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 present emission maps (1.5'$\times$1.5' scale, corresponding to 0.18 pc)of the DCN ($J=2-1$) and DCO$^+$ ($J=2-1$) lines in the 2 mm band toward theOrion KL region obtained with the 2 mm receiver system named B4R installed onthe Large Millimeter Telescope (LMT). The DCN emission shows a peak at theOrion KL hot core position, whereas no DCO$^+$ emission has been detectedthere. The DCO$^+$ emission shows enhancement at the west side of the hot core,which is well shielded from the UV radiation from OB massive stars in theTrapezium cluster. We have derived the abundance ratio of DCN/DCO$^+$ at threerepresentative positions where both species have been detected. The gascomponents with $V_{\rm {LSR}} \approx 7.5-8.7$ km/s are associated with lowabundance ratios of $\sim4-6$, whereas much higher abundance ratios($\sim22-30$) are derived for the gas components with $V_{\rm {LSR}} \approx9.2-11.6$ km/s. We have compared the observed abundance ratio to our chemicalmodels and found that the observed differences in the DCN/DCO$^+$ abundanceratios are explained by different densities.

Large-Scale Mapping Observations of DCN and DCO$^+$ toward Orion KL