Stars throw their weight in old galaxies

TL;DR

This paper discusses how old, massive galaxies contain a higher proportion of low-mass stars, suggesting star formation processes in the early Universe differed from those observed today.

Contribution

It provides evidence that star formation in the early Universe was different, based on the stellar mass distribution in old, massive galaxies.

Findings

Old, massive galaxies have a higher fraction of low-mass stars.

Star formation in the early Universe may have been different.

Supports evolving models of galaxy formation.

Abstract

The observation that old, massive galaxies have a larger fraction of low-mass stars than their younger, lower-mass counterparts adds to mounting evidence that star formation may have been different in the early Universe.