Results 61 to 70 of about 78,343 (241)

A common origin of all the species of high-energy cosmic rays? [PDF]

, 1999
Cosmic ray nuclei, cosmic ray electrons with energy above a few GeV, and the diffuse gamma-ray background radiation (GBR) above a few MeV, presumed to be extragalactic, could all have their origin or residence in our galaxy and its halo.
Antoniou, Nikos, Dar, Arnon, De Rújula, A.   +2 more
core   +1 more source

Cosmological Dynamics of Interacting Dark Energy and Dark Matter in f(Q)$f(Q)$ Gravity

Fortschritte der Physik, Volume 73, Issue 5, May 2025.
Abstract In this work, the behavior of interacting dark energy (DE) and dark matter (DM) within a model of f(Q)$f(Q)$ gravity is explored, employing the standard framework of dynamical system analysis. The power‐law f(Q)$f(Q)$ model is considered, incorporating two different forms of interacting DE and DM: 3αHρm$3\alpha H\rho _m$ and α3HρmρDE$\frac ...
Gaurav N. Gadbail, Simran Arora, Phongpichit Channuie, P. K. Sahoo   +3 more
wiley   +1 more source

Using cosmic microwave background radiation analysis tools for flow anisotropies in relativistic heavy-ion collisions [PDF]

, 2008
Recently we have shown that there are crucial similarities in the physics of cosmic microwave background radiation (CMBR) anisotropies and the flow anisotropies in relativistic heavy-ion collision experiments (RHICE).
A. P. Mishra, R. K. Mohapatra, P. Saumia, A. Srivastava   +3 more
semanticscholar   +1 more source

Remotely Sensed High‐Resolution Soil Moisture and Evapotranspiration: Bridging the Gap Between Science and Society

Water Resources Research, Volume 61, Issue 5, May 2025.
Abstract This paper reviews the current state of high‐resolution remotely sensed soil moisture (SM) and evapotranspiration (ET) products and modeling, and the coupling relationship between SM and ET. SM downscaling approaches for satellite passive microwave products leverage advances in artificial intelligence and high‐resolution remote sensing using ...
Jingyi Huang, Vinit Sehgal, Laura V. Alvarez, Luca Brocca, Shuohao Cai, Rui Cheng, Xinghua Cheng, Jinyang Du, Bassil El Masri, K. Arthur Endsley, Yilin Fang, Jie Hu, Mahesh Jampani, Md Golam Kibria, Gerbrand Koren, Lingcheng Li, Laibao Liu, Jiafu Mao, Hernan A. Moreno, Angela Rigden, Mingjie Shi, Xiaoying Shi, Yaoping Wang, Xi Zhang, Joshua B. Fisher   +24 more
wiley   +1 more source

Cosmic 21-cm Fluctuations as a Probe of Fundamental Physics

, 2007
Fluctuations in high-redshift cosmic 21-cm radiation provide a new window for observing unconventional effects of high-energy physics in the primordial spectrum of density perturbations.
Batra P Kleban M, Biswas T, Bousso R, Cooray A, Freivogel B, Hogan C J, Ian Swanson, Kaloper N, Khatri R Wandelt B D, Khoury J, Kolb E W Chung D J H Riotto A, Kris Sigurdson, Lewis A Challinor A, Matthew Kleban, Metcalf R B White S D M, Pillepich A Porciani C Matarrese S, Pritchard J R Furlanetto S R, Scott D, Shchekinov Y A Vasiliev E O, Starobinsky A A, Sunyaev R A, Susskind L, Tanaka T, Wang X M Tegmark M Santos M Knox L   +23 more
core   +1 more source

Dark Energy From the Gravitational Wave Background With Scalar Field Dark Matter

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT Recent observational results, such as those from pulsar timing arrays (PTA), suggest a low‐frequency Gravitational Wave Background (GWB) permeates our universe. This opens the possibility that gravitational waves could span a broader spectrum, potentially impacting cosmological scales.
Edwin L. Pérez‐Ochoa, Tonatiuh Matos
wiley   +1 more source

Can X-Ray Jets Be Cosmic Beacons?

, 2001
If X-rays observed from any extragalactic radio jets are due to inverse Compton scattering on the cosmic microwave background (CMB) radiation, then such a source will be detectable with the same surface brightness anywhere in the more distant universe ...
Schwartz, Dan
core   +1 more source

Spherical Orbifolds for Cosmic Topology [PDF]

, 2012
Harmonic analysis is a tool to infer cosmic topology from the measured astrophysical cosmic microwave background CMB radiation. For overall positive curvature, Platonic spherical manifolds are candidates for this analysis.
Aurich R, Coxeter H S M, Edmonds A R, Einstein A, Kramer P, Kramer P, Kramer P, Kramer P, Kramer P, Kramer P, Kramer P, Kramer P, Larson D, Laue M v, Lax M, Misner Ch W, Peter Kramer, Ratcliffe J G, Seifert H, Sommerville D M Y, Weeks J, Wolf J A   +21 more
core   +1 more source

Euler–Heisenberg Black Hole Surrounded by Quintessence in the Background of Perfect Fluid Dark Matter: Thermodynamics, Shadows, and Quasinormal Modes

Fortschritte der Physik, Volume 73, Issue 3, March 2025.
Abstract Current observations show that a significant fraction of the Universe is composed of dark energy and dark matter. In this paper, the simultaneous effects of these dark sectors on the Euler–Heisenberg black hole are investigated, using the quintessence matter field and perfect fluid to model them. In particular, the black hole's thermodynamics,
Bilel Hamil, Bekir Can Lütfüoğlu
wiley   +1 more source

Level Crossing Analysis of Cosmic Microwave Background Radiation: A method for detecting cosmic strings [PDF]

, 2010
In this paper we study the footprint of cosmic string as the topological defects in the very early universe on the cosmic microwave background radiation.
M. Movahed, S. Khosravi
semanticscholar   +1 more source