# spectral index

> measure of the dependence of radiative flux density on frequency (astronomical term)

**Wikidata**: [Q2280060](https://www.wikidata.org/wiki/Q2280060)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Spectral_index)  
**Source**: https://4ort.xyz/entity/spectral-index


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)