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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 - PowerPoint PPT Presentation
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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• Stars + Optical nebulosity + Diffuse emission• A wind-blown shell resulting from W2 cluster
843 MHz by the Molonglo Observatory Synthesis Telescope
43’’
25’’
Spitzer 3.6, 4.5, & 5.8um tri-color image
2MASS J, H, & K (1.25,1.65, & 2.17um)
• 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
0.1-1 keV
1.-2. keV
2-10 keV
138 ks
HESS TeV + MOST Radio
Triangle= WR star (82+83 Msun, ~3.7d)
Dotted blister= wind bubble of WR star
1E3 cm-310-100km/s
Dame 2007: 12CO(1-0), 12’@115GHz0-20 km/s 11km/s d~6kpc,M~7E4 Msun
Furukawa et al. 2009: 12CO(2-1) 1.5’@230GHz6 km/s d~5.4 kpc, M~2E5 Msun, E~1E50 erg
Fukui et al. 2009: 12CO(1-0) 3’@115GHz24-28 km/s crescent arc; 28-30 km/s jet
HI gray + CO contours + VHE contours: hole-like structure
J1:8E3 Msun
J2:2E4 Msun
J3:3E3 Msun
J4:1E3 Msun
E~2E48 ergs
Anisotropic SNe: Cas A
Accretion-powered jet: SS433
100 * 10 pc100 * 10 pc
Summary• Dust in a complex network coexists with ioni
zed 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.