In: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 38, no. 2
O Kochukhov - T. Ryabchikova - S. Bagnulo - G. Locurto
Detaily:
Rok, strany: 2008, 423 - 424
Kľúčové slová:
stars: atmospheres, stars: chemically peculiar, stars: oscillations, stars: individual: HD 75445, HD 137909
URL originálneho zdroja: http://www.astro.sk/caosp/Eedition/Abstracts/2008/Vol_38/No_2/pp423-424_abstract.html
O článku:
We have obtained time-resolved spectroscopic observations for a sample
of 10
cool Ap stars using the ultra-stable spectrograph HARPS at the ESO 3.6 m telescope. The aim of
our study was to search for low-amplitude oscillations in Ap stars with no or inconclusive evidence
of pulsational variability. Here we report initial results of our investigation.
We confirm the presence of ≈ 16 min period pulsations in
β CrB (HD 137909) and
demonstrate multiperiodic character of oscillations in this star. Furthermore,
we discovered very
low amplitude 9-min pulsations in HD 75445 - an object spectroscopically
very similar to known roAp stars.
Ako citovať:
ISO 690:
Kochukhov, O., Ryabchikova, T., Bagnulo, S., Locurto, G. 2008. A search for very low amplitude magnetoacoustic pulsations with HARPS. In Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 38, no.2, pp. 423-424. 1335-1842.
APA:
Kochukhov, O., Ryabchikova, T., Bagnulo, S., Locurto, G. (2008). A search for very low amplitude magnetoacoustic pulsations with HARPS. Contributions of the Astronomical Observatory Skalnaté Pleso, 38(2), 423-424. 1335-1842.