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 investigate the formation history of the stellar disk component in theMilky Way (MW) based on our new chemical evolution model. Our model considersseveral fundamental baryonic processes, including gas infall, re-accretion ofoutflowing gas, and radial migration of disk stars. Each of these baryonicprocesses in the disk evolution is characterized by model parameters, which aredetermined by fitting to various observational data of the stellar disk in theMW, including the radial dependence of the metallicity distribution function(MDF) of the disk stars, which has recently been derived in the APOGEE survey.We succeeded to obtain the best set of model parameters, which well reproducesthe observed radial dependences of the mean, standard deviation, skewness, andkurtosis of the MDFs for the disk stars. We analyze the basic properties of ourmodel results in detail to get new insights into the important baryonicprocesses in the formation history of the MW. One of the remarkable findings isthat outflowing gas, containing much heavy elements, preferentially re-accretesonto the outer disk parts, and this recycling process of metal-enriched gas isa key ingredient to reproduce the observed narrower MDFs at larger radii.Moreover, important implications for the radial dependence of gas infall andthe influence of radial migration on the MDFs are also inferred from our modelcalculation. Thus, the MDF of disk stars is a useful clue for studying theformation history of the MW.

Metallicity Distribution of Disk Stars and the Formation History of the Milky Way