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

W Ursa Majoris (W UMa)-type contact binary systems (CBs) are usefulstatistical distance indicators because of their large numbers. Here, weestablish (orbital) period-luminosity relations (PLRs) in 12optical-to-mid-infrared bands (GBV RIJHKsW1W2W3W4) based on 183 nearby WUMa-type CBs with accurate Tycho-Gaia parallaxes. The 1{\sigma} dispersion ofthe PLRs decreases from optical to near- and mid-infrared wavelengths. Theminimum scatter, 0.16 mag, implies that W UMa-type CBs can be used to recoverdistances to 7% precision. Applying our newly determined PLRs to 19 openclusters containing W UMa-type CBs demonstrates that the PLR and open clusterCB distance scales are mutually consistent to within 1%. Adopting our PLRs assecondary distance indicators, we compiled a catalog of 55,603 CBs candidates,of which 80% have distance estimates based on a combination of optical, near-,and mid-infrared photometry. Using Fourier decomposition, 27,318high-probability W UMa-type CBs were selected. The resulting 8% distanceaccuracy implies that our sam- ple encompasses the largest number of objectswith accurate distances within a local volume with a radius of 3 kpc availableto date. The distribution of W UMa-type CBs in the Galaxy suggests that indifferent environments, the CB luminosity function may be different: largernumbers of brighter (longer-period) W UMa-type CBs are found in youngerenvironments.

Optical-Mid-Infrared Period-Luminosity Relations for W UMa-type Contact Binaries Based on Gaia DR 1: 8% Distance Accuracy