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Study of Sudden Magnetic Storm Commencement from Observations with Second Time Resolution
Fainshtein, V. G.; Gromova, L. I.; Gromov, S. V. +1 more
The article presents the results of a studying detection of the sudden commencement (SC) and main impulse (MI) of a magnetic storm as a function of the geographic coordinates of magnetic observatories and Universal Time, using modern data with second time resolution. The analysis was carried out for two events in which an interplanetary shock wave…
On the Possible Mechanisms of the SEP Event and Electron Enhancement over the SEP Decay Phase on 2023 August 5
Gan, W. Q.; Li, Y. P.; Firoz, Kazi A.
We carry out this study on the solar energetic particle (SEP) event that occurred on 2023 August 5 over the ascending phase of the current solar cycle 25. It is found that the SEP event might have been initiated by the M1.6 flare, while the SEP peak was caused by the coronal shock manifested in DH-type II radio burst over the propagation phase of …
Evaluating Proton Intensities for the SMILE Mission
Escoubet, C. P.; Kronberg, Elena A.; Mischel, Simon
This study introduces five linear regression models developed to accurately predict proton intensities in the critical energy range of 92.2–159.7 keV. To achieve this task we utilized 14 years of data sourced from the Cluster's RAPID experiment and NASA's OMNI database. This data was then aligned with the Solar wind-Magnetosphere-Ionosphere Link E…
An In-depth Analysis of Quiet-Sun IRIS Brightenings
Morgan, Huw; Humphries, Llŷr Dafydd; Kuridze, David
Small-scale brightenings are ubiquitous, dynamic, and energetic phenomena found in the chromosphere. An advanced filter-detection algorithm applied to high-resolution observations from the Interface Region Imaging Spectrograph enables the detection of these brightenings close to the noise level. This algorithm also tracks the movement of these bri…
z-GAL: A NOEMA spectroscopic redshift survey of bright Herschel galaxies. I. Overview (Corrigendum)
Berta, S.; Omont, A.; Buat, V. +35 more
Zone of Preferential Heating for Minor Ions in the Solar Wind
Klein, Kristopher G.; Kasper, Justin; Lepri, Susan T. +2 more
The properties of minor ions in the solar wind are important indicators of the state of the solar corona and the heating processes it undergoes as it expands. Evidence of preferential heating of minor ions has been observed in the solar wind, and is believed to be active up to a certain radial boundary, beyond which thermalization due to Coulomb c…
Spectroscopic and Photometric Confirmation of 3 Globular and 14 Intermediate-age Clusters in the Irr II Galaxy NGC 3077
Mayya, Y. D.; Rosa-González, D.; Rodríguez-Merino, L. H. +4 more
We present the results from spectroscopic and photometric analysis of 17 globular cluster (GC) candidates in the Irr II galaxy NGC 3077. The GC candidates were selected on the Hubble Space Telescope images and were cleaned of foreground Galatic stars using the GAIA parameters. We carried out aperture photometry using the multiband archival images …
Further lunar occultations results from the Trebur Observatory, 2021–24
Ohlert, J. M.; Richichi, A.
Following up on our initial paper (Richichi and Ohlert, 2021), we report here on 60 lunar occultation events recorded between February 2021 and March 2024 at the Michael Adrian Observatorium. An improved version of the detector was employed for the present work. The program aims mainly at the direct measurement of the angular diameter of late-type…
Reevaluating the Origin of Detectable Cataclysmic Variables in Globular Clusters: Testing the Importance of Dynamics
Belloni, Diogo; Rivera Sandoval, Liliana; Ramos Arevalo, Miriam
Based on the current detectable cataclysmic variable (CV) population in Galactic globular clusters (GCs), we show that there is not a clear relation between the number of sources per unit of mass and the stellar encounter rate, the cluster mass, or the cluster central density. If any, only in the case of core-collapsed GCs could there be an antico…
Addendum to "Description, accessibility and usage of SOIR/Venus Express atmospheric profiles of Venus distributed in VESPA (Virtual European Solar and Planetary Access)"
Vandaele, A. C.; Thomas, I. R.; Trompet, L. +9 more
The reference paper describing the SOIR data service available through the VESPA portal is Trompet et al. (2018). This data service contains an updated version of the profiles already available previously for AERO (aerosols), CO2, CO, H35Cl, H37Cl, HF, SO2, H2O, and HDO following Mahieux et al…