Stars with the B[e] phenomenon seen by long baseline interferometry

TL;DR

This paper utilizes long baseline interferometry to analyze the complex circumstellar environments of B[e] stars, revealing gaseous and dusty disks around two specific galactic stars, thereby enhancing understanding of their nature.

Contribution

It presents new interferometric measurements of two galactic B[e] stars, providing insights into their circumstellar geometry and contributing to the classification of these objects.

Findings

Detection of gaseous and dusty disks around HD 50138 and CPD-529243.

Enhanced understanding of the circumstellar structures in B[e] stars.

Support for the use of interferometry in classifying B[e] stars.

Abstract

Thanks to the high spatial resolution provided by long baseline interferometry, it is possible to understand the complex circumstellar geometry around stars with the B[e] phenomenon. These stars are composed by objects in different evolutionary stages, like high- and low-mass evolved stars, intermediate-mass pre-main sequence stars and symbiotic objects. However, up to now more than 50% of the confirmed B[e] stars are not well classified, being called unclassified B[e] stars. From instruments like VLTI/AMBER and VLTI/MIDI, we have identified the presence of gaseous and dusty circumstellar disks, which have provided us with some hints related to the nature of these objects. Here, we show our results for two galactic stars with the B[e] phenomenon, HD 50138 and CPD-529243, based on interferometric measurements.