TWiki> Astrogrid Web>DocStore>OntologyDocs>BrownDwarfsforRegistry>BrownDwarfRegistryRequirements>SpectralIndex (2003-03-03, AnitaRichards)EditAttach
Spectral index alpha between continuum observations made in bands around two frequencies e.g. 5 and 1.4 GHz, where flux densities at each frequency are F5 and F1.4 respectively:

alpha=[log(F5/F1.4)]/[log(5/1.4)]

-- AnitaRichards - 03 Mar 2003

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Topic revision: r1 - 2003-03-03 - 14:12:57 - AnitaRichards
 
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