Unusually High HCO+/CO Ratios in and outside Supernova Remnant W49B

  title={Unusually High HCO+/CO Ratios in and outside Supernova Remnant W49B},
  author={Ping Zhou and Gao-Yuan Zhang and Xin Zhou and Maria Arias and B.-C. Koo and Jacco Vink and Zhi-yu Zhang and Lei Sun and F. Du and Hui Zhu and Yang Chen and Stefano Bovino and Yong-Hyun Lee},
  journal={The Astrophysical Journal},
Galactic supernova remnants (SNRs) and their environments provide the nearest laboratories to study SN feedback. We performed molecular observations toward SNR W49B, the most luminous Galactic SNR in the X-ray band, aiming to explore signs of multiple feedback channels of SNRs on nearby molecular clouds (MCs). We found very broad HCO+ lines with widths of dv ∼ 48–75 km s−1 in the SNR southwest, providing strong evidence that W49B is perturbing MCs at a systemic velocity of V LSR = 61–65 km s−1… 



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