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

Reliable halo mass estimation for a given galaxy system plays an importantrole both in cosmology and galaxy formation studies. Here we set out to findthe way that can improve the halo mass estimation for those galaxy systems withlimited brightest member galaxies been observed. Using four mock galaxy samplesconstructed from semi-analytical formation models, the subhalo abundancematching method and the conditional luminosity functions, respectively, we findthat the luminosity gap between the brightest and the subsequent brightestmember galaxies in a halo (group) can be used to significantly reduce thescatter in the halo mass estimation based on the luminosity of the brightestgalaxy alone. Tests show that these corrections can significantly reduce thescatter in the halo mass estimations by $\sim 50\%$ to $\sim 70\%$ in massivehalos depending on which member galaxies are considered. Comparing to thetraditional ranking method, we find that this method works better for groupswith less than five members, or in observations with very bright magnitude cut.

Using member galaxy luminosities as halo mass proxies of galaxy groups