Author ORCID Identifier
Document Type
Article
Publication Date
3-9-2022
Abstract
We present stellar population models to calculate the mass-to-light ratio (Γ∗) based on galaxies' colors ranging from GALEX far-UV to Spitzer IRAC1 at 3.6 μm. We present a new composite bulge+disk Γ∗ model that considers the varying contribution from bulges and disks based on their optical and near-IR colors. Using these colors, we build plausible star formation histories and chemical enrichment scenarios based on the star formation rate-stellar mass and mass-metallicity correlations for star-forming galaxies. The most accurate prescription is to use the actual colors for the bulge and disk components to constrain Γ∗; however, a reasonable bulge+disk model plus total color only introduces 5% more uncertainty. Full bulge+disk Γ∗ prescriptions applied to the baryonic Tully-Fisher relation improve the linearity of the correlation, increase the slope, and reduce the total scatter by 4%.
Publication Title
Astronomical Journal
Grant
AST 0908370
Rights
© 2022. The Author(s). Published by the American Astronomical Society. This is an Open Access work distributed under the terms of the Creative Commons Attribution Licence (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
James Schombert et al. Stellar Mass-to-light Ratios: Composite Bulge+Disk Models and the Baryonic Tully-Fisher Relation. 2022 AJ 163 154
Manuscript Version
Final Publisher Version