Results 1 to 10 of about 911 (41)
Particle Candidates of Ultrahigh Energy Cosmic Rays [PDF]
, 2001 We discuss candidates for trans-GZK cosmic rays observed in a variety of detectors. Three types of primaries are represented among the abstracts submitted to this meeting: neutrin os causing a Z-burst, protons arising from the decay of ultra-heavy ...
Domokos, G., Kovesi-Domokos, S.
core +4 more sources
Determining the Cosmic Equation of State Using Future Gravitational Wave Detectors [PDF]
, 2001 The expected chirp mass distribution of observed events for future gravitational wave detectors is extensively investigated in the presence of an exotic fluid component with an arbitrary equation of state, $-1 \leq \omega_x \equiv p_x/\rho_x < 0$, i.e ...
Abramovici +41 more
core +3 more sources
Cosmic microwave background polarization, Faraday rotation and stochastic gravity-waves backgrounds [PDF]
, 1997 A magnetic field, coherent over the horizon size at the decoupling and strong enough to rotate the polarization plane of the CMBR, can be generated from the electromagnetic vacuum fluctuations amplified by the space-time evolution of the dilaton coupling.
A. Abramovici +62 more
core +2 more sources
50 TeV HEGRA Sources and Infrared Radiation [PDF]
, 1997 The recent observations of 50 TeV gamma radiation by HEGRA have the potential of determining the extragalactic flux of infrared radiation. The fact that radiation is observed in the range between 30 and 100 TeV sets an upper limit on the infrared flux ...
Berezinsky, V. +2 more
core +2 more sources
Is the squeezing of relic gravitational waves produced by inflation detectable? [PDF]
, 1999 Grishchuk has shown that the stochastic background of gravitational waves produced by an inflationary phase in the early Universe has an unusual property: it is not a stationary Gaussian random process. Due to squeezing, the phases of the different waves
A. Abramovici +23 more
core +2 more sources
New Constraints on a Light Spinless Particle Coupled to Photons [PDF]
, 1997 We obtain new stringent constraints on a light spinless particle phi coupled only to photons at low energies, considering its effects on the extragalactic photon background, the blackbody spectrum of the CMBR and the cosmological abundance of deuterium ...
Masso, Eduard, Toldra, Ramon
core +4 more sources
What we can learn on inflation from recent CMBR data [PDF]
, 2001 We review the prediction of inflation and the constraints on inflationary models coming from recent observations.Comment: 10 pages, 2 figures; to be published in JHEP - Proceedings of the International Europhysics Conference on High Energy Physics ...
Covi, Laura
core +2 more sources
The Use of Cryogenic HEMT Amplifiers in Wide Band Radiometers [PDF]
, 2000 Advances in device fabrication, modelling and design techniques have made wide band, low noise cryogenic amplifiers available at frequencies up to 106 GHz. Microwave radiometry applications as used in radio astronomy capitalize on the low noise and large
Jarosik, Norman
core +1 more source
Design Considerations for Large Detector Arrays on Submillimeter-wave Telescopes [PDF]
, 2000 The emerging technology of large (~ 10,000 pixel) submillimeter-wave bolometer arrays presents a novel optical design problem---how can such arrays be fed by diffraction-limited telescope optics where the primary mirror is less than 100,000 wavelengths ...
Stark, Antony A.
core +4 more sources
Plans for a 10-m Submillimeter-wave Telescope at the South Pole [PDF]
, 1998 A 10 meter diameter submillimeter-wave telescope has been proposed for the NSF Amundsen-Scott South Pole Station. Current evidence indicates that the South Pole is the best submillimeter-wave telescope site among all existing or proposed ground-based ...
Carlstrom, John E. +7 more
core +3 more sources