We present high resolution observations in the starless dense molecular core L1512 performed with the Medicina 32m radio telescope. The resolved hfs components of HC3N and NH3 show no kinematic sub-structure and consist of an apparently symmetric peak profile without broadened line wings or self-absorption features suggesting that they sample the same material. The velocity dispersion is101(±1)m s-1for NH3 and 85(±2)m s-1 for HC3N. The kinetic temperature of the cloud is estimated at 9.2 (±1.2) K and the turbulence is of 76 m s-1in a subsonic regime. This places L1512 among the most quiescent dark cores and makes it an ideal laboratory to study variations of the electron-to-protonmass ratio, μ= me/mp by means of observations of inversion lines of NH3 combined with rotational lines of other molecular species. © Springer-Verlag Berlin Heidelberg 2011.
CITATION STYLE
Mignano, A., Molaro, P., Levshakov, S., Centurión, M., Maccaferri, G., & Lapinov, A. (2011). Starless cores as fundamental physics labs. In Astrophysics and Space Science Proceedings (pp. 159–165). Kluwer Academic Publishers. https://doi.org/10.1007/978-3-642-19397-2_16
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