A ~2.5 Myr ago passage of HD 7977 within 6000-10000 au can reproduce the observed isotropy in new LPC ω and match returning LPCs, implying doubled current flux and halved Oort cloud population.
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N-body simulations show sub-virial fractal star clusters produce more captured asteroids and rogue objects than virialised Plummer clusters, while neither efficiently forms an Oort Cloud.
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A Potential Signature of HD 7977's Passage Among Observed Long-Period Comet Orbits
A ~2.5 Myr ago passage of HD 7977 within 6000-10000 au can reproduce the observed isotropy in new LPC ω and match returning LPCs, implying doubled current flux and halved Oort cloud population.
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Oort Cloud Ecology -- IV. Exchanging Asteroids
N-body simulations show sub-virial fractal star clusters produce more captured asteroids and rogue objects than virialised Plummer clusters, while neither efficiently forms an Oort Cloud.