Variations in α-element Ratios Trace the Chemical Evolution of the Disk

• Published in: The Astrophysical journal Vol. 883; no. 1; p. 34
• Main Authors: Blancato, Kirsten, Ness, Melissa, Johnston, Kathryn V., Rybizki, Jan, Bedell, Megan
• Format: Journal Article
• Language: English
• Published: Philadelphia IOP Publishing 20.09.2019
• Subjects: Abundance; Astrometry; Astrophysics; Chemical evolution; Galactic evolution; Galaxies; Iron; Magnesium; Milky Way; Organic chemistry; Silicon; Stellar age; Stellar evolution

It is well established that the chemical structure of the Milky Way exhibits a bimodality with respect to the α -enhancement of stars at a given [Fe/H]. This has been studied largely based on a bulk α abundance, computed as a summary of several individual α -elements. Inspired by the expected subtle...