Scalar induced gravitational waves in light of Pulsar Timing Array data [PDF]
Science China Physics Mechanics and Astronomy, 2023 The power-law parametrization for the energy density spectrum of gravitational wave (GW) background is a useful tool to study its physics and origin. While scalar induced secondary gravitational waves (SIGWs) from some particular models fit the signal ...
Zhu Yi +4 more
semanticscholar +1 more source
Optimization of passivation in AlGaN/GaN heterostructure microwave transistor fabrication by ICP CVD [PDF]
Modern Electronic Materials, 2020 We have studied the effect of silicon nitride (SiN) dielectric passivating film deposition by inductively coupled plasma chemical vapor deposition (ICP CVD) on the parameters of AlGaN/GaN heterostructure high electron mobility transistors (HEMT).
Anastasia A. Sleptsova +3 more
doaj +3 more sources
On the Evidence for a Common-spectrum Process in the Search for the Nanohertz Gravitational-wave Background with the Parkes Pulsar Timing Array [PDF]
, 2021 A nanohertz-frequency stochastic gravitational-wave background can potentially be detected through the precise timing of an array of millisecond pulsars.
B. Goncharov +28 more
semanticscholar +1 more source
Common-red-signal analysis with 24-yr high-precision timing of the European Pulsar Timing Array: Inferences in the stochastic gravitational-wave background search [PDF]
, 2021 We present results from the search for a stochastic gravitational-wave background (GWB) as predicted by the theory of General Relativity using six radio millisecond pulsars from the Data Release 2 (DR2) of the European Pulsar Timing Array (EPTA) covering
S. Chen +51 more
semanticscholar +1 more source
The FAST Galactic Plane Pulsar Snapshot survey: I. Project design and pulsar discoveries [PDF]
Research in Astronomy and Astrophysics, 2021 Discovery of pulsars is one of the main goals for large radio telescopes. The Five-hundred-meter Aperture Spherical radio Telescope (FAST), that incorporates an L-band 19-beam receiver with a system temperature of about 20 K, is the most sensitive radio ...
J. Han +36 more
semanticscholar +1 more source
Control of yellow photoluminescence in AlGaN/GaN heterostructures [PDF]
Modern Electronic Materials, 2019 Photoluminescence with the peak corresponding to yellow color of the visible spectrum (so-called yellow luminescence) originates from deep levels in the GaN buffer layers of heterostructures and depends on heterostructure growth conditions.
Nadezhda B. Gladysheva +4 more
doaj +3 more sources
FAST Globular Cluster Pulsar Survey: Twenty-four Pulsars Discovered in 15 Globular Clusters [PDF]
Astrophysical Journal Letters, 2021 We present the discovery of 24 pulsars in 15 globular clusters (GCs) using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). These include the first pulsar discoveries in M2, M10, and M14.
Z. Pan +10 more
semanticscholar +1 more source
Theoretical Study of Gamma-ray Pulsars [PDF]
Journal of Astronomy and Space Sciences, 2016 We use the non-stationary three dimensional two-layer outer gap model to explain gamma-ray emissions from a pulsar magnetosphere. We found out that for some pulsars like the Geminga pulsar, it was hard to explain emissions above a level of around 1 GeV.
Kwong Sang Cheng, Jumpei Takata
doaj +1 more source
Galaxies, 2023 In this paper, the possibility of periodic pulsar-like gamma-ray emission from the white dwarfs in AE Aquarii and AR Scorpii is investigated. We show that the white dwarf magnetospheres in AE Aquarii and AR Scorpii can possibly induce potentials to ...
Pieter J. Meintjes +3 more
doaj +1 more source
Vacuum ultraviolet coherent undulator radiation from attosecond electron bunches
Scientific Reports, 2021 Attosecond duration relativistic electron bunches travelling through an undulator can generate brilliant coherent radiation in the visible to vacuum ultraviolet spectral range.
Enrico Brunetti +9 more
doaj +1 more source