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Chandra X-ray imaging spectroscopy of the starburst galaxy Henize 2-10reveals a strong nuclear point source and at least two fainter compact sourcesembedded within a more luminous diffuse thermal component. Spectral fits to thenuclear X-ray source imply an unabsorbed X-ray luminosity L_x >10^40 erg/s forreasonable power law or blackbody models, consistent with accretion onto a >50solar mass black hole behind a foreground absorbing column of N_H>10^23 /cm^2.Two of these point sources have L_x=2-5 x 10^38 erg/s, comparable to luminousX-ray binaries. These compact sources constitute a small fraction (<16%) of thetotal X-ray flux from He~2-10 in the 0.3--6.0 keV band and just 31% of theX-rays in the hard 1.1--6.0 keV band which is dominated by diffuse emission.Two-temperature solar-composition plasmas (kT~0.2 keV and kT~0.7 keV) fit thediffuse X-ray component as well as single-temperature plasmas with enhancedalpha/Fe ratios. Since the observed radial gradient of the X-ray surfacebrightness closely follows that of the Halpha emission, the composition of theX-ray plasma likely reflects mixing of the ambient cool/warm ISM with an evenhotter, low emission measure plasma, thereby explaining the ~solar ISMcomposition. Aperture synthesis 21-cm maps show an extended neutral medium toradii of 60" so that the warm and hot phases of the ISM, which extend to ~30",are enveloped within the 8x10^20 /cm^2 contour of the cool neutral medium. Thisextended neutral halo may serve to inhibit a starburst-driven outflow unless itis predominantly along the line of sight. The high areal density of starformation can also be reconciled with the lack of prominent outflow signaturesif Henize 2-10 is in the very early stages of developing a galactic wind.

The Diffuse and Compact X-ray Components of the Starburst Galaxy Henize~2-10