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

It is conventionally thought that the state equation of dense matter softensand thus cannot result in high maximum mass if pulsars are quark stars, andthat a recently discovered $2M_\odot$ pulsar (PSR J1614-2230) may make quarkstars to be unlikely. However, this standard point of view would be revisitedand updated if quark clustering could occur in cold quark matter because of thestrong coupling between quarks at realistic baryon densities of compact stars,and it is addressed that the state equation of clustering quark matter stiffsto support compact stars with maximum mass $M_{\rm max}>2M_\odot$. In thisbrief note, it is demonstrated that large parameter spaces are allowed for$M_{\rm max}>2M_\odot$ in a Lennard-Jones model of clustered quark matter, andthe newly measured highest mass of PSR J1614-2230 would be meaningful toconstrain the number of quarks inside single quark-cluster, to be $N_q<\sim10^3$.

A note on the discovery of a 2M_\odot pulsar