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Copernicus and Copernicans: Galileo, Kepler, Bruno
Published 2024-09-01Subjects: Get full text
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Statistics of the Interplanetary Magnetic Field from 0.1 to 30 au. I. Distribution Character
Published 2025-01-01“…This study investigates the directional and intensity distributions of the interplanetary magnetic field (IMF) across a heliocentric distance range of approximately 0.1–30 au. …”
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An Overview of Solar Orbiter Observations of Interplanetary Shocks in Solar Cycle 25
Published 2025-01-01“…We use previously unavailable measurements of IP shocks in the inner heliosphere provided by Solar Orbiter, and present a survey of the first 100 shocks observed in situ at different heliocentric distances during the rising phase of solar cycle 25. …”
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The Juno mission as a probe of long-range new physics
Published 2025-01-01“…Abstract Orbits of celestial objects, especially the geocentric and heliocentric ones, have been well explored to constrain new long-range forces beyond the Standard Model (SM), often referred to as fifth forces. …”
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Delay of Near-relativistic Electrons with Respect to Type III Radio Bursts throughout the Inner Heliosphere
Published 2025-01-01“…In this study, we examine energetic electron onsets and type III radio bursts observed by the Integrated Science Investigation of the Sun (IS⊙IS) and the FIELDS Radio Frequency Spectrometer instrument on Parker Solar Probe at a variety of heliocentric distances. With these observations, we can uniquely decouple the effects of acceleration and transport and shed light on the source of these delays. …”
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A Numerical Approach to Study Ablation of Large Bolides: Application to Chelyabinsk
Published 2021-01-01“…The casual dashcam recordings from many locations of the Chelyabinsk superbolide associated with the atmospheric entry of an 18 m in diameter near-Earth object (NEO) have provided an excellent opportunity to reconstruct its atmospheric trajectory, deceleration, and heliocentric orbit. In this study, we focus on the study of the ablation properties of the Chelyabinsk bolide on the basis of its deceleration and fragmentation. …”
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Demise of Kreutz Sungrazing Comet C/2024 S1 (ATLAS)
Published 2025-01-01“…We also use coronagraphic observations from the STEREO-A spacecraft to study C/2024 S1 at heliocentric distances ≲ 0.1 au. We find that the coma scattering cross section peaked near 0.075 au and faded progressively, by a factor ∼20, toward the last observation at 0.02 au. …”
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Production, Transport, and Destruction of Dust in the Kuiper Belt: The Effects of Refractory and Volatile Grain Compositions
Published 2025-01-01“…Models based on early SDC measurements predicted a peak dust number density at a heliocentric distance of ∼40 au, followed by a rapid decline. …”
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Forest Fire Clustering: A Novel Tool for Identifying Star Members of Clusters
Published 2025-01-01“…We use a Gaia DR3 catalog comprising 322 random objects with distinct heliocentric distances from approximately 0 to 5 kpc, along with one ultrafaint dwarf galaxy Bootes I (∼63 kpc), as our validation sample. …”
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Mach Number Scaling of Foreshock Magnetic Fluctuations at Quasi-parallel Bow Shocks and Their Role in Magnetospheric Driving Throughout the Solar System
Published 2025-01-01“…The amplitude of magnetic fluctuations depends on the strength of the shock, quantified by the Alfvén Mach number ( M _A ), which is the ratio of solar wind velocity to the local Alfvén velocity. With increasing heliocentric distance, the solar wind M _A generally increases, such that Mercury typically experiences a lower M _A ∼ 5 compared to Earth ( M _A ∼ 8), and Mars a slightly higher M _A ∼ 9. …”
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Epsilon Canis Majoris: The Brightest Extreme-ultraviolet Source with Surprisingly Low Interstellar Absorption
Published 2025-01-01“…With its 27.3 ± 0.4 km s ^−1 heliocentric radial velocity and small proper motion, ϵ CMa passed within 9.3 ± 0.5 pc of the Sun 4.4 Myr ago, with a 180 times higher photoionization rate.…”
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Discovery and Spectroscopic Confirmation of Aquarius III: A Low-mass Milky Way Satellite Galaxy
Published 2025-01-01“…From medium-resolution Keck/DEIMOS spectroscopy, we identify 11 member stars and measure a mean heliocentric radial velocity of ${v}_{\mathrm{sys}}=-{13.1}_{-0.9}^{+1.0}\ \mathrm{km}\ {{\rm{s}}}^{-1}$ for the system and place an upper limit of σ _v < 3.5 km s ^−1 ( σ _v < 1.6 km s ^−1 ) on its velocity dispersion at the 95% (68%) credible level. …”
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Earth–lunar thermal effect on the temperature stability of TianQin telescope and the suppression methods
Published 2025-03-01“…TianQin is a geocentric space-based gravitational wave detection mission, it will confront a more complex and variable orbital thermal environment compared to heliocentric orbit missions like LISA. As one of the core payloads in TianQin, the telescope requires stringent temperature stability. …”
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