Tag: Stars
High-mass companions can widen common-envelope outcomes in giant stars
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in AstrophysicsWhat the study found The study found that higher companion mass ratios can produce wider orbits after a common-envelope event, which is an episode where two stars share a single outer envelope. Even so, the widest separation predicted here was still only about 50 solar radii, smaller than the observed range. Why the authors say…
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.
SDSS-V catalogs Milky Way halo stars with new parameter pipeline
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in AstronomySDSS-V all-sky spectroscopic survey produces validated stellar parameter catalog enabling discovery of distant halo substructures and chemically peculiar stars across the Milky Way.
Supermassive stars may match JWST little red dot spectra
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in AstrophysicsSupermassive star models reproduce spectral signatures of JWST little red dots, suggesting these compact sources may be progenitors of the first supermassive black holes.
SLAM estimates stellar parameters for BOSS M dwarfs
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in AstronomyStellar parameters for SDSS-V M dwarfs derived using data-driven support vector regression on BOSS spectra, validated against multiple benchmarks with quantified systematic offsets.
