Results 41 to 50 of about 36,124 (299)
Chasing the Tail of Cosmic Reionization with Dark Gap Statistics in the Lyα Forest over 5 < z < 6 [PDF]
Astrophysical Journal, 2021 We present a new investigation of the intergalactic medium (IGM) near the end of reionization using “dark gaps” in the Lyα forest. Using spectra of 55 QSOs at z em > 5.5, including new data from the XQR-30 VLT Large Programme, we identify gaps in the Lyα
Yongda Zhu +16 more
semanticscholar +1 more source
PAWS and POCO: NIR Astrophotonic Instruments for Astronomy
Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023 Abstract For near‐infrared ground and space‐based astronomy, compact photonic devices can replace the large bulk optical components in spectrographs, frequency combs, beam combiners, and sky subtraction filters, thus saving cost, reducing volume, weight, and power requirements.
Kalaga Madhav +8 more
wiley +1 more source
Bridging the Gap between Cosmic Dawn and Reionization Favors Models Dominated by Faint Galaxies
The Astrophysical Journal, 2023 It has been claimed that traditional models struggle to explain the tentative detection of the 21 cm absorption trough centered at z ∼ 17 measured by the EDGES collaboration. On the other hand, it has been shown that the EDGES results are consistent with
Ankita Bera +6 more
doaj +1 more source
Detector system challenges of the wide‐field spectroscopic survey telescope (WST)
Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023 Abstract The wide‐field spectroscopic survey telescope (WST) is proposed to become the next large optical/near infrared facility for the European southern observatory (ESO) once the extremely large telescope (ELT) has become operational. While the latter is optimized for unprecedented sensitivity and adaptive‐optics assisted image quality over a small ...
Roland Bacon +4 more
wiley +1 more source
The galaxies that reionized the Universe [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 14 pages, 13 figures, paper accepted for publication in ...
Milan Raičević +4 more
openaire +6 more sources
Journal of Geophysical Research: Space Physics, Volume 128, Issue 10, October 2023., 2023 Abstract We analyze the emission of energetic neutral atom (ENA) flux from charge exchange between Jovian magnetospheric ions and the atmospheres of Callisto and Europa. For this purpose, we combine the draped electromagnetic fields from a hybrid plasma model with a particle tracing tool for the energetic ions.
C. Michael Haynes +5 more
wiley +1 more source
Simulation-based Inference of Reionization Parameters from 3D Tomographic 21 cm Light-cone Images [PDF]
Astrophysical Journal, 2021 Tomographic three-dimensional 21 cm images from the epoch of reionization contain a wealth of information about the reionization of the intergalactic medium by astrophysical sources.
Xiaosheng Zhao +3 more
semanticscholar +1 more source
Polarity Asymmetries in Rocket‐Triggered Lightning
Geophysical Research Letters, Volume 50, Issue 17, 16 September 2023., 2023 Abstract The dissonant development of positive and negative lightning leaders is a central question in atmospheric electricity. It is also the likely root cause of other reported asymmetries between positive and negative lightning flashes, including the ones regarding: stroke multiplicity, recoil activity, leader velocities, and emission of energetic ...
C. L. da Silva +10 more
wiley +1 more source
Cosmic birefringence tomography and calibration-independence with reionization signals in the CMB [PDF]
Monthly notices of the Royal Astronomical Society, 2021 The search for cosmic polarization rotation or birefringence in the CMB is well-motivated because it can provide powerful constraints on parity-violating new physics, such as axion-like particles.
B. Sherwin, T. Namikawa
semanticscholar +1 more source
Annalen der Physik, Volume 535, Issue 7, July 2023., 2023 Implications for the cosmological model are explored of the assumption that the cosmic microwave background is subject to an SU(2) Yang– Mills theory of scale 10−4 eV rather than U(1) quantum thermodynamics. This concerns zeroth‐order (changes at high redshifts) and first‐order cosmological perturbations (changes at high and low redshifts).
Ralf Hofmann +2 more
wiley +1 more source