Results 51 to 60 of about 22,727 (221)

SLAC T-510: Radio emission from particle cascades in the presence of a magnetic field

open access: yesEPJ Web of Conferences, 2017
Cosmic ray induced particle cascades radiate in radio frequencies in the Earth’s atmosphere. Geomagnetic and Askaryan emission provide an effective way to detect ultra-high energy cosmic rays.
Mulrey Katharine
doaj   +1 more source

Unraveling the active site cover of coproheme decarboxylase from Listeria monocytogenes

open access: yesThe FEBS Journal, EarlyView.
During heme biosynthesis in Gram‐positive bacteria, coproheme decarboxylase (ChdC) catalyzes the conversion of four‐propionate substrate coproheme to the two propionate product heme b. Its active site is universally covered by a flexible linking loop. This study identifies an important histidine residue, which stabilizes the loop in a ChdC homolog.
Nikolaus Falb   +4 more
wiley   +1 more source

Palamism Does Not Disfigure the Gospel: A Reply to Thomas Weinandy

open access: yesInternational Journal of Systematic Theology, EarlyView.
Abstract In a 2024 article in the IJST, Fr. Thomas Weinandy argues that the theological system of Gregory Palamas is in grave error, especially with respect to its commitment to an objective ontological distinction between God's essence and His energies. In his concluding paragraph Fr.
Travis Dumsday
wiley   +1 more source

Gamma ray Cerenkov telescope image analysis [PDF]

open access: yes, 1997
The subject of this thesis is ground based gamma ray astronomy using the imaging atmospheric Cerenkov technique. The first two chapters are introductory, and describe the field of gamma ray astronomy, the generation of extensive air showers in the ...
Holder, J., Holder, Jamie
core  

Stand-alone cosmic muon reconstruction before installation of the CMS silicon strip tracker [PDF]

open access: yes, 2009
This is the Pre-print version of the Article. The official published version can be accessed from the link below - Copyright @ 2009 IOPThe subsystems of the CMS silicon strip tracker were integrated and commissioned at the Tracker Integration Facility ...
Brom J-   +999 more
core   +1 more source

Raman analysis of organic refractory materials after energetic processing: Evidence for amorphous carbon on TNOs and comets

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Amorphous carbon (αC) is found in various extraterrestrial particles, including those thought to originate from the outer Solar System. αC can form through two main processes involving C‐rich materials: exposure to energetic charged particles and thermal processing.
M. Germanà   +10 more
wiley   +1 more source

TeV gamma-ray emission from accreting binary pulsars [PDF]

open access: yes, 1990
The high-mass X-ray binary SMC X-1 has been observed during the interval 1986-1989 at a threshold γ-ray energy of 0.4 TeV using the University of Durham Mark III air Cerenkov telescope at Narrabri.
Mannings, Vincent, Mannings, V
core  

Ultra High Energy Cosmic Rays [PDF]

open access: yesAIP Conference Proceedings, 2003
The physics of cosmic rays was intensively developed during the last century. The subject of ultra high energy cosmic rays has received special attention during the last partly due to the controversy between the results of the HiRes and AGASA Observatories and the puzzle caused by super‐GZK observed events.
openaire   +3 more sources

The Pierre Auger Observatory: latest results and future perspectives

open access: yesEPJ Web of Conferences, 2018
The Pierre Auger Observatory is the largest ultrahigh-energy cosmic ray observatory in the world. The huge amount of high quality data collected since 2004 up to now led to great improvements in our knowledge of the ultra-energetic cosmic rays.
Buscemi Mario
doaj   +1 more source

ON ULTRA-HIGH-ENERGY COSMIC RAYS AND THEIR RESULTANT GAMMA-RAYS [PDF]

open access: yesThe Astrophysical Journal, 2016
ABSTRACT The Fermi Large Area Telescope collaboration has recently reported on 50 months of measurements of the isotropic extragalactic gamma-ray background (EGRB) spectrum between 100 MeV and 820 GeV. Ultra-high-energy cosmic ray (UHECR) protons interact with the cosmic microwave background photons and produce cascade photons of ...
Eyal Gavish, David Eichler
openaire   +2 more sources

Home - About - Disclaimer - Privacy