA Redshift Survey: Data for the NGP +36 Zone

open access: bronze, 1995
J. P. Huchra   +2 more
openalex   +1 more source

Optical Chaos Generation and Applications

open access: yesAdvanced Photonics Research, EarlyView.
This review comprehensively examines optical chaos generation via feedback, injection, and optoelectronic methods, emphasizing bandwidth enhancement and time‐delay suppression. Applications include chaos‐synchronized secure communication, physical random number generation, chaotic lidar for cm‐level detection, distributed fiber sensing, and terahertz ...
Wenhui Chen   +8 more
wiley   +1 more source

Testing the consistency of early and late cosmological parameters with BAO and CMB data

open access: yesPhysics Letters B
The recent local measurements of the Hubble constant H0, indicate a significant discrepancy of over 5σ compared to the value inferred from Planck observations of the cosmic microwave background (CMB).
Guanlin Liu, Yu Wang, Wen Zhao
doaj  

Late-time growth weakly affects the significance of high-redshift massive galaxies

open access: yesThe Open Journal of Astrophysics
Recent observations by the James Webb Space Telescope have revealed massive galaxies at very high redshift ($z\simeq 7-15$). The question of whether the existence of such galaxies is expected in the corresponding JWST surveys has received a lot of ...
Qianran Xia   +2 more
doaj   +1 more source

Multi-messenger gravitational lensing. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci
Smith GP   +40 more
europepmc   +1 more source

sconce: a cosmic web finder for spherical and conic geometries. [PDF]

open access: yesMon Not R Astron Soc, 2022
Zhang Y, de Souza RS, Chen YC.
europepmc   +1 more source

Beam Combining of a Tunable Tilted Quantum Cascade Laser Array

open access: yesAdvanced Photonics Research, EarlyView.
The four‐channel tilted waveguide with varying angles in the quantum cascade laser array, achieving a free tuning range of 100 nm and common‐aperture output simultaneously, is reported. The fabrication eliminates the necessity of electron‐beam lithography and is very promising for mass production in gas sensing industry.
Fan Ye   +7 more
wiley   +1 more source

Challenges to the [Formula: see text]CDM cosmology. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci
Efstathiou G.
europepmc   +1 more source

Supermassive Dark Star candidates seen by JWST. [PDF]

open access: yesProc Natl Acad Sci U S A, 2023
Ilie C, Paulin J, Freese K.
europepmc   +1 more source

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