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Water deuteration and ortho-to-para nuclear spin ratio of H2 in molecular clouds formed via the accumulation of HI gas
K. Furuya, Y. Aikawa, U. Hincelin +4
We investigate the water deuteration ratio and ortho-to-para nuclear spin ratio of H2 (OPR(H2)) during the formation and early evolution of a molecular cloud, following the scenari…
Detection of extragalactic argonium, ArH, toward PKS~1830211
Holger S. P. Müller, Sébastien Muller, Peter Schilke +6
Argonium has recently been detected as a ubiquitous molecule in our Galaxy. Model calculations indicate that its abundance peaks at molecular fractions in the range of 1E-4 to 1E-3…
Tracing the Ingredients for a Habitable Earth from Interstellar Space through Planet Formation
Edwin A. Bergin, Geoffrey A. Blake, Fred Ciesla +2
We use the C/N ratio as a monitor of the delivery of key ingredients of life to nascent terrestrial worlds. Total elemental C and N contents, and their ratio, are examined for the…
Tentative detection of ethylene glycol toward W51/e2 and G34.3+0.2
Julie M. Lykke, Cécile Favre, Edwin A. Bergin +1
How complex organic - and potentially prebiotic - molecules are formed in regions of low- and high-mass star-formation remains a central question in astrochemistry. In particular,…
The distribution of deuterated formaldehyde within Orion-KL
Cecile Favre, Edwin Bergin, Justin Neill +3
We report the first high angular resolution imaging (3.4\arcsec 3.0\arcsec) of deuterated formaldehyde (HDCO) toward Orion--KL, carried out with the Submillimeter Array (S…
Tracing Embedded Stellar Populations in Clusters and Galaxies using Molecular Emission: Methanol as a Signature of the Low-Mass End of the IMF
L. E. Kristensen, E. A. Bergin
Most low-mass protostars form in clusters, in particular high-mass clusters; however, how low-mass stars form in high-mass clusters and what the mass distribution is, are still ope…