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Molecular anions in protostars, prestellar cores and dark clouds
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Charnley, Steven Buckle, Jane Millar, Tom Wash, Catherine Cordiner, Martin |
| Copyright Year | 2011 |
| Description | From our recent survey work using the Green Bank Telescope, microwave emission lines from the hydrocarbon anion C6H(-) and its parent neutral C6H have been detected in six new sources. Using HC3N = 10(exp -9) emission maps, we targeted the most carbon-chain-rich sources for our anion survey, which included the low-mass Class 0 protostar L1251A-IRS3, the prestellar cores L1389-SMM1 and L1512, and the interstellar clouds Ll172A, TMC-1C and L1495B. Derived [C6H(-)]/[C6H] anion-to-neutral ratios are approximately 1-10. The greatest C6H(-) column densities are found in the quiescent clouds TMC-1C and L1495B, but the anion-to-neutral ratios are greatest in the prestellar cores and protostars. These results are interpreted in terms of the physical and chemical properties of the sources, and the implications for molecular cloud chemistry are discussed. |
| File Size | 22869 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20110013330 |
| Archival Resource Key | ark:/13960/t3rv5jf1w |
| Language | English |
| Publisher Date | 2011-05-30 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Stellar Cores Anions Star Formation Molecular Clouds Emission Spectra Hydrocarbons Stellar Evolution Chemical Properties Cosmochemistry Microwave Emission Interstellar Matter Protostars Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
