Search Publications
The Relative Prevalence of Wave Packets and Coherent Structures in the Inertial and Kinetic Ranges of Turbulence as Seen by Solar Orbiter
Dudok de Wit, Thierry; Bendt, Alina; Chapman, Sandra
The Solar Orbiter (SO) mission provides the opportunity to study the evolution of solar wind turbulence. We use SO observations of nine extended intervals of homogeneous turbulence to determine when turbulent magnetic field fluctuations may be characterized as: (i) wave packets and (ii) coherent structures (CSs). We perform the first systematic sc…
Astrometric Observations of NEA 1998 HH49 Using the Daocheng 50 cm Telescope
Peng, Qing-Yu; Xu, Huan; Cheng, Xiang-Ming +3 more
This study details an astrometric observation campaign of the Near-Earth Asteroid 1998 HH49, conducted with the aim of refining our understanding of its physical characteristics. Utilizing the 50 cm telescope located at the Wumingshan Mountain in Daocheng, Sichuan, images were obtained over four nights, from 2023 October 19 to October 22. These ob…
AT 2021hdr: A candidate tidal disruption of a gas cloud by a binary super massive black hole system
Bauer, F. E.; Chavushyan, V.; Arévalo, P. +25 more
With a growing number of facilities able to monitor the entire sky and produce light curves with a cadence of days, in recent years there has been an increased rate of detection of sources whose variability deviates from standard behavior, revealing a variety of exotic nuclear transients. The aim of the present study is to disentangle the nature o…
JWST Reveals Bulge-dominated Star-forming Galaxies at Cosmic Noon
van Dokkum, Pieter; van der Wel, Arjen; Bezanson, Rachel +10 more
Hubble Space Telescope imaging shows that most star-forming galaxies at cosmic noon—the peak of cosmic star formation history—appear disk-dominated, leaving the origin of the dense cores in their quiescent descendants unclear. With the James Webb Space Telescope's high-resolution imaging to 5 µm, we can now map the rest-frame near-infrared e…
The Correlation Between Dust and Gas Contents in Molecular Clouds
Li, Guang-Xing; Chen, Bing-Qiu; Li, Rui-Zhi +3 more
Molecular clouds are regions of dense gas and dust in space where new stars and planets are born. There is a strong correlation between the distribution of dust and molecular gas in molecular clouds. The present work focuses on the three-dimensional morphological comparisons between dust and gas in 567 molecular clouds identified in a previously p…
Distribution of atmospheric aerosols during the 2007 Mars dust storm (MY 28): Solar infrared occultation observations by SPICAM
Montmessin, F.; Bertaux, J. -L.; Fedorova, A. A. +3 more
Solar occultation measurements by the SPICAM IR on Mars-Express have been used to study aerosol vertical distribution during the 2007 global dust storm (GDS) of Mars Year 28. Measurements in the near-IR spectral range from 1 to 1.7 µm provide information about aerosol optical properties, extinction coefficient, particle size and number densi…
2FHL J1745.1–3035: A Newly Discovered, Powerful Pulsar Wind Nebula Candidate
Vignali, C.; Ajello, M.; Tibaldo, L. +8 more
We present a multi-epoch, multi-observatory X-ray analysis for 2FHL J1745.1–3035, a newly discovered very high-energy Galactic source detected by the Fermi Large Area Telescope (LAT) located in close proximity to the Galactic Center (l = 358.°5319; b = ‑0.°7760). The source shows a very hard γ-ray photon index above 50 GeV, Γ γ = 1.2 ±…
A Precursor to Solar Prominence Eruptions: Detection and Analysis of EUV Prominence Oscillations
Foullon, Claire; Verwichte, Erwin; Beckwith-Chandler, William
The eruption of prominences can have a significant influence on the solar–terrestrial environment. However, accurately predicting these eruptions remains a challenge. We apply automated detection methods for extreme ultraviolet (EUV) prominences observed by the twin spacecraft from the Solar Terrestrial Relations Observatory (STEREO) mission and t…
Energy Dependence of Solar Energetic Protons and Their Origin in Solar Cycles 23 and 24
Miteva, Rositsa; Dechev, Momchil; Samwel, Susan W.
The study presents the compilation of a comprehensive catalog of solar energetic protons (SEPs) in solar cycles (SCs) 23 and 24 (1996–2019) in 10 energy channels from about 20 to 100 MeV based on data from the Energetic and Relativistic Nuclei and Electron (ERNE) instrument aboard Solar and Heliospheric Observatory (SOHO). For comparison, we added…
Targeting Shallow Subsurface Sampling for Mars at Oxia Planum Using Fluvial Erosion–Deposition Modeling
Steinmann, Vilmos; Kereszturi, Ákos
A model-based surface fluvial erosion and deposition approach was adapted to Martian conditions to forecast the potential locations for shallow subsurface sampling by the Rosalind Franklin ExoMars rover at Oxia Planum. While remote and on-site images show only the surface visible features, former fluvial-related accumulation sites might be hidden.…