Results 91 to 100 of about 5,163,973 (225)
Collisionless Shocks: Contemporary State After Three Quarters of a Century of Research
Reviews of Geophysics, Volume 64, Issue 3, September 2026.Abstract The collisionless shock research started in the late 1950s. Since then, plenty of data have been accumulated due to the large number of missions in the heliosphere, providing in situ measurements of the fields and particles. The quality of these measurements has vastly improved, especially in the last two decades.
M. Gedalin +2 more
wiley +1 more source
The Astrophysical JournalJellyfish galaxies, which exhibit tails of gas opposite to their direction of motion, are a galaxy population showcasing the most extreme effects of ram pressure stripping (RPS).
Lauren M. Foster +8 more
doaj +1 more source
Can Solar Cyclic Variability Mimic Extreme Solar Particle (Miyake) Events in Radiocarbon?
Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.Abstract Rapid, strong enhancements in Δ14 ${{\Delta }}^{14}$C in the Earth's atmosphere, known as Miyake events, rarely occurred over the past millennia, pointing to major radiation storms affecting Earth. They are produced by extreme solar particle events (ESPEs) and are separated by an order‐of‐magnitude gap in the strength from directly observed ...
Ilya Usoskin +2 more
wiley +1 more source
Mid-infrared Ensemble Variability of Broad-line and Narrow-line Seyfert 1 Galaxies
The Astrophysical JournalWe utilized multiepoch archival data from the Wide-field Infrared Survey Explorer to compare the variability at 3.4 μ m (W1 band) and 4.6 μ m (W2 band) of broad-line Seyfert 1 (BLSy1) galaxies and narrow-line Seyfert 1 (NLSy1) galaxies by employing the ...
Zhipeng Hu, Lisheng Mao
doaj +1 more source
MOSDEF-3D: Keck/OSIRIS Maps of the Ionized Interstellar Medium in z ∼ 2 Galaxies
The Astrophysical JournalWe present spatially resolved rest-frame optical emission line maps of four galaxies at z ∼ 2 observed with the Keck/OH-Suppressing Infra-Red Imaging Spectrograph to study the physical conditions of the interstellar medium (ISM) at cosmic noon.
Natalie Lam +10 more
doaj +1 more source
Spectrophotometry of three emission-line galaxies.
The Astrophysical Journal, 1973 Spectrophotometric data concerning three blue emission-line galaxies were obtained from image-tube spectrograms secured with the 84-inch reflector of the Kitt Peak National Observatory. Analysis of these data indicated a level of excitation similar to that of low- or moderate-excitation galactic H II regions.
openaire +1 more source
UNCOVERing the High-redshift AGN Population among Extreme UV Line Emitters
The Astrophysical JournalJWST has revealed diverse new populations of high-redshift ( z ∼ 4–11) active galactic nuclei (AGNs) and extreme star-forming galaxies that challenge current photoionization models.
Helena Treiber +25 more
doaj +1 more source
A NOEMA pilot survey of [C II] line emission in luminous galaxies at z ≈ 6
Astronomy & AstrophysicsWe present Northern Extended Millimeter Array (NOEMA) observations of four luminous galaxies at z ∼ 6, when the Universe was less than ∼1 Gyr old. These galaxies are detected in the [C II] 158 μm fine-structure line, and three also exhibit underlying ...
Martínez-Cuadra B. +11 more
doaj +1 more source
Emission line profiles and X-ray observations of broad and narrow line Seyfert 1 galaxies
, 2011 Narrow Line Seyfert 1 galaxies represent a distinct category in the larger family of Type 1 Active Galactic Nuclei. The occurrence of emission line profiles not broader than 2000 km/s, combined with luminosity estimates comparable to those of their broad
CIROI, STEFANO +5 more
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Galáxias post-starburst no universo local [PDF]
, 2014 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Física, Florianópolis, 2014Galáxias post-starburst (PSB) apresentam espectros com fortes linhas de absorção na série ...
Werle, Ariel
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