Concept information
Terme préférentiel
Tully-Fisher relation
Définition
- 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)
Concept générique
Synonyme(s)
- Tully-Fisher relationship
Traductions
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français
URI
http://data.loterre.fr/ark:/67375/MDL-RF7SDLLZ-2
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