Number of the records: 1
HR 6819 is a binary system with no black hole Revisiting the source with infrared interferometry and optical integral field spectroscopy
- 1.0555907 - ASÚ 2023 RIV FR eng J - Journal Article
Frost, A. J. - Bodensteiner, J. - Rivinius, Th. - Baade, D. - Merand, A. - Selman, F. - Abdul-Masih, M. - Banyard, G. - Bordier, E. - Dsilva, K. - Hawcroft, C. - Mahy, L. - Reggiani, M. - Shenar, T. - Cabezas, Mauricio - Hadrava, Petr - Heida, M. - Klement, R. - Sana, H.
HR 6819 is a binary system with no black hole Revisiting the source with infrared interferometry and optical integral field spectroscopy.
Astronomy & Astrophysics. Roč. 659, March (2022), č. článku L3. ISSN 0004-6361. E-ISSN 1432-0746
Institutional support: RVO:67985815
Keywords : Be stars * emission-line * interferometric techniques:
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 6.5, year: 2022
Method of publishing: Open access with time embargo
https://doi.org/10.1051/0004-6361/202143004
We aim to distinguish between the two scenarios for HR 6819. Both models predict two luminous stars but with very different angular separations and orbital motions. 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. We obtained new high-angular resolution data with VLT/MUSE and VLTI/GRAVITY of HR 6819. The MUSE data are sensitive to bright companions at large scales, whilst the interferometric GRAVITY data are sensitive down to separations on mas scales and large magnitude differences. The MUSE observations reveal no bright companion at large separations and the GRAVITY observations indicate the presence of a stellar companion at an angular separation of ∼1.2 mas that moves on the plane of the sky over a timescale compatible with the known spectroscopic 40-day period.
Permanent Link: http://hdl.handle.net/11104/0330929
Number of the records: 1