MWC 560

T. Tomov, Bulgarian National Observatory, Rozhen, reports: "MWC 560 is a little observed star, classified by Bond et al. (1984, B.A.A.S. 16, 516) as symbiotic-like with a strong, variable, high-speed wind from the hot component. On Jan. 12 and 17 we obtained two spectra (range 360-490 nm, dispersion 1.8 nm/mm). Emission lines of H beta, H gamma and H delta are well visible. On the first spectrum very strong absorption lines are visible up to about H20. These absorption lines are violet-shifted relative to the emission lines by about -3000 km/s, and their full width of the continuum level is about 2000 km/s. It is especially interesting that the profiles of the Balmer lines are not of P-Cyg type. On the second spectrum the absorptions of all the Balmer lines show at least four violet-shifted components, with velocities of about -4000, -3000, -2300 and -600 km/s. The lack of P Cyg-type profiles, the high velocities of the absorption lines and their multi- component structure suggest that it is very possible that they formed in discrete jetlike ejections with a relatively high degree of collimation and with the direction of the ejection near to the line of sight."