Results 91 to 100 of about 26,451 (248)
Generative models of 21 cm Epoch of Reionisation lightcones with 3D scattering transforms
Astronomy & AstrophysicsThe 21 cm signal from the Epoch of Reionisation (EoR) is observed as a 3D dataset known as a lightcone, consisting of two spatial sky plane axes and a redshift (frequency) axis.
Hothi Ian +3 more
doaj +1 more source
The Astrophysical Journal, 2023 We present the lifetime star formation histories (SFHs) for six ultrafaint dwarf (UFD; M _V > − 7.0, $4.9\lt {\mathrm{log}}_{10}({M}_{* }(z=0)/{M}_{\odot })\lt 5.5$ ) satellite galaxies of M31 based on deep color–magnitude diagrams constructed from ...
Alessandro Savino +36 more
doaj +1 more source
The Role of Secondary Recoil Leaders in the Formation of Subsequent Return Strokes
Geophysical Research Letters, Volume 52, Issue 2, 28 January 2025.Abstract Recoil leaders develop in lightning flash decayed channels. The propagation of a recoil leader depends on the charges stored at its tip and the conductivity of the decayed channel. When the recoil leader propagates over the entire channel, a subsequent return stroke happens.
Ivan T. Cruz +3 more
wiley +1 more source
CMB signatures of extended reionization [PDF]
New Astronomy Reviews, 2003 To be published in the proceedings of "The Cosmic Microwave Background and its Polarization", New Astronomy Reviews, (eds. S. Hanany and K.A. Olive)
openaire +2 more sources
LYRA. III. The Smallest Reionization Survivors
The Astrophysical Journal, 2022 Abstract The dividing line between galaxies that are quenched by reionization (“relics”) and galaxies that survive reionization (i.e., continue forming stars) is commonly discussed in terms of a halo mass threshold. We probe this threshold in a physically more complete and accurate way than has been possible to date, using five extremely
Thales A. Gutcke +5 more
openaire +3 more sources
Journal of Geophysical Research: Space Physics, Volume 130, Issue 1, January 2025.Abstract We investigate the emission of energetic neutral atoms (ENAs) from the magnetosphere‐atmosphere interactions at Europa and Callisto that may be observed by an ENA imaging instrument. To do so, we combine the draped electromagnetic fields from the AIKEF hybrid model with a tracing tool for the energetic magnetospheric parent ions.
C. Michael Haynes +3 more
wiley +1 more source
, 2003 10 pages, 9 figures, minor revisions, in press, MNRAS 343 (2003) 1101 ...
Ciardi, B., Stoehr, F., White, S. D. M.
openaire +2 more sources
The Effect of Absorption Systems on Cosmic Reionization [PDF]
, 2012 We use large-scale simulations to investigate the morphology of reionization during the final, overlap phase. Our method uses an efficient three-dimensional smoothing technique which takes into account the finite mean free path due to absorption systems,
Abel +25 more
core +2 more sources
Radio Frequency Interference Detection Using Swin Transformer Embedding U2‐Net
Advances in Astronomy, Volume 2025, Issue 1, 2025.Radio frequency interference (RFI) is radio wave interference from natural sources or man‐made models. In radio astronomy research, the signals of celestial objects captured by radio telescopes are extremely weak, and the presence of RFI can significantly mask or distort those signals, reducing the accuracy of observational data and seriously affecting
Shengdi Chen, Bo Liang, Sándor Frey
wiley +1 more source
Reionization and decaying dark matter [PDF]
Physical Review D, 1992 Gunn-Peterson tests suggest that the Universe was reionized after the standard recombination epoch. We present a systematic treatment of the ionization process by deriving the Boltzmann equations appropriate to this regime. A compact solution for the photon spectrum is found in terms of the ionization ratio.
, Dodelson, , Jubas
openaire +2 more sources