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 searched for [OIII] 5007 emission in high resolution spectroscopicdata from Flames/Giraffe VLT observations of 174 massive globular clusters(GCs) in NGC4472. No planetary nebulae (PNe) are observed in these clusters,constraining the number of PNe per bolometric luminosity,\alpha<0.8*10^{-7}PN/L_{\odot}. This is significantly lower than the ratepredicted from stellar evolution, if all stars produce PNe. Comparing ourresults to populations of PNe in galaxies, we find most galaxies have a higher\alpha than these GCs (more PNe per bolometric luminosity - though some massiveearly-type galaxies do have similarly low \alpha). The low \alpha required inthese GCs suggests that the number of PNe per bolometric luminosity does notincrease strongly with decreasing mass or metallicity of the stellarpopulation. We find no evidence for correlations between the presence of knownGC PNe and either the presence of low mass X-ray binaries (LMXBs) or thestellar interaction rates in the GCs. This, and the low \alpha observed,suggests that the formation of PNe may not be enhanced in tight binary systems.These data do identify one [OIII] emission feature, this is the (previouslypublished) broad [OIII] emission from the cluster RZ 2109. This emission isthought to originate from the LMXB in this cluster, which is accreting atsuper-Eddington rates. The absence of any similar [OIII] emission from theother clusters favors the hypothesis that this source is a black hole LMXB,rather than a neutron star LMXB with significant geometric beaming of its X-rayemission.

astrophysical journal/the astrophysical journal

Limits on [OIII] 5007 emission from NGC4472's globular clusters:  constraints on planetary nebulae and ultraluminous black hole X-ray binaries  in globular clusters