An X-ray emitting bubble in the CEP OB3 association

Astronomy and Astrophysics – Astronomy

Scientific paper

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Early Stars, Hot Stars, Interstellar Gas, X Ray Astronomy, B Stars, H Ii Regions, Heao 2, High Temperature Gases, Hydrogen Ions, O Stars, Stellar Winds

Scientific paper

The authors report the discovery of a region of extended X-ray emission in the young star association Cep OB3 and its H II region S155. The X-ray luminosity of 2 × 1032 erg s-1 is probably due to a bubble of hot gas formed by the winds of the early-type stars which were not individually detected. This is the first evidence for such a bubble at X-ray wavelengths.

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