Multi-year and possibly periodic variations in the UV spectrum of 56 Pegasi

Details Multi-year and possibly periodic variations in the UV spectrum of 56 Pegasi Multi-year and possibly periodic variations in the UV spectrum of 56 Pegasi

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2349..400s&link_type=abstract

In NASA. Goddard Space Flight Center Future of Ultraviolet Astronomy Based on Six Years of IUE Res. p 400-403 (SEE N85-20961 1

Astronomy and Astrophysics

Astronomy

3

Iue, Periodic Variations, Radial Velocity, Supergiant Stars, Ultraviolet Spectra, Asymmetry, Binary Stars, Chromosphere, Line Spectra

Scientific paper

Radical variations in the Mg II emission profile of the late type supergiant 56 Peg have been observed to occur during the course of five years of IUE operations. Pronounced and possibly periodic changes in asymmetry, emission relative velocity and photospheric radial velocity are reported. The data can be viewed as either reflecting binary motion, or a strong enhancement (flare?) in the Mg II forming region, on a 4 to 5 year timescale.

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