AMBER high-spectral resolution interferometry of Be stars: More than just stars and disks?

TL;DR

This paper presents high-resolution interferometric observations of Be stars that reveal complex features challenging existing models, suggesting the need for more sophisticated explanations beyond the traditional star-plus-disk paradigm.

Contribution

It provides new high-spectral resolution data showing complex interferometric profiles, highlighting the necessity for advanced modeling of Be stars.

Findings

Detection of complex visibility and phase profiles

Challenges to conventional star+disk models

Indication of additional physical components or processes

Abstract

High spectral-resolution Br-gamma VLTI/AMBER observations of classical Be stars reveal complex visibility, phase, and closure phase profiles, which were not seen in previous lower-resolution data. They present new challenges for the modeling of Be stars and may require additional ingredients over and above the conventional central star + circumstellar disk paradigm.