Pulsational velocity fields in the atmospheres of two roAp stars HR 1217 and γ Equ

Details Pulsational velocity fields in the atmospheres of two roAp stars HR 1217 and γ Equ Pulsational velocity fields in the atmospheres of two roAp stars HR 1217 and γ Equ

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..310..208s&link_type=abstract

Variable Stars in the Local Group, IAU Colloquium 193, Proceedings of the conference held 6-11 July, 2003 at Christchurch, New Z

Astronomy and Astrophysics

Astronomy

20

Scientific paper

We discuss spectroscopic observations of pulsations in the roAp stars γ Equ and HR 1217. In both stars we observe strong variations of rare-earth lines and detect running magneto-acoustic waves, but do not find evidence for a standing pulsational wave. In γ Equ we find strong pulsational variations across line profiles, characteristic of l ≥ 2 modes.

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