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

We present an extensive set of photometry and radial velocities for thedetached eclipsing binary KV 29 in the intermediate-aged open cluster M11 (NGC6705). Spectroscopy shows that the system is double-lined and all availableevidence (proper motion, photometry, and position on the CMD) indicates it is amember of the cluster. We find the period of the binary to be$4.64276\pm0.00001$ days. We find masses $3.604^{+0.002}_{-0.011}M_\odot$ and$1.837^{+0.001}_{-0.006}M_\odot$, and radii $5.392^{+0.018}_{-0.035}R_\odot$and $1.656^{+0.007}_{-0.044}R_\odot$ for the primary and secondary stars,respectively. Because the primary star in the binary is rapidly evolving and isbrighter than the cluster turnoff in a color-magnitude diagram, the measurementof its radius leads to a strong constraint on the cluster age. We find the ageof M11 to be $222^{+2}_{-3}\pm15$ Myr, where the quoted uncertainties come fromstatistical errors in the calculated masses and radii, and systematicuncertainties due to the ambiguity of the metallicity of the open cluster andvariations within the isochrone models concerning heavy elements and convectiveovershooting.

The Detached Eclipsing Binary KV29 and the Age of the Open Cluster M11