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Spectral Effects of Pulsations in Blue Supergiants

Published online by Cambridge University Press:  23 January 2015

S. Tomić ,
M. Kraus  and
M. E. Oksala
S. Tomić
Affiliation:
Astronomický Ústav AVČR, Fričova 298, 25165 Ondřejov, Czech Republic email: sanja@sunstel.asu.cas.cz
M. Kraus
Affiliation:
Astronomický Ústav AVČR, Fričova 298, 25165 Ondřejov, Czech Republic email: sanja@sunstel.asu.cas.cz
M. E. Oksala
Affiliation:
Astronomický Ústav AVČR, Fričova 298, 25165 Ondřejov, Czech Republic email: sanja@sunstel.asu.cas.cz
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Abstract

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We have been spectroscopically monitoring a number of blue supergiants, focusing on several strategic photospheric and wind lines. Our aim is to detect line profile variability, and to determine its origin. Here, we present preliminary results for ρ Leo and ε Ori. We conduct an asteroseismic analysis of Hei λ6678. We find in each star multiple periods raging from hours to several days. In addition, we observe strong, night to night variability in Hα.

Keywords

line: profilesstars: oscillationssupergiantsstars: early-type
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Issue S307: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry , June 2014 , pp. 235 - 236
Copyright
Copyright © International Astronomical Union 2015 

References

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