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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4 Pith papers cite this work. Polarity classification is still indexing.
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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.
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.
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Compact Object Astrophysics with Frontline Astrometry
Review of high-precision astrometry applications to compact object astrophysics, emphasizing Gaia DR3 evidence for mass-dependent peculiar velocities and NS-BH similarities.