Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pasp..113..821f&link_type=abstract
The Publications of the Astronomical Society of the Pacific, Volume 113, Issue 785, pp. 821-828.
Astronomy and Astrophysics
Astronomy
Stars: Early-Type, Stars: Emission-Line, Be, Stars: Individual (Hd 223960), Stars: Mass Loss, Stars: Winds, Outflows, Stars: Supergiants
Scientific paper
HD 223960, an A0 Ia-type supergiant in the Cas OB5 association, is unusual among Galactic supergiants of its class in having an Hα profile with double-peaked emission entirely above the continuum. We analyzed 12 high-resolution échelle spectra obtained in 1993-1995 and in 1999 with the 1 m telescope of Ritter Observatory. The radial velocities of photospheric Si, C, He, Ne, and S lines were found to be constant to within +/-2 km s-1, but the data suggest variability in the equivalent widths of Si II λλ6347, 6371 and several other photospheric lines. The radial velocities and equivalent widths and, especially, the ratio V/R of the Hα components vary. The present data do not indicate a binary explanation for the double-peaked emission feature. Alternative explanations are considered, but none is completely satisfactory. The available evidence is consistent with the star having a weak, fast wind.
Fischer William J.
Morrison Nancy D.
No associations
LandOfFree
Spectrum Variability of the A-Type Supergiant Star HD 223960 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spectrum Variability of the A-Type Supergiant Star HD 223960, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectrum Variability of the A-Type Supergiant Star HD 223960 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1205367