Results 81 to 90 of about 88,144 (207)

The dynamic universe: realizing the potential of classical time domain and multimessenger astrophysics

Frontiers in Astronomy and Space Sciences
In parallel with the multi-messenger revolution, major advances in time-domain astronomy across multiple science disciplines relevant to astrophysics are becoming more urgent to address.
R. Sambruna, J. Racusin, Eric Perlman, S. B. Howell, SB Howell, D. Howell, R. Street, M. Soares-Furtado, TP Greene, D. Howell, R. Street, Brian Jackson, Thomas P. Greene   +12 more
semanticscholar   +1 more source

Statistical Analysis of Storm‐Time O+ Outflows as Observed by the Van Allen Probes

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract The outflow of low‐energy O+ ${\mathrm{O}}^{+}$ ions into inner magnetosphere is a key contributor to the warm plasma cloak, and O+ torus, which can also contribute to storm time ring current particularly after local acceleration. Although O+ ${\mathrm{O}}^{+}$ outflows are well observed, their source and transport in the inner magnetosphere ...
Aditi Upadhyay, Matina Gkioulidou, Shin‐ichi Ohtani, Ian J. Cohen   +3 more
wiley   +1 more source

Measuring mean densities of delta Scuti stars with asteroseismology. Theoretical properties of large separations using TOUCAN

, 2014
We aim at studying the theoretical properties of the regular spacings found in the oscillation spectra of delta Scuti stars. We performed a multi-variable analysis covering a wide range of stellar structure and seismic properties and model parameters ...
A. García Hernández, A. Moya, Antoci, Baglin, Breger, Breger, Breger, C. Rodrigo, Catala, Christensen-Dalsgaard, Dupret, Dziembowski, Dziembowski, E. Solano, García Hernández, García Hernández, Gilliland, Gough, Goupil, Handler, J. C. Suárez, J. R. Rodón, Jackson, Kallinger, Kjeldsen, Lebreton, Lignières, Lignières, MacGregor, Mantegazza, Matthews, Metcalfe, Morel, Morel, Moya, Moya, Moya, Moya, Moya, Paxton, Perryman, Poretti, Poretti, Poretti, R. Garrido, Reese, Reese, Reese, Reese, Soufi, Suárez, Suárez, Suárez, Suárez, Tassoul, Tingley, Uytterhoeven, Uytterhoeven, Walker, Winn, Wright, Zahn, Zwintz   +62 more
core   +1 more source

Correlation Patterns of Muon Flux With Vertical Atmospheric Profiles: Insights From Monte Carlo Simulations

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract The production, attenuation, and absorption of secondary cosmic rays (SCR) are influenced by atmospheric parameters such as air pressure and temperature. To reliably correlate SCR flux measurements with atmospheric ionization driven by energetic particle precipitation, these dependencies must be quantified.
A. Al‐Qaaod, V. Pierrard, A. Winant, U. Stolzenberg, I. Ambrozova, M. Sommer, J. Slegl, J. Solc, A. Gkikoudi, A. G. Georgakilas, A. Papayannis, F. S. Krasniqi   +11 more
wiley   +1 more source

The South African Astronomical Observatory [PDF]

Topics discussed in the Overview of Year 1988 include the following: Supernova in the Large Magellanic Cloud; Galaxies; Ground based observations of celestial x ray sources; the Magellanic Clouds; Pulsating variables; Galactic structure; Binary star ...

core   +1 more source

Omega Bands as a Source of Large dB/dt in the Dawn Sector

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract Omega band activity has the potential to cause geomagnetically induced currents as they can cause large values of dB/dt $\mathrm{d}B/\mathrm{d}t$. We have undertaken a multi‐instrument study of an omega event which occurred from 13 to 14 November 2012, during a period of southward IMF. Measurements from the European Incoherent SCATter (EISCAT)
R. M. Hodnett, S. E. Milan, S. Nozawa, T. Raita, J. W. Gjerloev, S. K. Vines, L. J. Paxton   +6 more
wiley   +1 more source

Spatial Variability and Correlation Lengths Within Stream Interaction Regions at 1 au: Comparison Between ACE and Wind

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract Understanding the spatial variability and correlation lengths throughout Stream Interaction Regions (SIRs) has importance both for fundamentally understanding the structuring of the solar wind and SIRs and for space weather operations. SIR observations from Advanced Composition Explorer and Wind are utilized to characterize the spatial ...
R. C. Allen, V. Toy‐Edens, S. K. Vines, S. Eriksson, J. M. Raines, S. Lepri, G. Li, Y. Wu, A. Russell, G. C. Ho   +9 more
wiley   +1 more source

APXS Derived Geochemistry of Shallow Water Lens Bodies Within the Mirador Formation, Gale Crater, Mars—Evidence for Intermittent Wet Periods and Implications for the Water Record

Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.
Abstract The Mount Sharp group in Gale crater is typically interpreted to record a progressive change (with increasing elevation) from wetter fluvio‐lacustrine environments to dry, eolian environments. This shift has been linked to orbital evidence for a global change in environmental and depositional conditions leading to an overall drying out of Mars.
C. D. O’Connell‐Cooper, L. M. Thompson, J. G. Spray, S. J. VanBommel, J. A. Berger, R. Gellert, G. Caravaca, D. Fey, M. A. McCraig, N. I. Boyd, A. B. Bryk, W. E. Dietrich, S. Gupta, A. Roberts, A. Yen   +14 more
wiley   +1 more source

Effects of Mineralogy and UV Radiation on the Detectability of Amino Acids Within the Martian Regolith: The Case for a Combined Chromatographical and Spectroscopical Approach

Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.
Abstract Amino acids are an extremely heterogeneous group of biomolecules essential for life on Earth. Their biosignatures are expected to be easily degraded on the Martian surface as the absence of a thick atmosphere and a magnetosphere leads to most of the solar radiation directly reaching its surface.
Miguel Arribas Tiemblo, Pedro Rayo, María‐Paz Martín‐Redondo, Felipe Gómez   +3 more
wiley   +1 more source

Modeling of Magnetic Local Time Asymmetry in Storm‐Time Low‐Latitude Geomagnetic Field Disturbances Due To Partial Ring Current

Space Weather, Volume 23, Issue 11, November 2025.
Abstract The intensity of storm‐time disturbance in the ground magnetic field varies significantly at different longitudes due to the magnetic local time (MLT) dependent contributions from different magnetospheric and ionospheric currents. Local geomagnetic field disturbances at low‐to‐mid latitudes often deviate considerably from the global depression
S. Tulasi Ram, Deeksha Rai, B. Nilam, A. P. Dimri, V. Sai Gowtam, Anil Raghav, V. Manu, N. Balan   +7 more
wiley   +1 more source