Author ORCID Identifier
Document Type
Article
Publication Date
10-20-2005
Abstract
I investigate the baryonic Tully-Fisher relation for a sample of galaxies with extended 21 cm rotation curves spanning the range 20 km s-1 ≲ Vf ≤ 300 km s-1. A variety of scalings of the stellar mass-to-light ratio Υ* are considered. For each prescription for Υ*, I give fits of the form Md = AVfx. Presumably, the prescription that comes closest to the correct value will minimize the scatter in the relation. The fit with minimum scatter has A = 50 M⊙ km-4 s4 and x = 4. This relation holds over five decades in mass. Galaxy color, stellar fraction, and Υ* are correlated with each other and with Md, in the sense that more massive galaxies tend to be more evolved. There is a systematic dependence of the degree of maximality of disks on surface brightness. High surface brightness galaxies typically have Υ* ∼ 3/4 of the maximum disk value, while low surface brightness galaxies typically attain ∼1/4 of this amount. © 2005. The American Astronomical Society. All rights reserved.
Keywords
dark matter, galaxies: kinematics and dynamics, galaxies: spiral
Language
English
Publication Title
Astrophysical Journal
Grant
206078
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
Stacy S. McGaugh 2005. The Baryonic Tully-Fisher Relation of Galaxies with Extended Rotation Curves and the Stellar Mass of Rotating Galaxies. ApJ 632 859
Manuscript Version
Final Publisher Version