Search Publications
Targeting and image acquisition of Martian surface features with TGO/CaSSIS
Cremonese, G.; Thomas, N.; Pommerol, A. +12 more
CaSSIS is a high-resolution visual telescope onboard the ExoMars Trace Gas Orbiter. The mission started the primary science phase in April 2018. The relatively small single image footprint (typically 40 km × 9.5 km) when compared to the total surface area of Mars demands that images should be targeted and target selection is key for the science re…
The kinematics of the magnetized protostellar core IRAS15398-3359
Caselli, Paola; Redaelli, Elena; Tabatabaei, Farideh S. +1 more
Context. Observations of protostellar envelopes are essential in order to understand better the process of gravitational collapse toward star and planet formation. From a theoretical perspective, magnetic fields are considered an important factor during the early stages of star formation, especially during the main accretion phase.
Aims: Our …
Red Giants Search Method Based on Convolutional Neural Networks
Wu, Tianmin; Yi, Zhenping; Kong, Xiaoming +5 more
Red giants play a crucial role in astronomical exploration. However, the current search for these stars heavily relies on spectrum analysis, making it a cumbersome process. In this paper, we propose a novel red giant search approach called CBAMResNets. CBAMResNets enhances feature extraction from images by incorporating the Convolutional Block Att…
TESS Discovery of Twin Planets near 2:1 Resonance around Early M Dwarf TOI 4342
Vanderburg, Andrew; Lester, Kathryn V.; Latham, David W. +28 more
With data from the Transiting Exoplanet Survey Satellite (TESS), we showcase improvements to the MIT Quick Look Pipeline (QLP) through the discovery and validation of a multiplanet system around M dwarf TOI 4342 (T mag = 11.032, M ⋆ = 0.63 M ⊙, R ⋆ = 0.60 R ⊙, T eff = 3900 K, d = 61…
Estimating Coronal Mass Ejection Mass and Kinetic Energy by Fusion of Multiple Deep-learning Models
Wang, Haimin; Yurchyshyn, Vasyl; Li, Jialiang +5 more
Coronal mass ejections (CMEs) are massive solar eruptions, which have a significant impact on Earth. In this paper, we propose a new method, called DeepCME, to estimate two properties of CMEs, namely, CME mass and kinetic energy. Being able to estimate these properties helps better understand CME dynamics. Our study is based on the CME catalog mai…
Climatological Gravity Waves in the Middle and Upper Atmosphere of Mars Based on ACS/TGO Observations
Zhang, Yun; Zhang, Jie; Ji, Qianqian +2 more
Gravity waves (GWs) are important for the vertical coupling of the Martian atmosphere. The middle atmosphere is the key region where GWs propagate to the upper thermosphere and generate momentum and energy exchange, but the knowledge of middle-atmosphere GWs is incomplete, due to the lack of observations with the kilometer-scale resolution. We hav…
Indirect Observations of Electric Fields at Comet 67P
Gunell, H.; Nilsson, H.; Goetz, C. +2 more
No spacecraft visiting a comet has been equipped with instruments to directly measure the static electric field. However, the electric field can occasionally be estimated indirectly by observing its effects on the ion velocity distribution. We present such observations made by the Rosetta spacecraft on 19 April 2016, 35 km from the nucleus. At thi…
Solar Energetic Particle Events Detected in the Housekeeping Data of the European Space Agency's Spacecraft Flotilla in the Solar System
Wimmer-Schweingruber, Robert F.; Wood, Simon; Wilson, Colin +37 more
Despite the growing importance of planetary Space Weather forecasting and radiation protection for science and robotic exploration and the need for accurate Space Weather monitoring and predictions, only a limited number of spacecraft have dedicated instrumentation for this purpose. However, every spacecraft (planetary or astronomical) has hundred…
The Radiation Environments of Middle-aged F-type Stars
France, K.; Hinton, P. C.; Fleming, B. +5 more
Far-ultraviolet (FUV) emission lines from dwarf stars are important driving sources of photochemistry in planetary atmospheres. Properly interpreting spectral features of planetary atmospheres critically depends on the emission of its host star. While the spectral energy distributions (SEDs) of K- and M-type stars have been extensively characteriz…
Accretion Disk Wind of Hercules X-1 during the Short High State
Fabian, A. C.; Pinto, C.; Kara, E. +5 more
Hercules X-1 is a nearly edge-on X-ray binary with a warped, precessing accretion disk, which manifests through a 35-day cycle of alternating High and Low flux states. This disk precession introduces a changing line of sight toward the X-ray source, through an ionized accretion disk wind. The sightline variation allows us to uniquely determine how…