Results 61 to 70 of about 115,141 (206)
Galaxy clusters as astrophysical laboratories and probes of cosmology [PDF]
, 2014 Galaxy clusters are the most recent of cosmological structures to have formed by the present time in the currently favoured hierarchical scenario of structure formation and are widely regarded as powerful probes of cosmology and galaxy formation physics alike.
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Earth and Space Science, Volume 12, Issue 8, August 2025.Abstract This study presents a validated design of a dual‐band wireless relay system of “pucks” for through‐ice communication between a cryobot and a surface lander during a future exploration of the Europan cryosphere. The design of a terrestrial demonstration system and the results of a 103 m through‐ice system test in a relevant environment near ...
Jake Sahli +6 more
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Journal of Geophysical Research: Space Physics, Volume 130, Issue 8, August 2025.Abstract The flux of galactic cosmic rays (GCRs) is modulated by solar activity on different time scales. This is often described with the force‐field approximation via the single variable parameters of the modulation parameter, which formally corresponds to the average rigidity loss of GCR particles in the heliosphere. The force‐field approximation is
Pauli Väisänen +5 more
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Giant radio galaxies as probes of the ambient WHIM in the era of the SKA
, 2015 The missing baryons are usually thought to reside in galaxy filaments as warm-hot intergalactic medium (WHIM). From previous studies, giant radio galaxies are usually associated with galaxy groups, which normally trace the WHIM.
Chen, Ru-Rong, Peng, Bo, Strom, Richard
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Quantifying Imperfect Cognition Via Achieved Information Gain
Annalen der Physik, Volume 537, Issue 7, July 2025.Cognition, the processing of information in the form of inference, communication, and memorization, is the central activity of any intelligence. To quantify imperfect cognition, the concept of achieved information gain (AIG) is introduced. AIG can be derived axiomatically, allows cognitive fidelity and efficiency to be defined mathematically, and ...
Torsten Enßlin
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Zehn Jahre Gaia‐Messungen: Die hochgenaue Kartierung des Himmels
Physik in unserer Zeit, Volume 56, Issue 4, Page 175-183, July 2025.Das astrometrische Weltraumobservatorium Gaia der Europäischen Weltraumorganisation hat die astrometrische Forschung revolutioniert, indem es unter anderem präzise Positionen, Bewegungen und Entfernungen von fast zwei Milliarden Himmelsobjekten gemessen hat. Damit stellt es wertvolle Daten für fast alle Gebiete der Astrophysik bereit. Nach dem Ende der
Stefan Jordan
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Astrophysically motivated bulge-disc decompositions of Sloan Digital Sky Survey galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 28 pages, 34 figures, MNRAS ...
J. E. Gunn, C. N. Lackner
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Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade
Radio Science, Volume 60, Issue 7, July 2025.Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park +13 more
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Cross-correlation of the astrophysical gravitational-wave background with galaxy clustering
Physical Review D, 2020 We investigate the correlation between the distribution of galaxies and the predicted gravitational-wave background of astrophysical origin. We show that the large angular scale anisotropies of this background are dominated by nearby non-linear structure, which depends on the notoriously hard to model galaxy power spectrum at small scales. In contrast,
Valeri Vardanyan +3 more
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Estimation of Reconnection Rate From Soft X‐Ray Emission at the Earth's Dayside Magnetopause
Geophysical Research Letters, Volume 52, Issue 12, 28 June 2025.Abstract We propose an approach to estimating the reconnection rate by utilizing soft X‐rays emitted during the solar wind charge exchange (SWCX) process at the Earth's magnetopause. Employing a high‐resolution global magnetohydrodynamic (MHD) simulation model of the magnetosphere, we investigated the SWCX emission around the magnetopause during a ...
Ryota Momose +2 more
wiley +1 more source