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 present observational data of a molecular line survey toward the nearbygalaxies NGC 1068, NGC 253, and IC 342 at the wavelengths of 3 mm($\sim$85--116 GHz) obtained with the Nobeyama 45 m radio telescope. In IC 342the line survey with high spectral resolution at the 3 mm region was reportedfor the first time. NGC 1068 is a nearby gas-rich galaxy with X-rays from anactive galactic nucleus (AGN), and NGC 253 and IC 342 are nearby gas-richgalaxies with prototypical starbursts. These galaxies are useful to study theimpacts of X-rays and ultraviolet radiation on molecular abundances. The surveywas carried out with the resulting rms noise level of a few mK ($T\rm{_A^*}$).As a result we could obtain almost complete data of these galaxies at the 3 mmregion: We detected 19--23 molecular species depending on the galaxiesincluding several new detections (e.g., cyclic-C$_3$H$_2$ in IC 342). We foundthat the intensities of HCN, CN, and HC$_3$N relative to $^{13}$CO aresignificantly strong in NGC 1068 compared to those in NGC 253 and IC 342. Onthe other hand, CH$_3$CCH was not detected in NGC 1068. We obtained theseresults with the narrow beam (15$''$.2--19$''$.1) of the 45 m telescope amongthe single-dish telescopes, and in particular selectively observed themolecular gas close to the circumnuclear disk (CND) in NGC 1068. Our lineintensities in NGC 1068 were compared to those obtained with the IRAM 30 mradio telescope already reported. As a result, the intensity ratio of each linewas found to have information on the spatial distribution. Our observationsobtained the line intensities and stringent constraints on the upper limit forthe three galaxies with such narrow beam, and consequently, the data will be abasis for further observations with high spatial resolution.

A molecular line survey toward the nearby galaxies NGC 1068, NGC 253, and IC 342 at 3 mm with the Nobeyama 45 m radio telescope: The data