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.