000007890 001__ 7890
000007890 005__ 20260203180939.0
000007890 0247_ $$2DOI$$a10.3390/galaxies13020029
000007890 037__ $$aSCART-2026-0079
000007890 100__ $$aLobel, A.
000007890 245__ $$aMultiplicity of Luminous Blue Variable Stars
000007890 260__ $$c2025
000007890 520__ $$aThe study of Luminous Blue Variables (LBVs) is critical to understanding the mechanisms behind their recurring S Dor-like outbursts, which can span decades and feature dramatic spectral changes. These outbursts may result from atmospheric instability or interactions with a companion star, but their causes remain poorly understood. Detecting binarity in LBVs through long-term radial velocity (RV) measurements, which can identify orbital motion via shifts in absorption lines, is a promising method. Periodic line shifts and variability can reveal the presence of a companion star. We report on the monitoring of four LBVs and two candidate LBVs (cLBVs), observing high-resolution spectra from 2009 to 2024. Although we do not find a clear periodic RV signal for LBVs MWC 930, P Cyg, or HD 168607, our long-term monitoring campaign previously detected the binarity of cLBV MWC 314 in 2013. For the first time, we detected a periodic signal in the RV data of the cLBV Schulte 12. In addition, in LBV HD 168607, we observed Discrete Absorption Components, indicative of large-scale structures in a rotating wind. These findings advance our understanding of the binary nature of LBVs and their complex outburst behaviors.
000007890 536__ $$aHorizon2020/$$cNo.823734/$$fEC-POEMS; Belspo/UF/2022/10
000007890 594__ $$aNO
000007890 6531_ $$amassive stars 
000007890 6531_ $$abinaries 
000007890 6531_ $$astellar winds 
000007890 6531_ $$aoutbursts 
000007890 6531_ $$aspectroscopy 
000007890 6531_ $$aradial velocity 
000007890 6531_ $$amonitoring
000007890 700__ $$aGorlova, N.
000007890 773__ $$cid.29$$n2$$pGalaxies$$v13$$y2025
000007890 8560_ $$falex.lobel@ksb-orb.be
000007890 85642 $$ahttps://www.mdpi.com/2075-4434/13/2/29
000007890 905__ $$apublished in
000007890 980__ $$aREFERD