English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We place empirical constraints on the yields from zero- and low-metallicitycore collapse supernovae (CCSNe) using abundances measured in very metal-poor(VMP; [Fe/H] $\leq$ $-2$) Damped Lyman Alpha Absorbers (DLAs). For someabundance ratios ([N,Al,S/Fe]), VMP DLAs constrain the metal yields of thefirst SNe more reliably than VMP stars. We compile a large sample of high-S/NVMP DLAs from over 30 years of literature, most with high resolution spectralmeasurements. We infer the IMF-averaged CCSNe yield from the median values fromthe DLA abundance ratios of C, N, O, Al, Si, S, and Fe (over Fe and O). Weassume that the DLAs are metal-poor enough that they represent galaxies intheir earliest stages of evolution, when CCSNe are the only nucleosyntheticsources of the metals we analyze. We compare five sets of zero- andlow-metallicity theoretical yields to the empirical yields derived in thiswork. We find that the five models agree with the DLA yields for ratioscontaining Si and S. Only one model, Heger & Woosley (2010, hereafter HW10),reproduced the DLA values for N, and one other model, Limongi & Chieffi (2018,hereafter LC18), reproduced [N/O]. We found little change in the theoreticalyields with the adoption of a SN explosion landscape (where certain progenitormasses collapse into black holes, contributing no yields) onto HW10, but fixingexplosion energy to progenitor mass results in wide disagreements between thepredictions and DLA abundances. We investigate the adoption of a simple,observationally motivated Initial Distribution of Rotational Velocities forLC18 and find a slight improvement.

Empirical Constraints on Core Collapse Supernova Yields using Very Metal Poor Damped Lyman Alpha Absorbers