Studying Infall in Infrared Dark Clouds with Multiple HCO+ Transitions

Jinjin Xie, Jingwen Wu, Gary A. Fuller +9

We investigate the infall properties in a sample of 11 infrared dark clouds (IRDCs) showing blue-asymmetry signatures in HCO${}^{+}$ J=1--0 line profiles. We used JCMT to conduct map…