Results 111 to 120 of about 3,997 (213)

Exploring Jupiter's Mid‐Latitude Dusk Magnetopause: The Impact of Magnetic Reconnection

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract The Juno mission has elucidated magnetosphere processes, structure, and dynamics via multi‐instrument plasma and magnetic field observations. In this study, these instruments are used to identify magnetic reconnection during the Juno extended mission from a survey of 490 magnetopause crossings at the mid‐latitude southern dusk magnetopause ...
J. Montgomery, P. A. Delamere, A. R. Smith, C. Spitler, G. Fuller, R. W. Ebert, F. Allegrini, S. A. Fuselier, R. J. Wilson   +8 more
wiley   +1 more source

Unveiling the Mixing and Transport Processes of Solar Wind and Planetary Ions in the Magnetopause Boundary Layer

The Astrophysical Journal
Kelvin–Helmholtz (KH) vortices are widely observed in astrophysics and heliophysics, including at Jovian and terrestrial magnetopauses, the Martian sheath–ionosphere boundary, the heliopause, and within stellar accretion disks.
Zhongwei Yang, Can Huang, Xiaocheng Guo, Riku Jarvinen, Binbin Tang, Wence Jiang, Hui Li, Chi Wang   +7 more
doaj   +1 more source

The red giant branch bump in rotating low-mass stars: Implication for the theory of stellar evolution

Astronomy & Astrophysics
Context. The red giant branch bump (RGB bump) is a key diagnostic of an internal stellar structure, yet the impact of stellar rotation– which is a fundamental parameter altering chemical stratification–on its luminosity, amplitude, and morphology remains
Han Zhuo, Song Hanfeng, Meynet Georges, Maeder Andre, Chen Yanhui, Qi Shitao, Zhan Qiong, Qu Xinyue, Zhong Wenli, Duan Chaomi   +9 more
doaj   +1 more source

Seasonal Variations of the Martian Middle‐Atmosphere CO2/Ar Ratio Inferred From MAVEN/NGIMS Observations

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract The carbon dioxide (CO2)/argon (Ar) ratio is a useful tracer of atmospheric circulation on Mars, but it remains observationally poorly constrained in the middle atmosphere, where large‐scale circulation occurs. In this study, we infer the CO2/Ar ratio at the homopause, which marks the upper boundary of the well‐mixed Martian middle atmosphere,
JunFeng Qin, Shannon Curry, Michael S. Chaffin, Yuni Lee, François Forget   +4 more
wiley   +1 more source

Gamma‐Ray Glows Commonly Followed by Lightning: A Statistical Study of the Spatio‐Temporal Relationship

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Gamma‐ray glows are prolonged enhancements of gamma rays from thunderclouds, which are often linked to large‐scale electric fields rather than individual lightning. The link between glows and lightning remains poorly understood. Here, we analyzed 300 glows observed during the ALOFT aircraft campaign and optical lightning detected by GLM.
Chu‐Nan Zhang, Yunjiao Pu, Steven Cummer, Martino Marisaldi, Nikolai Østgaard, Andrey Mezentsev, Ingrid Bjørge‐Engeland, Øystein Håvard Færder, David Alexandre Stephan Sarria, Nikolai G. Lehtinen, Anders Nødland Fuglestad   +10 more
wiley   +1 more source

Hide and seek : radial-velocity searches for planets around active stars [PDF]

, 2015
The detection of low-mass extra-solar planets through radial-velocity searches is currently limited by the intrinsic magnetic activity of the host stars.
Haywood, Raphaëlle D.
core   +1 more source

PUH Stellar Planck Core Observational Lead Note — Ten Lines of Anomalous Astrophysical Evidence Unified by the Planck Core Hypothesis: From Solar Polar Features to JWST Little Red Dots to VASCO Disappearances, with T213 Equal-Rate Geometry as the Unifying Mechanism

PUH Stellar Planck Core Observational Lead Note. Identifies ten lines of anomalous astrophysical evidence collectively unified by the PUH Planck core hypothesis. The unifying mechanism is T213 Equal-Rate Theorem (folding = unfolding per unit surface area, single substrate rate R_sub) combined with T210 rate-limit framework (gravitational infall is ...
openaire   +2 more sources

