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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

I estimate MOND M/L values for nine galaxy groups that were recently studiedby Tully et al.. Instead of the large M/L values that they find with Newtoniandynamics (up to 1200 solar units) the MOND estimates cluster around 1 solarunit. Tully et al. find a systematic and significant difference between the M/Lvalues of groups that do not contain luminous galaxies and those that do:Dwarfs-only groups have larger M/L values (by a factor of about 5). The MONDM/L values do not show this trend; the Newtonian disparity is traced back tothe dwarfs-only groups having systematically smaller intrinsic accelerations(similar sizes, but rather smaller velocity dispersions).Comment: 7 pages, Astrophys. J. Lett., in pres

Modified Newtonian Dynamics Mass-to-Light Ratios for Galaxy Groups