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 report the results of analyses of galactic outflows in a sample of 45low-redshift starburst galaxies in the COS Legacy Archive Spectroscopic SurveY(CLASSY), augmented by five additional similar starbursts with COS data. Theoutflows are traced by blueshifted absorption-lines of metals spanning a widerange of ionization potential. The high quality and broad spectral coverage ofCLASSY data enable us to disentangle the absorption due to the static ISM fromthat due to outflows. We further use different line multiplets and doublets todetermine the covering fraction, column density, and ionization state as afunction of velocity for each outflow. We measure the outflow's mean velocityand velocity width, and find that both correlate in a highly significant waywith the star-formation rate, galaxy mass, and circular velocity over ranges offour orders-of-magnitude for the first two properties. We also estimate outflowrates of metals, mass, momentum, and kinetic energy. We find that, at most,only about 20% of silicon created and ejected by supernovae in the starburst iscarried in the warm phase we observe. The outflows' mass-loading factorincreases steeply and inversely with both circular and outflow velocity(log-log slope $\sim$ -1.6), and reaches $\sim 10$ for dwarf galaxies. We findthat the outflows typically carry about 10 to 100% of the momentum injected bymassive stars and about 1 to 20% of the kinetic energy. We show that theseresults place interesting constraints on, and new insights into, models andsimulations of galactic winds.

CLASSY III: The Properties of Starburst-Driven Warm Ionized Outflows