Synthetic observables from tECSN models show slower early red-color decline due to higher Ti/Cr and a late-time 12.8 μm Ne II line that strengthens over time, unlike comparable CO deflagration models.
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Disrupted dense star clusters release ~300,000 white dwarf, 150,000 black hole, and 1,000 neutron star binaries into the Milky Way, but Gaia DR3/DR4 detect only a handful of white dwarf systems with none for the others.
Using a joint effective-spin and precession-spin model on 155 gravitational-wave events, the authors infer that the hierarchical (second-generation) merger fraction rises sharply above ~46 M_sun and peaks again near 15.7 M_sun.
Pulsars that received weak natal kicks tend to have weaker magnetic fields, and no fast-kicked pulsar with a field below ~10^11 G appears in the sample.
Natal kicks from supernovae are proposed to disrupt Gaia progenitor binaries containing low-mass black holes more frequently than those leading to gravitational-wave mergers, accounting for the observed difference in the 2.5-5 solar mass gap.
citing papers explorer
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Observational signatures of thermonuclear electron-capture supernovae -- Ne II line strengthening and color evolution as traces of the explosion mechanism
Synthetic observables from tECSN models show slower early red-color decline due to higher Ti/Cr and a late-time 12.8 μm Ne II line that strengthens over time, unlike comparable CO deflagration models.
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The Contribution of Disrupted Dense Star Clusters to Gaia's Compact Object Binaries
Disrupted dense star clusters release ~300,000 white dwarf, 150,000 black hole, and 1,000 neutron star binaries into the Milky Way, but Gaia DR3/DR4 detect only a handful of white dwarf systems with none for the others.
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Signatures of a subpopulation of hierarchical mergers in the GWTC-4 gravitational-wave dataset
Using a joint effective-spin and precession-spin model on 155 gravitational-wave events, the authors infer that the hierarchical (second-generation) merger fraction rises sharply above ~46 M_sun and peaks again near 15.7 M_sun.
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Dependences of radio pulsar parameters on the bimodal kick mode
Pulsars that received weak natal kicks tend to have weaker magnetic fields, and no fast-kicked pulsar with a field below ~10^11 G appears in the sample.
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Where are Gaia's small black holes?
Natal kicks from supernovae are proposed to disrupt Gaia progenitor binaries containing low-mass black holes more frequently than those leading to gravitational-wave mergers, accounting for the observed difference in the 2.5-5 solar mass gap.