"Novae in Triple Star Systems as a Potential Formation Path of Li-Rich Stars"

Abstract:

The evolution of massive stars is highly sensitive to their birth metallicity, primarily through metallicity-dependent stellar winds that regulate mass loss. Do stellar-mass black holes formed from metal-poor progenitors retain observable signatures of their origin, and are they systematically different from those formed at higher metallicity? The rapidly expanding sample of gravitational-wave detections of black hole mergers offers a powerful way to address this question, provided we can isolate the contribution of low-metallicity progenitors within the observed population.
A straightforward strategy is to target mergers occurring at redshifts where only metal-poor stellar progenitors are expected to form. I will discuss whether this approach is potentially feasible, and in particular whether such a target redshift can be meaningfully defined.