A Gaia DR3-based census of 105,971 OB stars within 2 kpc maps local Galactic structure and identifies over 4,200 core-collapse supernova or black hole progenitor candidates.
New Estimates of the Solar-Neighborhood Massive-Stars Birthrate and the Galactic Supernova Rate
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abstract
The birthrate of stars of masses > 10 solar masses is estimated from a sample of just over 400 O3-B2 dwarfs within 1.5 kpc of the Sun and the result extrapolated to estimate the galactic supernova rate contributed by such stars. The solar-neighborhood galactic-plane massive star birthrate is estimated at 176 stars per cubic kpc per million years. Based on a model where the galactic stellar density distribution comprises a disk plus central hole like that of the dust infrared emission (Drimmel & Spergel 2001 ApJ 556, 181) the galactic supernova rate is estimated as probably not less than 1 nor more than 2 per century and the number of O3-B2 dwarfs within the solar circle as ~ 200,000.
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Unveiling the Milky Way with a Gaia DR3 census of OB-type stars within 2 kpc. I. Tracing local Galactic structure, massive star-forming regions and core-collapse supernova progenitors
A Gaia DR3-based census of 105,971 OB stars within 2 kpc maps local Galactic structure and identifies over 4,200 core-collapse supernova or black hole progenitor candidates.