Results 111 to 120 of about 1,302 (205)
Quantifying the Active Galactic Nucleus Fraction in Cosmic Voids via Mid-infrared Variability
The Astrophysical JournalObservations and theoretical simulations suggest that the large-scale environment plays a significant role in how galaxies form and evolve and, in particular, whether and when galaxies host an actively accreting supermassive black hole in their center (i.
Anish S. Aradhey +3 more
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Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.Abstract Nowadays, Mars presents an environment characterized by low atmospheric pressure (∼6 mbar), which profoundly alters water‐driven surface processes known from Earth. Under these conditions, water rapidly boils, cools, and stabilizes near the triple point, often freezing, which strongly limits its ability to transport sediment.
Ondřej Krýza +7 more
wiley +1 more source
Continuum Reverberation Mapping of 18 Active Galactic Nuclei over 4 Yr
The Astrophysical JournalContinuum reverberation mapping probes the size scale of the optical continuum-emitting region in active galactic nuclei (AGN). The source of this emission has long been thought to originate from the accretion disk, but recent studies suggest the broad ...
Jake A. Miller +6 more
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Astronomy & AstrophysicsSince the discovery of active galactic nuclei (AGN), their light curves have proved to be intrinsically variable. In the optical/UV band, this variability is consistent with correlated or red noise and is particularly well described by the damped random ...
Bertassi Lorenzo +4 more
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Deep Origin and Shallow Launch for the Etna 122 B.C. Mafic Plinian Eruption
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.Abstract Basaltic Plinian eruptions challenge our understanding of explosive volcanism. The 122 B.C. Plinian eruption of Etna ranks among the most powerful mafic explosive events known. Here, we combine volatile barometry of 122 B.C. from olivine‐hosted melt and fluid inclusions with comparative data from the sub‐Plinian Fall Stratified eruption at ...
M. Gavrilenko +6 more
wiley +1 more source
Martian Proton Albedo as Signature of Near‐Surface Water
Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.Abstract Understanding the Martian soil water budget is crucial not only for in situ resource utilization in future human missions to Mars, but also for reconstructing the geological and climatic history of the planet, as well as to assess the potential of ancient or even present microbial life.
Jan Leo Löwe +13 more
wiley +1 more source
A Systematic Search for Active Galactic Nucleus Flares in ZTF Data Release 23
The Astrophysical Journal Supplement SeriesActive galactic nuclei (AGNs) are known to exhibit stochastic variability across a wide range of timescales and wavelengths. AGN flares are extreme outbursts that deviate from this typical behavior and may trace a range of energetic physical processes ...
Lei He +15 more
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Thermal Escape of Atomic Hydrogen on Mars: A Comprehensive View With a General Circulation Model
Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.Abstract Mars loses water mainly through the photodissociation of water vapor, followed by the thermal escape of light hydrogen atoms. Observations have revealed large seasonal variations in hydrogen concentration in the upper thermosphere, peaking during southern summers and intensifying during dust storms.
Alexander S. Medvedev, Ngan H. D. Trinh
wiley +1 more source
The Astrophysical JournalRelativistic jets launched from stellar-mass compact objects embedded in the accretion disk of an active galactic nucleus (AGN) can produce nonthermal emission upon successfully breaking out of the disk. In this paper, we present a comprehensive study of
Ken Chen, Zi-Gao Dai
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