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Frontiers in Astronomy and Space Sciences
Scopus
ISSN 2296-987X · Frontiers Media S.A. · 2.001 artikel di indeks
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Artikel Jurnal
Explore space weather and the heliophysics big year through the Community Coordinated Modeling Center’s (CCMC) hands-on tools and collaborations
The Community Coordinated Modeling Center (CCMC) at NASA Goddard Space Flight Center has developed comprehensive resources and initiatives to support the Heliophysics Big Year (HBY) during the approach to solar maximum. This paper details the CCMC’s extensive outreach efforts from October 2023…
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SunSketcher: a Citizen Science network project for the heliophysics big year
SunSketcher is an innovative program of eclipse observations that utilizes a network of smartphones along the path of totality to identify and geolocate the precise contact times via their definitive signature–Baily’s Beads–and hence place meaningful constraints on the shape of the solar disk, in…
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Prebiotic chemistry and origin of living beings: current state, scientific perspectives and (bio)ethical issues
Throughout the 20th and 21st centuries, studies into prebiotic chemistry have made a decisive contribution to research into the origins of life. This is the theme of this article, conceived as an integrative bibliographic review, carried out by consulting descriptors in DeCS…
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A statistical study of poleward boundary intensifications (PBIs) associated with the arrival of polar cap patches
Poleward Boundary Intensifications (PBIs) are transient auroral brightenings at the poleward edge of the auroral oval that serve as optical tracers of nightside plasma transport and energy deposition. However, their statistical properties and coupling with solar wind and geomagnetic activity remain…
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Planetary analog sites in the Indian subcontinent and the Indian Ocean: underexplored environments suited for astrobiological and space research
Astrobiology seeks to understand the origin, evolution, distribution, and future of life in the Universe, focusing on habitability beyond Earth. Due to the high cost and complexity of space missions, studying planetary analog sites on Earth is essential for supporting and de-risking future…
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Fabry-Perot interferometer observations of sustained strong vertical wind activity in the auroral thermosphere
The vertical component of the neutral wind velocity is critical for understanding the thermospheric dynamics at high latitudes. The neutral vertical wind circulation, driven by auroral activity, redistributes heat and momentum within the lower and upper thermosphere between 100 and 500 km. This…
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A gas-phase “top-down” chemical link between aldehydes and alcohols
IntroductionAlcohols and aldehydes represent two key classes of interstellar complex organic molecules (COMs). This work seeks to better understand their possible chemical connections, with a focus on such molecules in the sources of the star-forming region Sgr B2 (N).MethodsThe gas-phase reaction…
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LEO-CalSat for the calibration of W-band ground-based CMB polarization experiments
IntroductionThe current generation of ground- and space-based Cosmic Microwave Background (CMB) telescopes demands highly precise calibration procedures. However, commonly used celestial polarized sources, such as Tau-A, are not characterized with the level of accuracy required for these…
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A software defined aerospace payload testing platform based on AXI bus
This paper presents a software-defined hardware-in-the-loop (HIL) testing platform for aerospace payloads based on a single-chip FPGA, addressing key challenges in ground testing of complex aerospace payloads, including stringent real-time requirements, difficulty in multi-protocol interface…
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Detecting changes in along-path HF propagation during the April 2024 total solar eclipse with radio amateurs and low-cost instrumentation
The total solar eclipse of April 8, 2024 presented a uniquely favorable circumstance for radio science. The Moon’s shadow passed near Canadian time standard station CHU, which transmits in the high frequency (HF, i.e., 3–30 MHz) band. It was therefore possible to observe signal changes due to…
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Influence of atmospheric vertical wind and turbulence on noctilucent clouds
Noctilucent clouds (NLCs), also called Polar Mesospheric Clouds (PMC), are high-altitude ice clouds in the summer mesopause region, mainly at polar latitudes. Their formation is sensitive to local atmospheric conditions, such as water vapor and temperature, as well as dynamics. This study…
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Gypsum as a repository of extinct and extant biosignatures at Salar de Pajonales, northern Chile
Terraces near Flamencos Lagoon in the southeastern Salar de Pajonales (Chile), located at 3,517 m above sea level in the arid Altiplano, host relic gypsum stromatolites and crusts formed under extreme desiccation, intense solar radiation, and episodic hydration. These gypsum-rich environments…
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Studying the detectability of gravitational waves from the post-merger phase in binary neutron star signals
We study the detectability of next-generation gravitational wave detectors by analyzing 10 post-merger signals in binary neutron star simulations assuming they are sources located at d=88 Mpc and d=159 Mpc. The simulation characteristics are based on the binary parameters estimated for the GW190425…
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Application of a modified commercial laser mass spectrometer as a science analog of the Mars Organic Molecule Analyzer (MOMA)
The ESA/NASA Rosalind Franklin rover, planned for launch in 2028, will carry the first laser desorption ionization mass spectrometer (LDI-MS) to Mars as part of the Mars Organic Molecule Analyzer (MOMA) instrument. MOMA will contribute to the astrobiology goals of the mission through the analysis…
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The prevalence and significance of wave cross-scale coupling in the Earth’s magnetosphere: observations from the Van Allen Probes
We present a novel technique for detecting cross-scale coupling of plasma waves in Earth’s radiation belts through the use of the Van Allen Probes (RBSP) filterbank data products. We find that intermediate frequency (18.5 Hz–4.85 kHz) waves modulated at low frequencies (0.7–3.0 Hz) are more common…
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East Meridiani Planum’s karst geomorphology and biosignature preservation potential: a multi-criteria landing site analysis
IntroductionFuture Mars astrobiology missions require landing sites that balance scientific potential for biosignature detection with engineering safety. This study addresses the need for systematic identification of optimal sites targeting ancient aqueous environments distinct from previously…
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Dust traps and gas kinematic signatures in a crescent structure of a planet-forming disk
In the past few years, ALMA unveiled a variety of substructures (rings, spirals, crescents) in the continuum emission of most protoplanetary disks imaged at high spatial resolution. While the majority of disks presents axisymmetric ring-like structures in the dust brightness distribution, some…
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Characterizing ionospheric variability through HF Doppler measurements: a statistical and numerical ray tracing analysis
High-frequency (HF) skywave propagation relies on the ionosphere, making it susceptible to ionospheric variability. This study analyzes long-term Doppler residual measurements of a 10 MHz HF link between Fort Collins, CO, and Newark, NJ, to characterize the impact of ionospheric conditions on the…
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