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

Interacting galaxies are known to have higher global rates of star formationon average than normal galaxies, relative to their stellar masses. Using UV andIR photometry combined with new and published H-alpha images, we have comparedthe star formation rates of ~700 star forming complexes in 46 nearbyinteracting galaxy pairs with those of regions in 39 normal spiral galaxies.The interacting galaxies have proportionally more regions with high starformation rates than the spirals. The most extreme regions in the interactingsystems lie at the intersections of spiral/tidal structures, where gas isexpected to pile up and trigger star formation. Published Hubble Telescopeimages show unusually large and luminous star clusters in the highestluminosity regions. The star formation rates of the clumps correlate withmeasures of the dust attenuation, consistent with the idea that regions withmore interstellar gas have more star formation. For the clumps with the higheststar formation rates, the apparent dust attenuation is consistent with theCalzetti starburst dust attenuation law. This suggests that the high luminosityregions are dominated by a central group of young stars surrounded by a shellof clumpy interstellar gas. In contrast, the lower luminosity clumps are brightin the UV relative to H-alpha, suggesting either a high differentialattenuation between the ionized gas and the stars, or a post-starburstpopulation bright in the UV but faded in H-alpha. The fraction of the globallight of the galaxies in the clumps is higher on average for the interactinggalaxies than for the spirals. Thus the star forming regions in interactinggalaxies are more luminous, dustier, or younger on average.

A Comparative Study of Knots of Star Formation in Interacting vs. Spiral Galaxies