English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Context. The c -C 3 H radical was first detected in TMC-1 by Yamamoto et al. (1987, ApJ, 322, L55), who observed the 2 12 $\rightarrow$ 1 11 transition at 91.5 GHz in emission. Mangum & Wootten (1990, A&A, 239, 319) observed the 1 10 $\rightarrow$ 1 11 transition at 14.8 GHz in emission in 12 additional galactic objects. Aims. The aim of this investigation is a quantitative estimate of relative line intensities under NLTE conditions. Methods. For wide ranges of physical parameters, where these molecules may be found, we have solved a set of statistical equilibrium equations coupled with the equations of radiative transfer in an on-the-spot approximation. For c -C 3 H, we accounted for 51 energy levels connected by 207 radiative transitions, and for c -C 3 D, we accounted for 51 energy levels connected by 205 radiative transitions. Results. Our results show that the 3 31 $\rightarrow$ 3 30 transition of c -C 3 H and c -C 3 D may be found in absorption against the cosmic microwave background (CMB). Furthermore, we found population inversion for the 1 10 $\rightarrow$ 1 11 transition. These findings may be useful in identifying these molecules in other cosmic objects, as well as for the determination of physical parameters in these objects.

Anomalous absorption in c-C3H and c-C3D radicals

Anomalous absorption in c-C₃H and c-C₃D radicals