HD 189733

A detailed X-ray study of the HD 189733 binary system variability

(ORDO NEWS) — Astronomers observed the binary known as HD 189733 using the European Space Agency‘s XMM-Newton satellite. The results of this observational campaign provide valuable information about the unusual X-ray variability of this binary star. Located about 63 light-years from Earth, the HD 189733 system is a wide binary system consisting of two dwarfs of spectral types K1 (HD 189733 A) and M (HD 189733 B). The primary and…