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

Using the MEGAFLOW survey, which consists of a combination of MUSE and UVESobservations of 22 quasar fields selected to contain strong MgII absorbers, wemeasure covering fractions of CIV and MgII as a function of impact parameter$b$ using a novel Bayesian logistic regression method on unbinned data,appropriate for small samples. We also analyse how the CIV and MgII coveringfractions evolve with redshift. In the MUSE data, we found 215 $z=1-1.5$ [OII]emitters with fluxes $>10^{-17}$ erg\,s$^{-1}$\,cm$^{-2}$ and within 250 kpc ofquasar sight-lines. Over this redshift path $z=1-1.5$, we have 19 (32) CIV(MgII) absorption systems with rest-frame equivalent width (REW) $W_r>$0.05\AA\associated with at least one [OII] emitter. The covering fractions of$z\approx1.2$ CIV (MgII) absorbers with mean $W_r\approx$0.7\AA\ (1.0\AA),exceeds 50\% within 23$^{+62}_{-16}$ (46$^{+18}_{-13}$) kpc. Together withpublished studies, our results suggest that the covering fraction of CIV (MgII)becomes larger (smaller) with time, respectively. For absorption systems thathave CIV but not MgII, we find in 73\% of the cases no [OII] counterpart. Thismay indicate that the CIV comes from the intergalactic medium (IGM), i.e.beyond 250 kpc, or that it is associated with lower-mass or quiescent galaxies.

MusE GAs Flow and Wind (MEGAFLOW) VI. A study of CIV and MgII absorbing gas surrounding [OII] emitting galaxies