113 citations · 502 across the 16 of their papers we have counts for
12 papers · 1 filter
The cosmic ray ionization rate from H3+ observations can be overestimated due to neglect of time-dependent chemistry
Ka Wai Ho, Munan Gong, Kedron Silsbee +1
The cosmic ray ionization rate (CRIR) is a key parameter governing the physical, chemical and thermal evolution of the interstellar medium. The primary technique for measuring the…
Metallicity Dependence of Pressure-Regulated Feedback-Modulated Star Formation in the TIGRESS-NCR Simulation Suite
Chang-Goo Kim, Eve C. Ostriker, Jeong-Gyu Kim +8
We present a new simulation suite for the star-forming interstellar medium (ISM) in galactic disks using the TIGRESS-NCR framework. Distinctive aspects of our simulation suite are:…
Implementation of chemistry in the Athena++ code
Munan Gong, Ka-Wai Ho, James M. Stone +6
Chemistry plays a key role in many aspects of astrophysical fluids. Atoms and molecules are agents for heating and cooling, determine the ionization fraction, serve as observationa…
The Physical Drivers and Observational Tracers of CO-to-H2 Conversion Factor Variations in Nearby Barred Galaxy Centers
Yu-Hsuan Teng, Karin M. Sandstrom, Jiayi Sun +24
The CO-to-H conversion factor ($α_\rm{CO}$) is central to measuring the amount and properties of molecular gas. It is known to vary with environmental conditions, and previous…
Introducing TIGRESS-NCR: I. Co-Regulation of the Multiphase Interstellar Medium and Star Formation Rates
Chang-Goo Kim, Jeong-Gyu Kim, Munan Gong +1
Massive, young stars are the main source of energy that maintains multiphase structure and turbulence in the interstellar medium (ISM), and without this "feedback" the star formati…
Photochemistry and Heating/Cooling of the Multiphase Interstellar Medium with UV Radiative Transfer for Magnetohydrodynamic Simulations
Jeong-Gyu Kim, Munan Gong, Chang-Goo Kim +1
We present an efficient heating/cooling method coupled with chemistry and ultraviolet (UV) radiative transfer, which can be applied to numerical simulations of the interstellar med…
Dust grains cannot grow to millimeter sizes in protostellar envelopes
Kedron Silsbee, Vitaly Akimkin, Alexei V. Ivlev +3
A big question in the field of star and planet formation is the time at which substantial dust grain growth occurs. The observed properties of dust emission across different wavele…
The role of neutral hydrogen in setting the abundances of molecular species in the Milky Way's diffuse interstellar medium. II. Comparison between observations and theoretical models
Daniel R. Rybarczyk, Munan Gong, Snezana Stanimirovic +6
We compare observations of HI from the Very Large Array (VLA) and the Arecibo Observatory and observations of HCO from the Atacama Large Millimeter/submillimeter Array (ALMA) a…
The role of neutral hydrogen in setting the abundances of molecular species in the Milky Way's diffuse interstellar medium. I. Observational constraints from ALMA and NOEMA
Daniel R. Rybarczyk, Snezana Stanimirovic, Munan Gong +7
We have complemented existing observations of HI absorption with new observations of HCO, CH, HCN, and HNC absorption from the Atacama Large Millimeter/submillimeter Array…
Thermal damping of Weak Magnetosonic Turbulence in the Interstellar Medium
Kedron Silsbee, Alexei V. Ivlev, Munan Gong
We present a generic mechanism for the thermal damping of compressive waves in the interstellar medium (ISM), occurring due to radiative cooling. We solve for the dispersion relati…
The X_CO conversion factor from galactic multiphase ISM simulations
Munan Gong, Eve C. Ostriker, Chang-Goo Kim
CO(J=1-0) line emission is a widely used observational tracer of molecular gas, rendering essential the X_CO factor, which is applied to convert CO luminosity to H_2 mass. We use n…
A Simple and Accurate Network for Hydrogen and Carbon Chemistry in the ISM
Munan Gong, Eve C. Ostriker, Mark G. Wolfire
Chemistry plays an important role in the interstellar medium (ISM), regulating heating and cooling of the gas, and determining abundances of molecular species that trace gas proper…