We obtained new high-angular resolution data with VLT/MUSE and VLTI/GRAVITY of HR 6819. Therefore, the presence of bright sources in the 1−100 milliarcsec (mas) regime is a key diagnostic for determining the nature of the HR 6819 system. Both models predict two luminous stars but with very different angular separations and orbital motions. We aim to distinguish between the two scenarios for HR 6819.
Either scenario makes HR 6819 a cornerstone object as the stellar BH closest to Earth, or as an example of an important transitional, non-equilibrium phase for Be stars with solid evidence for its nature.Īims. Alternatively, it could be a binary composed of a stripped B star and a Be star in a close orbit.
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The system could consist of a close inner B-type giant plus a black hole (BH) binary with an additional Be companion in a wide orbit. Two scenarios have been proposed to match the existing observational constraints of the object HR 6819. The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USAĬontext. Royal Observatory of Belgium, Avenue CirculaBrussel, BelgiumĪnton Pannekoek Institute for Astronomy, University of Amsterdam, Postbus 94249, 1090 GE Amsterdam, The NetherlandsĪstronomical Institute, Academy of Sciences of the Czech Republic, Boční II 1401, 141 31 Praha 4, Czech Republic
München, GermanyĮuropean Organisation for Astronomical Research in the Southern Hemisphere (ESO), Casilla, 19001 Santiago 19, Chile Institute of Astronomy, KU Leuven, Celestijnlaan 200D, 3001 Leuven, BelgiumĮ-mail: Organisation for Astronomical Research in the Southern Hemisphere (ESO), Karl-Schwarzschild-Str. Astronomical objects: linking to databasesĪ.Including author names using non-Roman alphabets.Suggested resources for more tips on language editing in the sciences Punctuation and style concerns regarding equations, figures, tables, and footnotes