18 citations · 47 across the 11 of their papers we have counts for
11 papers · 1 filter
Anomalously high deuterium fractionation in a galactic translucent cloud: a challenge to chemical models
Gan Luo, Zhi-Yu Zhang, Thomas G. Bisbas +8
Deuterated (D-) species have long been proposed to diagnose the physical conditions and chemical evolution of cold dense molecular clouds. While deuterium fractionation has been ex…
Star Formation Drives Production of Low Energy Cosmic Rays
Ningyu Tang, Jiahao Liu, Di Li +18
For over a century, the origin of low-energy cosmic rays (LECRs), the dominant heaters and ionizers of dense interstellar gas, remains elusive owing to solar modulation and uncerta…
CO-dark molecular gas traced by HCO in the diffuse interstellar medium
Daniel R. Rybarczyk, Michael P. Busch, J. R. Dawson +2
A classic problem in the study of the interstellar medium (ISM) is the near-invisibility of molecular hydrogen (H) in cold environments. Observations of CO emission are typical…
The evolution of CH in Planck Galactic Cold Clumps
Gan Luo, Arshia M. Jacob, Marco Padovani +6
Methylidyne (CH) has long been considered a reliable tracer of molecular gas in the low-to-intermediate extinction range. Although extended CH 3.3 GHz emission is commonly observed…
Dense gas properties and star formation in M 82
Fei Li, Zhi-Yu Zhang, Junzhi Wang +1
High-density molecular gas plays a vital role in supporting star formation within galaxies. However, traditional tracers of dense gas, such as the low- transitions of HCN and HC…
Metallicity dependence of the CO-to-H and the [CI]-to-H conversion factors in galaxies
Thomas G. Bisbas, Zhi-Yu Zhang, Maria-Christina Kyrmanidou +6
Understanding the molecular gas content in the interstellar medium (ISM) is crucial for studying star formation and galaxy evolution. The CO-to-H () and the [CI]-to…
The Host Galaxy of FRB 20190520B and Its Unique Ionized Gas Distribution
Xiang-Lei Chen, Chao-Wei Tsai, Daniel Stern +13
The properties of host galaxies associated with Fast Radio Bursts (FRBs) provide critical information for inferring the progenitors and radiation mechanisms of these bursts. We rep…
Inadequate turbulent support in low-metallicity molecular clouds
Lingrui Lin, Zhi-Yu Zhang, Junzhi Wang +16
The dynamic properties of molecular clouds are set by the interplay of their self-gravity, turbulence, external pressure and magnetic fields. Extended surveys of Galactic molecular…
The CO-dark molecular gas in the cold HI arc
Gan Luo, Di Li, Zhi-yu Zhang +6
The CO-dark molecular gas (DMG), which refers to the molecular gas not traced by CO emission, is crucial for the evolution of the interstellar medium (ISM). While the gas propertie…
-enhanced Astrochemistry: the Carbon cycle in extreme galactic conditions
Thomas G. Bisbas, Zhi-Yu Zhang, Eda Gjergo +8
Astrochemistry has been widely developed as a power tool to probe physical properties of the interstellar medium (ISM) in various conditions of the Milky Way (MW) Galaxy, and in ne…
Revealing The CO X-factor In Dark Molecular Gas through Sensitive ALMA Absorption Observations
Gan Luo, Di Li, Ningyu Tang +11
Carbon-bearing molecules, particularly CO, have been widely used as tracers of molecular gas in the interstellar medium (ISM). In this work, we aim to study the properties of molec…