Skip to main content

Research Repository

Advanced Search

Chemical evolution of the galactic disk with radial gas flows

Lacey, C.G.; Fall, S.M.

Chemical evolution of the galactic disk with radial gas flows Thumbnail


Authors

S.M. Fall



Abstract

Models are presented for the chemical evolution of the galactic disc with radial inflows of the gas at a velocity constant with time, but that may vary with the galactocentric radius. The models include the infall of metal-free gas from outside the disc at a rate decaying exponentially with time, a star formation rate that varies as the surface density of the gas layer to the power of m, with m = 1 or 2, and in some cases an outer edge to the stellar disc at the star formation cutoff radius. The models are compared with the observed age-metallicity relation and metallicity distribution for stars in the solar neighborhood and with the observed radial variations of the metallicity, the star formation rate, and the surface densities of the gas and stars. Inflow velocities of approximately -(0.5-1.0) km/s are expected.

Citation

Lacey, C., & Fall, S. (1985). Chemical evolution of the galactic disk with radial gas flows. Astrophysical Journal, 290, 154-170. https://doi.org/10.1086/162970

Journal Article Type Article
Publication Date Mar 1, 1985
Deposit Date Mar 27, 2015
Publicly Available Date Mar 29, 2024
Journal Astrophysical Journal
Print ISSN 0004-637X
Electronic ISSN 1538-4357
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 290
Pages 154-170
DOI https://doi.org/10.1086/162970
Related Public URLs http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1985ApJ...290..154L&db_key=AST

Files

Published Journal Article (475 Kb)
PDF

Copyright Statement
© 1985. The American Astronomical Society. All rights reserved . Printed in U.S.A.





You might also like



Downloadable Citations