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

We use photometric and spectroscopic observations of the detached eclipsingbinaries V40 and V41 in the globular cluster NGC 6362 to derive masses, radii,and luminosities of the component stars. The orbital periods of these systemsare 5.30 and 17.89 d, respectively. The measured masses of the primary andsecondary components ($M_p$, $M_s$) are (0.8337$\pm$0.0063, 0.7947$\pm$0.0048)M$_\odot$ for V40 and (0.8215$\pm$0.0058, 0.7280$\pm$0.0047) M$_\odot$ for V41.The measured radii ($R_p$, $R_s$) are (1.3253$\pm$0.0075, 0.997$\pm$0.013)R$_\odot$ for V40 and (1.0739$\pm$0.0048, 0.7307$\pm$0.0046) R$_\odot$ for V41.Based on the derived luminosities, we find that the distance modulus of thecluster is 14.74$\pm$0.04 mag -- in good agreement with 14.72 mag obtained fromCMD fitting. We compare the absolute parameters of component stars withtheoretical isochrones in mass-radius and mass-luminosity diagrams. For assumedabundances [Fe/H] = -1.07, [$\alpha$/Fe] = 0.4, and Y = 0.25 we find the mostprobable age of V40 to be 11.7$\pm$0.2 Gyr, compatible with the age of thecluster derived from CMD fitting (12.5$\pm$0.5 Gyr). V41 seems to be markedlyyounger than V40. If independently confirmed, this result will suggest that V41belongs to the younger of the two stellar populations recently discovered inNGC 6362. The orbits of both systems are eccentric. Given the orbital periodand age of V40, its orbit should have been tidally circularized some $\sim$7Gyr ago. The observed eccentricity is most likely the result of a relativelyrecent close stellar encounter.

The cluster ages experiment (CASE). VII. Analysis of two eclipsing binaries in the globular cluster NGC 6362