(High energy physics and cosmology)
This research will focus on the implications of recent theories and experiments in high energy physics for the evolution of the early Universe, and on the constraints that cosmological considerations can place on such theories. Several problems are under investigation, including the development of constraints on the inflationary predictions of scale-free primordial fluctuations in a universe at critical closure density by studying their linear and non-linear evolution after they re-enter the particle horizon. We will examine the observable imprint of primordial density fluctuations on the cosmic microwave background radiation in curved cosmological models. Most astronomical evidence points to an open universe: one of our goals is to reconcile this conclusion with the particle physics input. We will investigate the response of the matter distribution to a network of cosmic strings produced during an early symmetry--breaking transition, and compute the resulting cosmic microwave background anisotropies. We will simulate the formation of large--scale structures whose dynamics are dominated by weakly interacting particles such as axions massive neutrinos or photinos in order to model the formation of galaxies, galaxy clusters and superclusters. We will study the distortions in the microwave background radiation, both spectral and angular, that are produced by ionized gas associated with forming clusters and groups of galaxies. We will also study constraints on exotic cooling mechanisms involving axions and majorons set by stellar evolution and the energy input into low mass stars by cold dark matter annihilation in galactic nuclei. We will compute the detailed gamma ray spectrum predicted by various cold dark matter candidates undergoing annihilation in the galactic halo and bulge.
- Research Organization:
- California Univ., Berkeley, CA (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- FG03-84ER40161
- OSTI ID:
- 6315408
- Report Number(s):
- DOE/ER/40161-T2; ON: DE91006854; TRN: 91-003419
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASTROPHYSICS
RESEARCH PROGRAMS
COSMOLOGICAL MODELS
AXIONS
GALACTIC EVOLUTION
INFLATIONARY UNIVERSE
MICROWAVE RADIATION
NEUTRAL CURRENTS
NONLUMINOUS MATTER
PROGRESS REPORT
RELICT RADIATION
SOLAR NEUTRINOS
STRING MODELS
ALGEBRAIC CURRENTS
BOSONS
COMPOSITE MODELS
CURRENTS
DOCUMENT TYPES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EXTENDED PARTICLE MODEL
FERMIONS
GOLDSTONE BOSONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
NEUTRINOS
PARTICLE MODELS
POSTULATED PARTICLES
QUARK MODEL
RADIATIONS
SOLAR PARTICLES
SOLAR RADIATION
STELLAR RADIATION
640106* - Astrophysics & Cosmology- Cosmology
645200 - High Energy Physics- Particle Interactions & Properties-Theoretical
645400 - High Energy Physics- Field Theory