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Chandra ACIS-I data of the molecular cloud and HII region complex NGC 6334were analyzed. The hard X-ray clumps detected with ASCA (Sekimoto et al. 2000)were resolved into 792 point sources. After removing the point sources, anextended X-ray emission component was detected over a 5x9 pc2 region, with the0.5-8 keV absorption-corrected luminosity of 2x10^33 erg/s. The contributionfrom faint point sources to this extended emission was estimated as at most ~20%, suggesting that most of the emission is diffuse in nature. The X-rayspectrum of the diffuse emission was observed to vary from place to place. Intenuous molecular cloud regions with hydrogen column density of 0.5~1x10^22cm-2, the spectrum can be represented by a thermal plasma model withtemperatures of several keV. The spectrum in dense cloud cores exhibits hardercontinuum, together with higher absorption more than ~3x10^22 cm-2. In some ofsuch highly obscured regions, the spectrum show extremely hard continuaequivalent to a photon index of ~1, and favor non-thermal interpretation. Theseresults are discussed in the context of thermal and non-thermal emissions, bothpowered by fast stellar winds from embedded young early-type stars throughshock transitions.

Investigation of Diffuse Hard X‐Ray Emission from the Massive Star‐forming Region NGC 6334