Ground-based observations of O and B stars

TL;DR

This paper discusses ground-based observational efforts for O and B stars, emphasizing their importance in asteroseismology, including campaigns and investigations into line-broadening phenomena.

Contribution

It reports on coordinated ground-based observational activities and their role in advancing understanding of massive OB stars and asteroseismic phenomena.

Findings

Successful coordination of open cluster campaigns

Insights into extra line-broadening in OB stars

Enhanced understanding of asteroseismic properties

Abstract

Ground-based observations are a strong tool for asteroseismic studies and even in the era of asteroseismic space missions they continue to play an important role. I will report on the activities of the CoRoT/SWG Ground-Based Observations Working Group, discuss the observational efforts of the Open Cluster campaigns and the search for the origin of extra line-broadening in massive OB stars