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Feedback in W49A diagnosed with radio recombination lines and models
M. R. Rugel, D. Rahner, H. Beuther +20
We present images of radio recombination lines (RRLs) at wavelengths around 17 cm from the star-forming region W49A to determine the kinematics of ionized gas in the THOR survey (T…
Do Spectroscopic Dense Gas Fractions Track Molecular Cloud Surface Densities?
Molly J. Gallagher, Adam K. Leroy, Frank Bigiel +22
We use ALMA and IRAM 30-m telescope data to investigate the relationship between the spectroscopically-traced dense gas fraction and the cloud-scale (120 pc) molecular gas surface…
Histogram of oriented gradients: a technique for the study of molecular cloud formation
J. D. Soler, H. Beuther, M. Rugel +22
We introduce the histogram of oriented gradients (HOG), a tool developed for machine vision that we propose as a new metric for the systematic characterization of observations of a…
Radio continuum emission in the northern Galactic plane: Sources and spectral indices from the THOR survey
Y. Wang, S. Bihr, M. Rugel +15
Radio continuum surveys of the Galactic plane can find and characterize HII regions, supernova remnants (SNRs), planetary nebulae (PNe), and extragalactic sources. A number of surv…
A 50 pc scale view of star formation efficiency across NGC 628
K. Kreckel, C. Faesi, J. M. D. Kruijssen +16
Star formation is a multi-scale process that requires tracing cloud formation and stellar feedback within the local (<kpc) and global galaxy environment. We present first results f…
The Star Formation Efficiency per Free Fall Time in Nearby Galaxies
Dyas Utomo, Jiayi Sun, Adam K. Leroy +16
We estimate the star formation efficiency per gravitational free fall time, , from observations of nearby galaxies with resolution matched to the typical size of a Gian…
Dense Molecular Gas in the Nearby Low Metallicity Dwarf Starburst Galaxy IC 10
Amanda A. Kepley, Lauren Bittle, Adam K. Leroy +6
Dense molecular gas and star formation are correlated in galaxies. The effect of low metallicity on this relationship is crucial for interpreting observations of high redshift gala…
Cloud-Scale Molecular Gas Properties in 15 Nearby Galaxies
Jiayi Sun, Adam K. Leroy, Andreas Schruba +16
We measure the velocity dispersion, , and surface density, , of the molecular gas in nearby galaxies from CO spectral line cubes with spatial resolution - pc, matche…
Dense Gas, Dynamical Equilibrium Pressure, and Star Formation in Nearby Star-Forming Galaxies
Molly J. Gallagher, Adam K. Leroy, Frank Bigiel +17
We use new ALMA observations to investigate the connection between dense gas fraction, star formation rate, and local environment across the inner region of four local galaxies sho…
OH absorption in the first quadrant of the Milky Way as seen by THOR
M. R. Rugel, H. Beuther, S. Bihr +20
The hydroxyl radical (OH) is present in the diffuse molecular and partially atomic phases of the interstellar medium (ISM), but its abundance relative to hydrogen is not clear. We…
Full-disc CO(1-0) mapping across nearby galaxies of the EMPIRE survey and the CO-to-H conversion factor
D. Cormier, F. Bigiel, M. J. Jiménez-Donaire +16
Carbon monoxide (CO) provides crucial information about the molecular gas properties of galaxies. While CO has been targeted extensively, isotopologues such as CO hav…