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 Tools annual

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 Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We report the detection in space of a new molecular species which has beencharacterized spectroscopically and fully identified from astrophysical data.The observations were carried out with the 30m IRAM telescope. The molecule isubiquitous as its $J$=2$\rightarrow$1 transition has been found in coldmolecular clouds, prestellar cores, and shocks. However, it is not found in thehot cores of Orion-KL and in the carbon-rich evolved star IRC+10216. Threerotational transitions in perfect harmonic relation J'=2/3/5 have beenidentified in the prestellar core B1b. The molecule has a 1Sigma electronicground state and its J=2-1 transition presents the hyperfine structurecharacteristic of a molecule containing a nucleus with spin 1. A carefulanalysis of possible carriers shows that the best candidate is NS+. The derivedrotational constant agrees within 0.3-0.7 % with ab initio calculations. NS+was also produced in the laboratory to unambiguously validate the astrophysicalassignment. The observed rotational frequencies and determined molecularconstants confirm the discovery of the nitrogen sulfide cation in space. Thechemistry of NS+ and related nitrogen-bearing species has been analyzed bymeans of a time-dependent gas phase model. The model reproduces well theobserved NS/NS+ abundance ratio, in the range 30-50, and indicates that NS+ isformed by reactions of the neutral atoms N and S with the cations SH+ and NH+,respectively.

Discovery of the ubiquitous cation NS+ in space confirmed by laboratory spectroscopy