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

In the course of our VLTI young stellar object PIONIER imaging program, wehave identified a strong visibility chromatic dependency that appeared incertain sources. This effect, rising value of visibilities with decreasingwavelengths over one base, is also present in previous published and archivalAMBER data. For Herbig AeBe stars, the H band is generally located at thetransition between the star and the disk predominance in flux for Herbig AeBestars. We believe that this phenomenon is responsible for the visibility riseeffect. We present a method to correct the visibilities from this effect inorder to allow "gray" image reconstruction software, like Mira, to be used. Inparallel we probe the interest of carrying an image reconstruction in eachspectral channel and then combine them to obtain the final broadband one. As anillustration we apply these imaging methods to MWC158, a (possibly Herbig) B[e]star intensively observed with PIONIER. Finally, we compare our result with aparametric model fitted onto the data.

Intricate visibility effects from resolved emission of young stellar objects: the case of MWC158 observed with the VLTI