Concept information
Preferred term
Tully-Fisher relation
Definition
- An observed correlation between the luminosity of a spiral galaxy and its rate of rotation (measured from its 21 cm hydrogen line). This means that more luminous galaxies have stars that are moving faster. Knowing the rotational velocity of a spiral galaxy, this relation provides its absolute magnitude and then its distance. (An Etymological Dictionary of Astronomy and Astrophysics, by M. Heydari-Malayeri, https://dictionary.obspm.fr/index.php?formSearchTextfield=Tully-Fisher+relation&formSubmit=Search&showAll=1)
Broader concept
Entry terms
- Tully-Fisher relationship
In other languages
-
French
URI
http://data.loterre.fr/ark:/67375/MDL-RF7SDLLZ-2
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