Results 61 to 70 of about 32,240 (255)
Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade
Radio Science, Volume 60, Issue 7, July 2025.Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park +13 more
wiley +1 more source
Gamma‐Ray Bursts: A Radio Perspective
Advances in Astronomy, Volume 2016, Issue 1, 2016., 2016 Gamma‐ray bursts (GRBs) are extremely energetic events at cosmological distances. They provide unique laboratory to investigate fundamental physical processes under extreme conditions. Due to extreme luminosities, GRBs are detectable at very high redshifts and potential tracers of cosmic star formation rate at early epoch. While the launch of Swift and
Poonam Chandra, WeiKang Zheng
wiley +1 more source
The Astrophysical JournalThe variations in Ly α forest opacity observed at z > 5.3 between lines of sight to different background quasars are too strong to be caused by fluctuations in the density field alone.
Frederick B. Davies +18 more
doaj +1 more source
Highly-Ionized Oxygen Absorbers in the Intergalactic Medium
, 2004 Recent ultraviolet and X-ray observations of intergalactic OVI and OVII absorption systems along lines of sight to bright quasars have opened a new window onto the ``warm-hot intergalactic medium'' (WHIM).
Furlanetto, Steven +2 more
core +3 more sources
Interacting Dark Matter and q‐Deformed Dark Energy Nonminimally Coupled to Gravity
Advances in High Energy Physics, Volume 2016, Issue 1, 2016., 2016 In this paper, we propose a new approach to study the dark sector of the universe by considering the dark energy as an emerging q‐deformed bosonic scalar field which is not only interacting with the dark matter, but also nonminimally coupled to gravity, in the framework of standard Einsteinian gravity.
Emre Dil, Sergei D. Odintsov
wiley +1 more source
Cosmic Reionization on Computers: The Evolution of the Ionizing Background and Mean Free Path
The Astrophysical JournalObservations of the end stages of reionization indicate that at z ≈ 5–6, the ionizing background is not uniform and the mean free path (MFP) changes drastically.
Jiawen Fan +3 more
doaj +1 more source
Carbon Energy, Volume 7, Issue 2, February 2025.In this review, we aim to provide a comprehensive understanding of plasma and its application in energy storage and conversion. The classification of plasma technologies and principles are summarized. Recent developments in the synthesis or modification of multiscale materials based on plasma techniques including conversion, doping, deposition, and ...
Chen Li +10 more
wiley +1 more source
Investigating Ionization in the Intergalactic Medium
The Astrophysical JournalThe intergalactic medium (IGM) contains >50% of the baryonic mass of the Universe, yet the mechanisms responsible for keeping the IGM ionized have not been fully explained.
Brad Koplitz +2 more
doaj +1 more source
A New Limit on Intergalactic Magnetic Fields on Subkiloparsec Scales from Fast Radio Bursts
The Astrophysical Journal Letters, 2023 We use the measured scattering timescales of fast radio bursts (FRBs) from the CHIME catalog to derive an upper limit on the magnetic field on subkiloparsec scales in the intergalactic medium (IGM).
Hamsa Padmanabhan, Abraham Loeb
doaj +1 more source
On the origin of highest energy gamma-rays from Mkn 501 [PDF]
, 2001 The spectra of very high energy gamma-radiation from distant extragalactic objects suffer significant deformations during the passage of primary gamma-rays through the intergalactic medium.
A. N. Timokhin +72 more
core +2 more sources