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 study the Be star $\delta$ Cen circumstellar disk using long-baselineinterferometry which is the only observing technique capable of resolvingspatially and spectroscopically objects smaller than 5 mas in the H and K band. We used the VLTI/AMBER instrument on January 6, 8, and 9, 2008, in the Hand K bands to complete low (35) and medium (150 0) spectral resolutionobservations. We detected an oscillation in the visibility curve plotted as afunction of the spatial frequency which is a clear signat ure of a companionaround $\delta$ Cen. Our best-fit soltution infers a binary separation of 68.7mas, a companion flux co ntribution in the K band of about 7% of the totalflux, a PA of 117.5 $\degr$, and an envelope flux around the Be primary thatcontributes up to about 50 % of the total flux, in agreement with our SpectralEnergy Distribution (SED) fit. The e nvelope size is estimated to be 1.6 mas inK but no departure from spherical symmetry is detected.

delta Cen: a new binary Be star detected by VLTI/AMBER spectro-interferometry