@article {41746,
	title = {Resolving the kinematics of the discs around Galactic B[e] supergiants},
	volume = {480},
	year = {2018},
	month = {2018/10/1},
	pages = {320 - 344},
	publisher = {OUP},
	abstract = {B[e] supergiants are luminous evolved massive stars. The mass-loss during this phase creates a complex circumstellar environment with atomic, molecular, and dusty regions usually found in rings or disc-like structures. For a better comprehension of the mechanisms behind the formation of these rings, detailed knowledge about their structure and dynamics is essential. To address that, we obtained high-resolution optical and near-infrared (near-IR) spectra for eight selected Galactic B[e] supergiants, for which CO emission has been detected. Assuming Keplerian rotation for the disc, we combine the kinematics obtained from the CO bands in the near-IR with those obtained by fitting the forbidden emission [O I] λ5577, [O I] λλ6300,6363, and [Ca II] λλ7291,7323 lines in the optical to probe the disc structure. We find that the emission originates from multiple ring structures around all B[e] supergiants, with each one of them displaying a unique combination of rings regardless of whether the object is part of a binary system. The confirmed binaries display spectroscopic variations of their line intensities and profiles as well as photometric variability, whereas the ring structures around the single stars are stable.},
	keywords = {Astrophysics - Solar and Stellar Astrophysics, circumstellar matter, outflows, stars: early-type, stars: massive, stars: winds, supergiants},
	isbn = {0035-8711},
	url = {https://ui.adsabs.harvard.edu/abs/2018MNRAS.480..320M},
	author = {Maravelias, G. and Kraus, M. and Cidale, L. S. and Borges Fernandes, M. and Arias, M. L. and Cur{\'e}, M. and Vasilopoulos, G.}
}
