314 citations · 1.3k across the 55 of their papers we have counts for
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Tomography of the Ophiuchus Molecular Cloud with Velocity Features in CH spectra: A Pilot Study of Coherent Sub-structures
Lei qian, Zhichen Pan, Dongyue Jiang +1
The CH transition was used to investigate the possible line of sight sub-structures from the dense and optically thick in CO regions in the Ophiuchus sta…
Where is OH and Does It Trace the Dark Molecular Gas (DMG)?
Di Li, Ningyu Tang, Hiep Nguyen +15
Hydroxyl (OH) is expected to be abundant in diffuse interstellar molecular gas as it forms along with under similar conditions and within a similar extinction range. We have…
Water abundance in four of the brightest water sources in the southern sky
Bing-Ru Wang, Lei Qian, Di Li +1
We estimated the ortho-{\rm{HO}} abundances of G267.9--1.1, G268.4--0.9, G333.1--0.4 and G336.5--1.5, four of the brightest ortho-{\rm{HO}} sources in the southern sky obse…
Large-Scale Spectroscopic Mapping of the Ophiuchi Molecular Cloud Complex I. The CH to NH Ratio as a Signpost of Cloud Characteristics
Zhichen Pan, Di Li, Qiang Chang +3
We present 2.5-square-degree CH N=1-0 and NH J=1-0 maps of the Ophiuchi molecular cloud complex. These are the first large-scale maps of the Ophiuchi molecula…
Physical properties of CO-dark molecular gas traced by C
Ningyu Tang, Di Li, Carl Heiles +3
Neither HI nor CO emission can reveal a significant quantity of so-called dark gas in the interstellar medium (ISM). It is considered that CO-dark molecular gas (DMG), the molecula…
A New Method for Constraining Molecular Cloud Thickness: A study of Taurus, Perseus and Ophiuchus
Lei Qian, Di Li, Stella Offner +1
The core velocity dispersion (CVD) is a potentially useful tool for studying the turbulent velocity field of molecular clouds. CVD is based on centroid velocities of dense gas clum…
Quantifying Dark Gas
Di Li, Duo Xu, Carl Heiles +2
A growing body of evidence has been supporting the existence of so-called "dark molecular gas" (DMG), which is invisible in the most common tracer of molecular gas, i.e., CO rotati…