# The Secret Lives of Cepheids: δ Cep—The Prototype of a New Class of Pulsating X-Ray Variable Stars<sup>*</sup>

> Research article (The Astrophysical Journal, 2017) · cited 37× · AI/ML

**Wikidata**: [openalex:W2592867994](https://www.wikidata.org/wiki/openalex:W2592867994)  
**Source**: https://4ort.xyz/entity/the-secret-lives-of-cepheids-cepthe-prototype-of-a-new-class-of-pulsating-x-ray-variable-stars-sup-sup