Tag: Astronomy and Astrophysics
Two radio shells likely trace galaxy merger shocks
What the study found The study reports two intersecting radio shells, called ORC J1841–6547 or ORC 6, that are likely radio relics around a compact galaxy group. The authors say these shells may be shock-energised remnants linked to galaxy mergers. Why the authors say this matters The authors conclude that at least some odd radio…
Solar prominences formed self-consistently in 3D simulations
What the study found The study found that solar prominences can form self-consistently in fully three-dimensional simulations when the magnetic field is set with appropriate initial conditions. In the simulations, a prominence began with a random ejection of dense plasma seed material from the chromosphere, the Sun’s lower atmospheric layer, into the corona. Why the…
Non-equilibrium condensation matches chondrite mineral classes
What the study found Chondrite precursors may have formed through kinetic non-equilibrium condensation rather than only equilibrium processes. The model results suggest that different cooling rates and pressures can produce three mineralogical types, with more departure from equilibrium leading to more oxidized and hydrous mineralogies. Why the authors say this matters The authors say this…
Mars clay-bearing rocks yielded more than 20 organic molecules
What the study found The study found more than 20 organic molecules in clay-bearing sandstone from the Knockfarrill Hill member of Glen Torridon in Gale crater on Mars. The authors report that these molecules were detected in situ by the Sample Analysis at Mars (SAM) instrument suite on the Curiosity rover after a tetramethylammonium hydroxide…
Turbulent black hole coronae can produce observed X-ray spectra
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in AstrophysicsSimulations show turbulent black hole coronae generate two-temperature plasmas with extended nonthermal ion distributions while producing observed X-ray spectra.
NUV-blue spirals show star-forming outer disks
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in AstronomyStudy reveals why optically red spiral galaxies show ultraviolet-blue colors: quenched centers with active outer disks sustained by fresh gas accretion or galaxy interactions.
Lorentz violation changes black hole disk images and polarization
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in AstrophysicsObservable signatures of Lorentz violation in Hořava gravity revealed through black hole accretion disk images and polarization patterns, testable with future Event Horizon Telescope observations.
Review compares methods for simulating fuzzy dark matter
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in AstrophysicsReview of numerical simulation methods for fuzzy dark matter, examining wave-based and fluid-based algorithms for resolving ultralight boson dynamics on galactic scales.
VLBI and Gaia agree on many long-period variable star distances
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in AstronomyCompare VLBI and Gaia DR3 astrometric measurements of 43 long period variable stars, revealing complementary strengths for determining stellar distances and proper motions across different.
Black hole merger spins peak near perpendicular
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in AstrophysicsAnalysis of gravitational-wave data reveals that merging black holes predominantly exhibit near-perpendicular spin orientations, suggesting most form in triple-star systems.
