Details

Autor(en) / Beteiligte

• Sano, H
• Sato, J
• Horachi, H
• Moribe, N
• Yamamoto, H
• Hayakawa, T
• Torii, K
• Kawamura, A
• Okuda, T
• Mizuno, N
• Onishi, T
• Maezawa, H
• Inoue, T
• Inutsuka, S
• Tanaka, T
• Matsumoto, H
• Mizuno, A
• Ogawa, H
• Stutzki, J
• Bertoldi, F
• Anderl, S
• Bronfman, L
• Koo, B.-C
• Burton, M. G
• Benz, A. O
• Fukui, Y

Titel

Star-forming Dense Cloud Cores in the TeV Gamma-ray SNR RX J1713.7–3946

Ist Teil von

• The Astrophysical journal, 2010-11, Vol.724 (1), p.59-68

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2010

Link zum Volltext

Quelle

Electronic Journals Library

Beschreibungen/Notizen

• RX J1713.7--3946 is one of the TeV Delta *g-ray supernova remnants (SNRs) emitting synchrotron X-rays. The SNR is associated with molecular gas located at ~1 kpc. We made new molecular observations toward the dense cloud cores, peaks A, C, and D, in the SNR in the 12CO(J = 2-1) and 13CO(J = 2-1) transitions at an angular resolution of 90''. The most intense core in 13CO, peak C, was also mapped in the 12CO(J = 4-3) transition at an angular resolution of 38''. Peak C shows strong signs of active star formation including bipolar outflow and a far-infrared protostellar source, and has a steep gradient with a r --2.2?0.4 variation in the average density within radius r. Peak C and the other dense cloud cores are rim-brightened in synchrotron X-rays, suggesting that the dense cloud cores are embedded within or on the outer boundary of the SNR shell. This confirms the earlier suggestion that the X-rays are physically associated with the molecular gas. We present a scenario where the densest molecular core, peak C, survived the blast wave and is now embedded within the SNR. Numerical simulations of the shock-cloud interaction indicate that a dense clump can indeed survive shock erosion, since the shock propagation speed is stalled in the dense clump. Additionally, the shock-cloud interaction induces turbulence and magnetic field amplification around the dense clump that may facilitate particle acceleration in the lower-density inter-clump space leading to enhanced synchrotron X-rays around dense cores.