Stellar Population Astrophysics (SPA) with TNG : Fluorine abundances in seven open clusters

Context. The age, evolution, and chemical properties of the Galactic disk can be effectively ascertained using open clusters. Within the large program Stellar Populations Astrophysics at the Telescopio Nazionale Galileo, we specifically focused on stars ...
A. Karakas, Jönsson, Henrik,, Nandakumar, G.,, Jönsson, Henrik, Sanna, N., Seshashayana, S. Bijavara, G. Nandakumar, Spitoni, E.,, L. Origlia, D. Romano, Karakas, A., Nandakumar, G., E. Spitoni, E. Oliva, Lugaro, M., M. Lugaro, Karakas, A.,, Bragaglia, A., V. D’Orazi, Romano, D., Jönsson, H.,, Seshashayana, S. Bijavara,, Oliva, E., Bragaglia, A.,, A. Bragaglia, N. Sanna, S. Bijavara Seshashayana, D'Orazi, V.,, Sanna, N.,, Lugaro, M.,, D'Orazi, V., Jönsson, H., Origlia, L., Origlia, L.,, H. Jönsson, Spitoni, E., D’Orazi, valentina, Bijavara Seshashayana, Shilpa,, Bijavara Seshashayana, Shilpa, Lund University., Oliva, E.,, Romano, D.,   +41 more
core   +1 more source

Radio Sounding Determination of Two‐Dimensional Plasma Structure Velocity

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract The Mars spacecraft Tianwen‐1 transmitted radio signals to Earth for its orbit determination. The frequencies of the radio signals exhibited sharp variations when an ICME passed through the Mars‐Earth signal path on 18 June 2021. These sharp variations were observed at different ground stations at different times. This was most probably caused
Qingbao He, Qinghui Liu, Yongzhang Yang
wiley   +1 more source

Asteroseismology of the Nearby K Dwarf σ Draconis Using the Keck Planet Finder and TESS

The Astrophysical Journal
Asteroseismology of dwarf stars cooler than the Sun is very challenging owing to the low amplitudes and rapid timescales of oscillations. Here we present the asteroseismic detection of solar-like oscillations at 4-minute timescales ( ${\nu }_{\max }\sim ...
Marc Hon, Daniel Huber, Yaguang Li, Travis S. Metcalfe, Timothy R. Bedding, Joel Ong, Ashley Chontos, Ryan Rubenzahl, Samuel Halverson, Rafael A. García, Hans Kjeldsen, Dennis Stello, Daniel R. Hey, Tiago Campante, Andrew W. Howard, Steven R. Gibson, Kodi Rider, Arpita Roy, Ashley D. Baker, Jerry Edelstein, Chris Smith, Benjamin J. Fulton, Josh Walawender, Max Brodheim, Matt Brown, Dwight Chan, Fei Dai, William Deich, Colby Gottschalk, Jason Grillo, Dave Hale, Grant M. Hill, Bradford Holden, Aaron Householder, Howard Isaacson, Yuzo Ishikawa, Sharon R. Jelinsky, Marc Kassis, Stephen Kaye, Russ Laher, Kyle Lanclos, Chien-Hsiu Lee, Scott Lilley, Ben McCarney, Timothy N. Miller, Joel Payne, Erik A. Petigura, Claire Poppett, Michael Raffanti, Constance Rockosi, Dale Sanford, Christian Schwab, Abby P. Shaum, Martin M. Sirk, Roger Smith, Jim Thorne, John Valliant, Adam Vandenberg, Shin Ywan Wang, Edward Wishnow, Truman Wold, Sherry Yeh, Ashley Baker, Sarbani Basu, Megan Bedell, Heather M. Cegla, Ian Crossfield, Courtney Dressing, Xavier Dumusque, Heather Knutson, Dimitri Mawet, John O’Meara, Guđmundur Stefánsson, Johanna Teske, Gautam Vasisht, Sharon Xuesong Wang, Lauren M. Weiss, Joshua N. Winn, Jason T. Wright   +78 more
doaj   +1 more source