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Tully-Fisher relation

(TFR)
(relation between spiral galaxy luminosity and line width)

The Tully-Fisher relation (TFR) is a relation between the luminosity of a spiral galaxy and the width of its emission lines. The luminosity is related to the galaxy's stellar mass and the line broadening is a measure of its rotation velocity, ascribed to varying Doppler shifts. An estimated luminosity might be calculated and/or the relationship can be calibrated using such galaxies of known distance, making such galaxies standard candles, whose distance can be estimated.

The baryonic Tully-Fisher relation (BTFR) is a variant, specifically using K band measurements, which more closely relate to the stellar mass. The baryonic mass is related to the velocity to the power of 3.5 to 4.


(relation,galaxies,luminosity,rotation,lines,spiral)
Further reading:
https://en.wikipedia.org/wiki/Tully-Fisher_relation
https://ui.adsabs.harvard.edu/abs/1975BAAS....7..426T/abstract
https://ui.adsabs.harvard.edu/abs/2000ApJ...533L..99M/abstract
http://spiff.rit.edu/classes/phys443/lectures/tffj/tffj.html
http://burro.case.edu/Academics/Astr222/Galaxies/Spiral/spiralkin.html
http://icc.dur.ac.uk/~tt/Lectures/Galaxies/TeX/lec/node82.html

Referenced by pages:
cosmic distance ladder
Faber-Jackson relation (FJR)
standard candle

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