Herbig AeBe stars: Multiplicity and consequences

TL;DR

This paper reviews the multiplicity of Herbig AeBe stars, examining how their companion frequency and orbital properties relate to their protoplanetary disks, shedding light on star and planet formation around intermediate-mass stars.

Contribution

It provides a comprehensive review of multiplicity surveys for Herbig AeBe stars and explores the impact of companions on disk properties and formation processes.

Findings

Multiplicity frequency similar to lower-mass stars

Companions influence disk evolution and planet formation

Star and planet formation mechanisms are consistent across mass ranges

Abstract

By virtue of their young age and intermediate mass, Herbig AeBe stars represent a cornerstone for our understanding of the mass-dependency of both the stellar and planetary formation processes. In this contribution, I review the current state-of-the-art multiplicity surveys of Herbig AeBe stars to assess both the overall frequency of companions and the distribution of key orbital parameters (separation, mass ratio and eccentricity). In a second part, I focus on the interplay between the multiplicity of Herbig AeBe stars and the presence and properties of their protoplanetary disks. Overall, it appears that both star and planet formation in the context of intermediate-mass stars proceeds following similar mechanisms as lower-mass stars.