Results 61 to 70 of about 2,875,148 (209)
Cryptobaryonic Dark Matter [PDF]
Physical Review Letters, 2005 It is proposed that dark matter could consist of compressed collections of atoms (or metallic matter) encapsulated into, for example, 20 cm big pieces of a different phase. The idea is based on the assumption that there exists at least one other phase of the vacuum degenerate with the usual one.
Froggatt, C. D., Nielsen, H. B.
openaire +3 more sources
DARKSUSY – A NUMERICAL PACKAGE FOR DARK MATTER CALCULATIONS IN THE MSSM
, 2001 The question of the nature of the dark matter in the Universe remains one of the most outstanding unsolved problems in basic science. One of the best motivated particle physics candidates is the lightest supersymmetric particle, assumed to be the ...
EDWARD A. BALTZ +9 more
core +1 more source
Unexpected major geomagnetic storm caused by faint eruption of a solar trans-equatorial flux rope
Nature CommunicationsSome geomagnetic storms’ solar origins are ambiguous, making them hard to predict. On March 23, 2023, a severe geomagnetic storm occurred, however, forecasts based on remote-sensing observations failed to predict it.
Weilin Teng +3 more
doaj +1 more source
Dark Matter Bounds From 21-cm Cosmology
, 2022 reservedObserving the redshifted 21-cm line of atomic hydrogen allows us to test the early universe during the first phases of cosmic structure formation.
CIMA, FEDERICO
core
What X-rays tell us about dark matter halos
, 2004 We present a detailed non-spherical modeling of dark matter halos on the basis of a careful analysis of state-of-the art N-body simulations. The fitting formulae presented here form a complete and accurate description of the triaxial density profiles of ...
Ryder, SD +4 more
core +1 more source
A delayed 400 GeV photon from GRB 221009A and implication on the intergalactic magnetic field
Nature CommunicationsLarge High Altitude Air Shower Observatory has detected 0.2 − 13 TeV emission of GRB 221009A within 2000 s since the trigger. Here we report the detection of a 400 GeV photon, without accompanying prominent low-energy emission, by Fermi Large Area ...
Zi-Qing Xia +3 more
doaj +1 more source
The clustering of dark matter, haloes & galaxies [PDF]
, 2008 In this thesis I study the spatial distribution of galaxies, haloes and dark matter particles using a suite of state-of-art cosmological N-body simulations of the growth structure in the Universe.
Angulo de la Fuente, Raúl Esteban
core
Classification of three-family flavoured DFSZ axion models that have no domain wall problem
Journal of High Energy PhysicsWe provide an exhaustive classification of three-family DFSZ axion models that have no cosmological domain wall problem. This result is obtained by making the Peccei-Quinn symmetry flavour dependent in certain specific ways, thus reinforcing a possible ...
Peter Cox +4 more
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Evidence for dynamical dark energy with an evolving Hubble constant
Astronomy & AstrophysicsContext. Hubble constant tension, together with the recent indications of dynamical dark energy proposed from the Dark Energy Spectroscopic Instrument (DESI) baryon acoustic oscillation (BAO) measurements, poses significant challenges for the standard ...
Wang Yi-Ying, Li Yin-Jie, Fan Yi-Zhong
doaj +1 more source
DARK ENERGY, DARK MATTER AND GRAVITY [PDF]
International Journal of Modern Physics D, 2007 We discuss the motivation for high accuracy relativistic gravitational experiments in the solar system and complementary cosmological tests. We focus our attention on the issue of distinguishing a generic scalar theory of gravity as the underlying physical theory from the usual general-relativistic picture, where one expects the presence of ...
openaire +2 more sources