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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We have surveyed molecular line emission from Orion BN/KL from 42.3 to 43.6GHz with the Green Bank Telescope. Sixty-seven lines were identified andascribed to 13 different molecular species. The spectrum at 7 mm is dominatedby SiO, SO2, CH3OCH3, and C2H5CN. Five transitions have been detected from theSiO isotopologues 28SiO, 29SiO, and 30SiO.  We report here for the first time the spectra of the 29SiO and 30SiO v=0J=1-0 emission in Orion BN/KL, and we show that they have double-peakedprofiles with velocity extents similar to the main isotopologue. The mainmotivation for the survey was the search of high-velocity (100-1000 km/s)outflows in the BN/KL region as traced by SiO Doppler components. Some of theunidentified lines in principle could be high-velocity SiO features, butwithout imaging data their location cannot be established.  Wings of emission are present in the v=0 28SiO, 29SiO and 30SiO profiles, andwe suggest that the v=0 emission from the three isotopologues might trace amoderately high-velocity (~30-50 km/s) component of the flows around thehigh-mass protostar Source I in the Orion BN/KL region.  We also confirm the 7 mm detection of a complex oxygen-bearing species,acetone (CH3COCH3), which has been recently observed towards the hot core at 3mm, and we have found further indications of the presence of long cyanopolyynes(HC5N and HC7N) in the quiescent cold gas of the extended ridge.

A 42.3-43.6 GHz spectral survey of Orion BN/KL: First detection of the v=0 J=1-0 line from the isotopologues 29SiO and 30SiO