Author ORCID Identifier
Document Type
Article
Publication Date
3-21-2000
Abstract
We explore the Tully-Fisher relation over five decades in stellar mass in galaxies with circular velocities ranging over 30 ≲ Vc ≲ 300 km s-1. We find a clear break in the optical Tully-Fisher relation: field galaxies with Vc ≲ 90 km s-1 fall below the relation defined by brighter galaxies. These faint galaxies, however, are very rich in gas; adding in the gas mass and plotting the baryonic disk mass Md = M* + Mgas in place of luminosity restores the single linear relation. The Tully-Fisher relation thus appears fundamentally to be a relation between rotation velocity and total baryonic mass of the form Md ∝ V4c.
Keywords
dark matter, galaxies: dwarf, galaxies: formation, galaxies: fundamental parameters, galaxies: kinematics and dynamics, galaxies: spiral
Language
English
Publication Title
Astrophysical Journal
Grant
AST 99-01663
Rights
© The American Astronomical Society. All rights reserved. This content is free to access, download, and share. For all other uses, you must obtain permission to reuse content: https://journals.aas.org/article-charges-and-copyright/#AAS_material
Recommended Citation
S. S. McGaugh et al 2000. The Baryonic Tully-Fisher Relation. ApJ 533 L99
Manuscript Version
Final Publisher Version