Editing Tully–Fisher relation (section)

{{Short description|Trend in astronomy}}
[[Image:OffsetTF.png|thumb|right|280px|The Tully–Fisher relation for spiral and [[lenticular galaxy|lenticular]] galaxies]]

In [[astronomy]], the '''Tully–Fisher relation''' ('''TFR''') is a widely verified [[empirical relationship]] between the mass or intrinsic [[luminosity]] of a [[spiral galaxy]] and its [[galaxy rotation curve|asymptotic rotation velocity]] or [[emission line]] width. Since the observed brightness of a galaxy is distance-dependent, the relationship can be used to estimate distances to galaxies from measurements of their rotational velocity.<ref name=SaidTF>{{Cite book |last=Said |first=Khaled |title=Hubble Constant Tension |date=2023-10-24 |editor-last=Di Valentino |editor-first=E |chapter=Tully–Fisher relation |arxiv=2310.16053 |editor-last2=Brout |editor-first2=D. }}</ref>