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 present Adaptive Optics-aided speckle observations of 47 young stars inthe $\epsilon$ Cha association, made at the 4-m Southern Astrophysical ResearchTelescope in the $I$-band. We resolved 10 new binary pairs, 5 previously knownbinaries and two triple systems, also previously known. In the separation rangebetween 4 and 300 AU, the 30 association members of spectral types G0 and laterhost 6 binary companions, leading to the raw companion frequency of$0.010\pm0.04$ per decade of separation, comparable to the main sequence dwarfsin the field. On the other hand, all 5 massive association members of spectraltypes A and B have companions in this range. We discuss the newly resolved andknown binaries in our sample. Observed motions in the triple system $\epsilon$Cha, composed of three similar B9V stars, can be described by tentative orbitswith periods 13 and $\sim 900$ years, and a large mutual inclination.

New binaries in the epsilon Cha association