IY Lyr is a thick-disk RRc star with a 1.37 solar-mass companion most likely a neutron star in a 3.94-year eccentric orbit, confirmed by photometry, spectroscopy, and astrometry.
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The chirp-mass distribution of GW-detected binary black holes shows a ladder of peaks doubling in mass, with a new intermediate peak at 19 solar masses confirming a prior prediction from the hierarchical merger model.
The Gaia BH3 companion exhibits an r-I abundance pattern reproduced by core-collapse supernova plus r-process yields and closely matching diluted ED-2 stars, supporting early cluster enrichment over local pollution.
Stellar evolution and atmosphere models predict black hole progenitors are predominantly hot and blue with a direct-collapse rate of ~0.4 per century in a 1 Msun/yr star-forming galaxy.
kima is extended with Gaia astrometry orbit models for Bayesian fitting and model comparison, validated on real and simulated data.
This perspective paper outlines expected advances in studying accretion and jets in compact object binaries using the SKA's improved sensitivity and resolution.
Review of high-precision astrometry applications to compact object astrophysics, emphasizing Gaia DR3 evidence for mass-dependent peculiar velocities and NS-BH similarities.
citing papers explorer
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IY Lyr: A Thick-Disk first-overtone RR Lyrae Star with a Possible Neutron Star Companion
IY Lyr is a thick-disk RRc star with a 1.37 solar-mass companion most likely a neutron star in a 3.94-year eccentric orbit, confirmed by photometry, spectroscopy, and astrometry.
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The chemical fingerprint of the Gaia BH3 system. Evidence for early cluster enrichment from the analysis of 51 elements
The Gaia BH3 companion exhibits an r-I abundance pattern reproduced by core-collapse supernova plus r-process yields and closely matching diluted ED-2 stars, supporting early cluster enrichment over local pollution.
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Hot blue progenitors of stellar-mass black holes
Stellar evolution and atmosphere models predict black hole progenitors are predominantly hot and blue with a direct-collapse rate of ~0.4 per century in a 1 Msun/yr star-forming galaxy.