Results 61 to 70 of about 927 (171)

Characterization of Mercury's Atomic and Molecular Hydrogen Exosphere and the First Detection of H2 Ions

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract From 1974 to 1975, the Mariner 10 spacecraft studied Mercury's environment during three flybys and detected hydrogen, helium, and possibly atomic oxygen in the exosphere using its ultraviolet spectrometer, but no molecular hydrogen. Based on the sensitivity of the occultation instrument, an upper limit for the H2 ${\mathrm{H}}_{2}$ surface ...
F. Weichbold, D. Schmid, H. Lammer, M. Volwerk, M. Scherf, N. V. Erkaev, A. Varsani, C. Simon Wedlund, C. Mazelle   +8 more
wiley   +1 more source

Tracing grain growth in the forming prestellar core L1506C with 3D modeling of Herschel, IRAM, and CFHT observations

Astronomy & Astrophysics
Context. In the early phases of star formation, dense and cold structures such as filaments and prestellar cores are commonly probed and studied via observations of thermal dust emission.
Zhu E., Ristorcelli I., Demyk K., Juvela M., Ysard N., Paradis D., Roussel H., Kiviaho W.   +7 more
doaj   +1 more source

Kinetic Structure of an Interplanetary Shock Observed at Two Heliocentric Longitudes

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Collisionless shocks convert bulk flow energy into heat, electromagnetic fields, and non‐thermal particle populations. Recent studies suggest that downstream magnetic oscillations could play an important role in ion‐scale energy dissipation at low‐Mach‐number shocks; however, the specific shock and plasma parameters involved remain poorly ...
J. J. Boldú, D. B. Graham, M. Morooka, M. André, Yu. V. Khotyaintsev, A. Dimmock, A. Lalti, D. Píša, J. Souček, M. Maksimovic, P. Louarn, A. Fedorov, C. J. Owen   +12 more
wiley   +1 more source

Reconstructing the Geometry of a Hot Flow Anomaly With Bounding Jets in Magnetosheath

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract When interplanetary magnetic field discontinuities interact with planetary bow shocks, hot flow anomalies (HFAs) form in the solar wind and can extend into the magnetosheath. Here we reconstruct the three‐dimensional geometry of an HFA bounded by two jet regions in the terrestrial magnetosheath.
Yufei Zhou, Boyi Wang, Savvas Raptis, Shan Wang, Jin Guo, Jih‐Hong Shue, David Sibeck, Quanming Lu, Jiamei Zhang, Chao Shen, Rungployphan Kieokaew, C. Philippe Escoubet, Peng Shao, James Burch   +13 more
wiley   +1 more source

A Novel Neural Network‐Based Approach to Derive a Local Geomagnetic Baseline for Future Robust Characterization of Geomagnetic Indices at Mid‐Latitude

Space Weather
Geomagnetic indices derived from ground magnetic measurements characterize the intensity of solar‐terrestrial interaction. Global magnetic indices derived from multiple magnetic observatories at mid‐latitude have commonly been used for space weather ...
Rungployphan Kieokaew, Veronika Haberle, Aurélie Marchaudon, Pierre‐Louis Blelly, Aude Chambodut   +4 more
doaj   +1 more source

A Statistical Retrieval of Cloud Parameters for the Millimeter Wave Ice Cloud Imager on Board MetOp-SG

IEEE Access, 2017
The meteorological observations from satellites in the microwave domain are currently limited to below 190 GHz. The next generation of European Organization for the Exploitation of Meteorological Satellites Polar System-Second Generation will carry an ...
Die Wang, Catherine Prigent, Filipe Aires, Carlos Jimenez   +3 more
doaj   +1 more source

SPECTROPHOTOMÈTRE INTERFÉRENTIEL EN ASTROPHYSIQUE

Le Journal de Physique Colloques, 1967
Etude des problèmes rencontrés dans l'adaptation d'un étalon Fabry-Perot à un télescope, et des causes d'erreurs particulières dues au défaut d'uniformité d'éclairement des diaphragmes. Présentation de quelques résultats (rapport d'intensité de raies de [O II] dans la nébuleuse d'Orion).
openaire   +1 more source

Evidence of an Extended Alfvén Wing System at Enceladus: Cassini's Multi‐Instrument Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract We report in situ evidence for Enceladus' Alfvén wing system and its coupling with Saturn's ionosphere, based on multi‐instrument observations from the Cassini spacecraft. Analysis of 36 events, including 13 from non‐flyby paths, confirms the existence of a Main Alfvén Wing (MAW) current system generated at Enceladus, and associated Reflected ...
L. Z. Hadid, T. Chust, J.‐E. Wahlund, M. W. Morooka, E. Roussos, O. Witasse, J. Rabia, D. Pisa, K. Kim, N. J. T. Edberg, A. M. Rymer, L. Lamy, S. Kotsiaros, S. Aizawa, A. Jeandet, R. Modolo, N. André, P. Canu, C. F. Bowers, X. Jia, A. J. Coates, G. H. Jones, A. Parsec‐Wallis, O. Agiwal, M. K. G. Holmberg, Q. Nénon, H. Cao, W. S. Kurth, M. K. Dougherty   +28 more
wiley   +1 more source

Towards Doppler eclipse mapping of hot Jupiters

Astronomy & Astrophysics
Context. In the last decade, ground-based high-resolution spectroscopy (HRS) has emerged as a powerful method to probe exoplanet atmospheres both in transit and thermal emission.
Yariv V., Bonfils X., Cowan N., Forveille T., Debras F., Carmona A., Delfosse X., Masson A., Parmentier V., Allart R.   +9 more
doaj   +1 more source

Robustness of dark matter constraints and interplay with collider searches for New Physics

Journal of High Energy Physics, 2017
We study the implications of dark matter searches, together with collider constraints, on the phenomenological MSSM with neutralino dark matter and focus on the consequences of the related uncertainties in some detail. We consider, inter alia, the latest
A. Arbey, M. Boudaud, F. Mahmoudi, G. Robbins   +3 more
doaj   +1 more source