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ATLASGAL-selected massive clumps in the inner Galaxy: VI. Kinetic temperature and spatial density measured with formaldehyde
X. D. Tang, C. Henkel, F. Wyrowski +11
We aim to directly determine the kinetic temperature and spatial density with formaldehyde for the 100 brightest ATLASGAL-selected clumps at 870 m representing various evo…
Rotational and high-resolution infrared spectrum of HCN: global ro-vibrational analysis and improved line catalogue for astrophysical observations
Luca Bizzocchi, Filippo Tamassia, Jacob Laas +12
HCN is an ubiquitous molecule in interstellar environments, from external galaxies, to Galactic interstellar clouds, star forming regions, and planetary atmospheres. Observatio…
Mapping Spiral Structure on the far side of the Milky Way
Alberto Sanna, Mark J. Reid, Thomas M. Dame +2
Little is known about the portion of the Milky Way lying beyond the Galactic center at distances of more than 9 kilo-parsec from the Sun. These regions are opaque at optical wavele…
Circumstellar ammonia in oxygen-rich evolved stars
K. T. Wong, K. M. Menten, T. Kamiński +3
The circumstellar ammonia (NH) chemistry in evolved stars is poorly understood. Previous observations and modelling showed that NH abundance in oxygen-rich stars is several…
Testing the variability of the proton-to-electron mass ratio from observations of methanol in the dark cloud core L1498
M. Daprà, C. Henkel, S. A. Levshakov +6
The dependence of the proton-to-electron mass ratio, mu, on the local matter density was investigated using methanol emission in the dense dark cloud core L1498. Towards two differ…
ATLASGAL --- properties of a complete sample of Galactic clumps
J. S. Urquhart, C. Koenig, A. Giannetti +15
Abridged: ATLASGAL is an unbiased 870 micron submillimetre survey of the inner Galactic plane. It provides a large and systematic inventory of all massive, dense clumps in the Gala…