Context. The star formation rates in starburst galaxies are orders of magnitude higher than in local star-forming regions, and the origin of this difference is not well understood. Aims. We use sub-mm spectral line maps to characterize the physical conditions of the molecular gas in the luminous Galactic star-forming region W49A and compare them with the conditions in starburst galaxies. Methods. We probe the temperature and density structure of W49A using H2CO and HCN line ratios over a 2' x 2' (6.6 x 6.6 pc) field with an angular resolution of 15 '' (similar to 0.8 pc) provided by the JCMT Spectral Legacy Survey. We analyze the rotation diagrams of lines with multiple transitions with corrections for optical depth and beam dilution, and e...
Context. The earliest stages of high-mass star formation are still poorly characterized. Densities, ...
Context. The density structure of molecular clouds determines how they will evolve. Aims. We...
Context. The HCN, HCO+, and HNC molecules are commonly used as tracers of dense star-forming gas in ...
Context. The star formation rates in starburst galaxies are orders of magnitude higher than in loca...
Context. The star formation rates in starburst galaxies are orders of magnitude higher than in local...
Context. The massive and luminous star-forming region W49A is a well-known Galactic candidate to pro...
Context. The massive and luminous star-forming region W49A is a well-known Galactic candidate to pro...
Context. The HCN, HCO+, and HNC molecules are commonly used as tracers of dense star-forming gas in ...
Context. The HCN, HCO+, and HNC molecules are commonly used as tracers of dense star-forming gas in ...
Aims. We observe the dense gas tracer CS in two nearby starburst galaxies to determine how the condi...
Context. Ionized interstellar gas is an important component of the interstellar medium and its lifec...
International audienceContext. The earliest stages of high-mass star formation are still poorly char...
Context. Sub-millimeter and Far-IR observations have shown the presence of a significant amount of w...
Context. The earliest stages of high-mass star formation are still poorly characterized. Densities, ...
Context. The density structure of molecular clouds determines how they will evolve. Aims. We...
Context. The HCN, HCO+, and HNC molecules are commonly used as tracers of dense star-forming gas in ...
Context. The star formation rates in starburst galaxies are orders of magnitude higher than in loca...
Context. The star formation rates in starburst galaxies are orders of magnitude higher than in local...
Context. The massive and luminous star-forming region W49A is a well-known Galactic candidate to pro...
Context. The massive and luminous star-forming region W49A is a well-known Galactic candidate to pro...
Context. The HCN, HCO+, and HNC molecules are commonly used as tracers of dense star-forming gas in ...
Context. The HCN, HCO+, and HNC molecules are commonly used as tracers of dense star-forming gas in ...
Aims. We observe the dense gas tracer CS in two nearby starburst galaxies to determine how the condi...
Context. Ionized interstellar gas is an important component of the interstellar medium and its lifec...
International audienceContext. The earliest stages of high-mass star formation are still poorly char...
Context. Sub-millimeter and Far-IR observations have shown the presence of a significant amount of w...
Context. The earliest stages of high-mass star formation are still poorly characterized. Densities, ...
Context. The density structure of molecular clouds determines how they will evolve. Aims. We...
Context. The HCN, HCO+, and HNC molecules are commonly used as tracers of dense star-forming gas in ...