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Molecular Clouds Towards RCW49 and Westerlund 2

Molecular Clouds Towards RCW49 and Westerlund 2. Dame 2007 ApJ, 665, L163 Povich et al. 2008 ApJ, 689, 242 Furukawa et al. arXiv:0904.0286 Fukui et al. arXiv:0903.5340 & references therein. RCW49:[284.3,-0.3], HII complex D~2.3-8 kpc, 90’*70’ & 12’ core Excited by the Westerlund 2 cluster

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Molecular Clouds Towards RCW49 and Westerlund 2

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  1. Molecular Clouds Towards RCW49 and Westerlund 2 Dame 2007 ApJ, 665, L163 Povich et al. 2008 ApJ, 689, 242 Furukawa et al. arXiv:0904.0286 Fukui et al. arXiv:0903.5340 & references therein

  2. RCW49:[284.3,-0.3], HII complex • D~2.3-8 kpc, 90’*70’ & 12’ core • Excited by the Westerlund 2 cluster • Stars + Optical nebulosity + Diffuse emission • A wind-blown shell resulting from W2 cluster 843 MHz by the Molonglo Observatory Synthesis Telescope 43’’ 25’’

  3. Spitzer 3.6, 4.5, & 5.8um tri-color image

  4. 2MASS J, H, & K (1.25,1.65, & 2.17um)

  5. Westerlund 2:[284.27,-0.33], tight open cluster • 1-3 Myr, 5E3 Msun, E~3.6E51 erg • The core of the HII region RCW49 2MASS J,H, &K Intense SFR: numerous Pre Main Sequence objects + many early-type stars

  6. 138 ks 0.1-1 keV 1.-2. keV 2-10 keV

  7. HESS TeV + MOST Radio Triangle= WR star (82+83 Msun, ~3.7d) Dotted blister= wind bubble of WR star

  8. 1E3 cm-3 10-100km/s

  9. Dame 2007: 12CO(1-0), 12’@115GHz 0-20 km/s 11km/s d~6kpc,M~7E4 Msun

  10. Furukawa et al. 2009: 12CO(2-1) 1.5’@230GHz 6 km/s d~5.4 kpc, M~2E5 Msun, E~1E50 erg

  11. Fukui et al. 2009: 12CO(1-0) 3’@115GHz 24-28 km/s crescent arc; 28-30 km/s jet

  12. HI gray + CO contours + VHE contours: hole-like structure

  13. 100 * 10 pc J1:8E3 Msun J2:2E4 Msun J3:3E3 Msun J4:1E3 Msun E~2E48 ergs Anisotropic SNe: Cas A Accretion-powered jet: SS433

  14. Summary • Dust in a complex network coexists with ionized gas and some material has been sculpted by winds and radiation; • The distance to the cluster and HII region is about 5.4-6 kpc; • A spectacular jet and arc of molecular gas toward the extended TeV source are discovered. The arc is probably from the result of a powerful supernova explosion and the jet from a long-lived microquasar jet.

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