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Multistage ice-damming of volcanic flows and fluvial systems in Northeast Syrtis Major
Mustard, J. F.; Skok, J. R.; Matherne, Connor +2 more
The northeast edge of the Syrtis Major volcanic complex records a diverse history of volcanism and climate of early Mars which has long been argued to be dominated by icy or wet conditions. This region contains a stratigraphic record that spans the period of phyllosilicate secondary mineralogy from moderate pH alteration of the Early Noachian crus…
Using Stereoscopic Observations of Cometary Plasma Tails to Infer Solar Wind Speed
Wang, Yuming; Liu, Rui; Li, Xiaolei +2 more
Detection of the solar wind speed near the Sun is significant in understanding the heating and acceleration of the solar wind. Cometary plasma tails have long been used as natural probes for solar wind speed; previous solar wind speed estimates via plasma tails, however, were based on comet images from a single viewpoint, and the projection effect…
Estimation of distortion on NEEMO system of telescopes
Birlan, M.; Nedelcu, D. A.; Trelia, M. +1 more
The article treats on astrometric measurements obtained using NEEMO system of telescopes and the improvement by applying a distortion model. Astrometric measurements for T05 show a stable value of residuals, independent of distortion model, while the measurements for T03 are improved by a factor three when use a quartic distortion model.
Distribution of Eruptive Centers on Top of Large Shield Volcanoes in the Inner Solar System: General Classification and Glimpses of Their Subvolcanic Structure
Jacobo-Bojórquez, Rocío.; Cañón-Tapia, Edgardo
Processes that occur beneath a planetary surface control the spatial distribution of volcanic features in a volcanic zone. Volcanic vents frequently form clusters and alignments controlled by the lithospheric structure and the stress field. Previous works have determined the influence of stress at different scales in a volcanic area. In this work,…
A global view on the colliding-wind binary WR 147
Zhekov, Svetozar A.; Tomov, Toma V.; Petrov, Blagovest V. +1 more
We present results from a global view on the colliding-wind binary WR 147. We analysed new optical spectra of WR 147 obtained with the Gran Telescopio Canarias and archive spectra from the Hubble Space Telescope by making use of modern atmosphere models accounting for optically thin clumping. We adopted a grid-modelling approach to derive some bas…
Evaluating Stereo DTM Quality at Jezero Crater, Mars with HRSC, Ctx, and Hirise Images
Kirk, R. L.; Gwinner, K.; Fergason, R. L. +5 more
We have used a high-precision, high-resolution digital terrain model (DTM) of the NASA Mars 2020 rover Perseverance landing site in Jezero crater based on mosaicked images from the Mars Reconnaissance Orbiter High Resolution Imaging Science Experiment (MRO HiRISE) camera as a reference dataset to evaluate DTMs based on Mars Express High Resolution…
Poorly Studied Eclipsing Binaries in the Field of DO Draconis: V454 Dra and V455 Dra
Kim, Yonggi; Yoon, Joh-Na; Andronov, Ivan L. +3 more
We report an analysis of two poorly studied eclipsing binary stars, GSC 04396-00605 and GSC 04395-00485 (recently named V455 Dra and V454 Dra, respectively). Photometric data of the two stars were obtained using the 1-m Korean telescope of the LOAO operated by KASI while monitoring the cataclysmic variable DO Dra in the frame of the Inter-Longitud…
Suprathermal Fe in the Earth's Plasma Environment: Cluster RAPID Observations
Dandouras, I.; Daly, P. W.; Haaland, S. +2 more
Baryonic matter in geospace is almost exclusively in a plasma state, with protons (H+) and to some extent ionized helium (He) and oxygen (O) being the dominant ion species. But also other heavier ion species and even molecular ions are present in geospace. The Research with Adaptive Particle Imaging Detectors (RAPID) on board the Cluste…
Transiting exoplanets from the CoRoT space mission. XXIX. The hot Jupiters CoRoT-30 b and CoRoT-31 b
Mazeh, T.; Aigrain, S.; Alonso, R. +31 more
Aims: We report the discovery as well as the orbital and physical characterizations of two new transiting giant exoplanets, CoRoT-30 b and CoRoT-31 b, with the CoRoT space telescope.
Methods: We analyzed two complementary data sets: photometric transit light curves measured by CoRoT, and radial velocity curves measured by the HARPS spect…
Interplanetary Magnetic Flux Rope Observed at Ground Level by HAWC
Alvarez, C.; Kieda, D.; Nieves-Chinchilla, T. +59 more
We report the ground-level detection of a Galactic cosmic-ray (GCR) flux enhancement lasting ∼17 hr and associated with the passage of a magnetic flux rope (MFR) over the Earth. The MFR was associated with a slow coronal mass ejection (CME) caused by the eruption of a filament on 2016 October 9. Due to the quiet conditions during the eruption and …