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The structure of voids |
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| Authors: | Stefan Gottlöber Ewa L &#;okas Anatoly Klypin Yehuda Hoffman |
| Institution: | School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT |
| Abstract: | Presented here are high spatial and spectral resolution Chandra X-ray observations of the famous interacting galaxy pair, the Mice, a system similar to, though less evolved than, the well-known Antennae galaxies. Previously unpublished ROSAT High Resolution Imager data of the system are also presented. Starburst-driven galactic winds outflowing along the minor axis of both galaxies (but particularly the northern one) are observed, and spectral and spatial properties, and energetics are presented. That such a phenomenon can occur in such a rapidly evolving and turbulent system is surprising, and this is the first time that the very beginning – the onset, of starburst-driven hot gaseous outflow in a full-blown disc–disc merger has been seen. Point-source emission is seen at the galaxy nuclei, and within the interaction-induced tidal tails. Further point-source emission is associated with the galactic bar in the southern system. A comparison of the source X-ray luminosity function and of the diffuse emission properties is made with the Antennae and other galaxies, and evidence of a more rapid evolution of the source population than the diffuse component is found. No evidence for variability is found between the Chandra and previous observations. |
| Keywords: | ISM: jets and outflows galaxies: individual: NGC 4676 galaxies: haloes galaxies: ISM galaxies: starburst X-rays: galaxies |