On the occurrence of a shock wave in the atmosphere of rho Puppis

Details On the occurrence of a shock wave in the atmosphere of rho Puppis On the occurrence of a shock wave in the atmosphere of rho Puppis

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...341..853m&link_type=abstract

Astronomy and Astrophysics, v.341, p.853-856 (1999)

Astronomy and Astrophysics

Astrophysics

1

Line: Profiles, Shock Waves, Stars: Individual: Rho Pup, Stars: Oscillations, Stars: Variables: Delta Sct

Scientific paper

New high temporal and spectral resolution observations of the Ca Ii K absorption profile of the delta Scuti star rho Puppis are presented. The data cover 1.2 pulsation cycle. Contrary to the result of Dravins et al. ( te{dls}), the line profile corresponding to the phase just before the maximum acceleration (monitored twice here), does not show any emission feature. Thus, the Ca Ii K emission may be of transient nature. Consequently, the intensity of the shock wave should be weak and strongly variable. This result is consistent with a previous study (Mathias et al. te{mgab}) where no shock wave signature was present in the Hα and metallic line profiles observed. Thus, additional observations are required to specify the frequency of occurrence of the transient emission. Based on observations obtained at the European Southern Observatory (La Silla, Chile)

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