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Optical Depth Estimates and Effective Critical Densities of Dense Gas Tracers in the Inner Parts of Nearby Galaxy Discs
M. J. Jimenez-Donaire, F. Bigiel, A. K. Leroy +17
High critical density molecular lines like HCN(1-0) or HCO+(1-0) represent our best tool to study currently star-forming, dense molecular gas at extragalactic distances. The optica…
The molecular gas mass of M33
P. Gratier, J. Braine, K. Schuster +15
[Abridged] Do some environments favor efficient conversion of molecular gas into stars? To answer this, we need to be able to estimate the H2 mass. Traditionally, this is done usin…
The first CO+ image: Probing the HI/H2 layer around the ultracompact HII region Mon R2
S. P. Trevino-Morales, A. Fuente, A. Sanchez-Monge +12
The CO+ reactive ion is thought to be a tracer of the boundary between a HII region and the hot molecular gas. In this study, we present the spatial distribution of the CO+ rotatio…
Molecular and atomic gas along and across the main sequence of star-forming galaxies
A. Saintonge, B. Catinella, L. Cortese +10
We use spectra from the ALFALFA, GASS and COLD GASS surveys to quantify variations in the mean atomic and molecular gas mass fractions throughout the SFR-M* plane and along the mai…
A Portrait of Cold Gas in Galaxies at 60pc Resolution and a Simple Method to Test Hypotheses That Link Small-Scale ISM Structure to Galaxy-Scale Processes
Adam K. Leroy, Annie Hughes, Andreas Schruba +14
The cloud-scale density, velocity dispersion, and gravitational boundedness of the interstellar medium (ISM) vary within and among galaxies. In turbulent models, these properties p…
Dust Properties in HII Regions in M33
M. Relano, R. Kennicutt, U. Lisenfeld +11
The conversion of the IR emission into star formation rate can be strongly dependent on the physical properties of the dust, which are affected by the environmental conditions wher…