Observations of UX Ori in deep minima with the Nordic Optical Telescope. I. Analysis of spectral lines

L. V. Tambovtseva, A. A. Djupvik, V. P. Grinin +11

UX Orionis stars are the most active young stars; they undergo sporadic fadings of 2 - 4 magnitudes in the V-band, due to variable circumstellar extinction caused by a nearly edge-…