Results 101 to 110 of about 60,808,388 (219)

Towards precision cosmology from large-scale structure of the universe

, 2021
The last decade has seen a tremendous improvement in theoretical understanding of galaxy clustering on cosmological scales, which culminated in recent CMB-independent measurement of cosmological parameters from spectroscopic galaxy surveys.
Simonovic, Marko
core  

Current Sheet Geometry and Heavy Ion Influence on Reconnection

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract In some planetary magnetospheres singly ionized heavy ion species can be found in addition to the typical hydrogen. The presence of these ions can affect many magnetospheric processes. The role heavy ions, specifically oxygen, and the thickness of the current sheet play in magnetic reconnection is investigated using particle‐in‐cell ...
Cristian R. Radulescu, Daniel Verscharen, Yuto Katoh, Yohei Kawazura, Seiji Zenitani, Andrew J. Coates, Yasumasa Kasaba   +6 more
wiley   +1 more source

Earthward O+ Injections in the Plasma Sheet Boundary Layer During Geomagnetic Storms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract During geomagnetic storms, energetic ions are injected from the Earth's magnetotail along the plasma sheet boundary layer (PSBL). Owing to its off‐equatorial inclined orbit, the Arase satellite is in a prime position to observe these injections in the PSBL on the nightside at the apogee.
M. M. H. Kalliokoski, L. M. Kistler, K. Asamura, S. Kasahara, Y. Miyoshi, K. Keika, T. Hori, A. Matsuoka, K. Yamamoto, J. Liao   +9 more
wiley   +1 more source

Coupled Thermosphere–Ionosphere Dynamics During the 17 January 2013 Storm: GITM–TIDAS Comparison With Millstone Hill ISR Measurements

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This article analyzes a weak geomagnetic storm on January 17–18, 2013, using a first‐principles model (Global Ionosphere Thermosphere Model (GITM) with an empirical assimilative ionospheric model (TIDAS), evaluated against observations in the form of Millstone Hill (MH) incoherent scatter radar (ISR) altitude profiles and global navigation ...
Onyinye Nwankwo‐Omoloja, Aaron J. Ridley, Shun‐Rong Zhang, Philip J. Erickson   +3 more
wiley   +1 more source

The Atacama Cosmology Telescope: Cosmology from Cross-correlations of unWISE Galaxies and ACT DR6 CMB Lensing

The Astrophysical Journal
We present tomographic measurements of structure growth using cross-correlations of Atacama Cosmology Telescope (ACT) DR6 and Planck cosmic microwave background (CMB) lensing maps with the unWISE Blue and Green galaxy samples, which span the redshift ...
Gerrit S. Farren, Alex Krolewski, Niall MacCrann, Simone Ferraro, Irene Abril-Cabezas, Rui An, Zachary Atkins, Nicholas Battaglia, J. Richard Bond, Erminia Calabrese, Steve K. Choi, Omar Darwish, Mark J. Devlin, Adriaan J. Duivenvoorden, Jo Dunkley, J. Colin Hill, Matt Hilton, Kevin M. Huffenberger, Joshua Kim, Thibaut Louis, Mathew S. Madhavacheril, Gabriela A. Marques, Jeff McMahon, Kavilan Moodley, Lyman A. Page, Bruce Partridge, Frank J. Qu, Emmanuel Schaan, Neelima Sehgal, Blake D. Sherwin, Cristóbal Sifón, Suzanne T. Staggs, Alexander Van Engelen, Cristian Vargas, Lukas Wenzl, Martin White, Edward J. Wollack   +36 more
doaj   +1 more source

Conformal (In)Equality

EPJ Web of Conferences, 2018
The current accelerating expansion of the Universe is explained either by dark energy or by modified gravity theories. Both of them can explain exactly the same background evolution of the Universe, however this degeneracy may be broken when the ...
Hyun Young-Hwan, Kim Yoonbai, Lee Seokcheon   +2 more
doaj   +1 more source

Constraining dark energy using real and mock galaxy surveys [PDF]

, 2009
In this thesis, we study how dark energy may be constrained by measurements of large-scale clustering in future galaxy surveys, and through the imprint of a time-varying large-scale potential on the CMB (the integrated Sachs-Wolfe effect).
CAI, YANCHUAN
core  

Features of Ground Level Enhancement (GLE #74) Event on 11 May 2024

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract Ground Level Enhancement (GLE #74) occurred on 11 May 2024 following an X5.8 solar flare from active region AR 13668 and the associated halo coronal mass ejection. The event was observed by both ground‐based neutron monitors (NMs) and space‐borne instruments and occurred during a deep Forbush decrease and one of the strongest geomagnetic ...
Alexander Mishev, Nicholas Larsen, Sergey Koldobskiy, Hishashi Hayakawa, Yusuke Ebihara, Ilya Usoskin   +5 more
wiley   +1 more source

The Redshift-space Momentum Power Spectrum. III. Measuring the Growth Rate from the SDSSv Survey Using the Auto- and Cross-power Spectrum of the Galaxy Density and Momentum Fields

The Astrophysical Journal
The large-scale structure of the Universe and its evolution over time contains an abundance of cosmological information. One way to unlock this is by measuring the density and momentum power spectrum from the positions and peculiar velocities of galaxies
Fei Qin, Cullan Howlett, David Parkinson
doaj   +1 more source

Electron‐Impact Excitation of N2 Is Insufficient to Produce the NO2 Continuum in STEVE

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract The most studied hypothesis for the continuum emission of Strong Thermal Emission Velocity Enhancement (STEVE) is the NO2 ${\text{NO}}_{2}$ continuum. The ion‐impact pathway for this emission was recently shown to be too slow by a few orders of magnitude. In this work, we evaluate the electron‐impact pathway.
Brian J. Harding, L. Claire Gasque
wiley   +1 more source