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

Using the APEX sub-millimeter telescope we have investigated the 12CO(3-2)emission in five face-on nearby barred spiral galaxies, where three of them arehigh surface brightness galaxies (HSBs) lying at the Freeman limit, and two arelow surface brightness galaxies (LSBs). We have positive detections for two ofthree HSB spirals and non-detections for the LSBs. For the galaxies withpositive detection (NGC0521 and PGC070519), the emission is confined to theirbulges, with velocity dispersions of ~90 and ~73 km/s and integratedintensities of 1.20 and 0.76 K/km/s, respectively. For the non-detections, theestimated upper limit for the integrated intensity is ~0.54 K/km/s. With thesefigures we estimate the H2 masses as well as the atomic-to-molecular massratios. Although all the galaxies are barred, we observe 12CO(3-2) emissiononly for galaxies with prominent bars. We speculate that bars could dynamicallyfavor the 12CO(3-2) emission, as a second parameter after surface brightness.Therefore, secular evolution could play a major role in boosting collisionaltransitions of molecular gas, such as 12CO(3-2), especially in LSBs.

12CO(3-2) Emission in Spiral Galaxies: Warm Molecular Gas in Action?