Results 1 to 10 of about 3,626 (70)

Luminescence quenching studies of [Ru(dMeObpy)3]2+ complex using the quinone derivative-effect of micelles [PDF]

Journal of Particle Science and Technology, 2023
Quinones are considered a class of organic compounds having a quinonoid group and are the ultimate electron acceptors. Due to this property, they have favourable redox potential and the ability to form stable hydrogen bonds. Luminescence quenching is one
Thangadurai Sumitha Celin, George Allen Gnana Raj   +1 more
doaj   +1 more source

Screening Mechanisms on White Dwarfs: Symmetron and Dilaton

Universe
This work provides the first comparison of the symmetron and dilaton fields in white dwarfs. We show how these screening mechanisms behave inside such stars and their impact on stellar properties.
Joan Bachs-Esteban, Ilídio Lopes, Javier Rubio   +2 more
doaj   +1 more source

Neutron Decay Anomaly and Its Effects on Neutron Star Properties

Universe
We investigate the effects of dark matter (DM) on neutron star (NS) properties using the neutron decay anomaly model within the relativistic mean-field (RMF) framework.
H. C. Das, G. F. Burgio
doaj   +1 more source

Kerr Black Hole as a Pevatron at the Galaxy Center

Universe
Conventional general relativity supplies the notion of a vacuum tension and thus a maximum force Fmax=c4/4G≃3·1043 N that is realized for a black hole. In conjunction with the Wilson area rule, we are thus led to the surface confinement of the mass of a ...
Orlando Panella, Simone Pacetti, Giorgio Immirzi, Yogendra Srivastava   +3 more
doaj   +1 more source

On the X-Ray Emission from Supernovae, and Implications for the Mass-Loss Rates of Their Progenitor Stars

Universe
We summarize the X-ray emission from young SNe. Having accumulated data on most observed X-ray SNe, we display the X-ray lightcurves of young SNe. We also explore the X-ray spectra of various SN types. The X-ray emission from Type Ib/c SNe is non-thermal.
Vikram V. Dwarkadas
doaj   +1 more source

Group-Theoretical Classification of Orientable Objects and Particle Phenomenology

Universe
The quantum description of relativistic orientable objects by a scalar field on the Poincaré group is considered. The position of the relativistic orientable object in Minkowski space is completely determined by the position of a body-fixed reference ...
Dmitry M. Gitman, Aleksey L. Shelepin
doaj   +1 more source

Is Planckian Discreteness Observable in Cosmology?

Universe
A Planck scale inflationary era—in a quantum gravity theory predicting discreteness of quantum geometry at the fundamental scale—produces the scale-invariant spectrum of inhomogeneities with a very small tensor-to-scalar ratio of perturbations and a hot ...
Gabriel R. Bengochea, Gabriel León, Alejandro Perez   +2 more
doaj   +1 more source

Ultraviolet Background Radiation from Not-So-Dark Matter in the Galactic Halo

Universe
Murthy et al. (2025) (hereafter Paper I) have recently reported the discovery of unexpectedly bright diffuse extreme-ultraviolet radiation at high latitudes in both the Northern and Southern Galactic Hemispheres.
Richard Conn Henry, Jayant Murthy, James Overduin   +2 more
doaj   +1 more source

Nonrelativistic Superfluids in Cosmology from a Relativistic Approach: Revisiting Two Formulations of Superfluidity

Universe
Two formulations of superfluidity are reviewed: Landau’s phenomenological two-fluid model and a relativistic effective field theory description.
Aline Favero, Heliudson Bernardo
doaj   +1 more source

Possible Multi-Band Afterglows of FRB 20171020A and Their Implications

Universe
Fast Radio Bursts (FRBs) are millisecond-duration radio transients of mysterious origin, with growing evidence linking at least some of them to magnetars.
Ke Bian, Can-Min Deng
doaj   +1 more source