VLT observations of rapid radial velocity variations in roAp stars

In: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 38, no. 2

V. Elkin - D.w. Kurtz - G. Mathys

Detaily:

Rok, strany: 2008, 317 - 322

Kľúčové slová:

stars: oscillations, techniques: radial velocities

URL originálneho zdroja: http://www.astro.sk/caosp/Eedition/Abstracts/2008/Vol_38/No_2/pp317-322_abstract.html

Full text

O článku:

We have studied 27 out of the 37 known roAp stars with high resolution spectroscopy using UVES on the ESO VLT. All 27 stars show rapid radial velocity variations with periods similar to those obtained by photometry. Highest pulsation amplitudes are seen for lines of rare earth elements and the Hα core. For some stars other chemical species also have pulsation, but with smaller amplitudes. There are pulsational phase shifts between lines of different rare earth elements. Stars with stronger magnetic fields tend to have lower radial velocity pulsation amplitudes.

Ako citovať:

ISO 690:

Elkin, V., Kurtz, D., Mathys, G. 2008. VLT observations of rapid radial velocity variations in roAp stars. In Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 38, no.2, pp. 317-322. 1335-1842.

APA:

Elkin, V., Kurtz, D., Mathys, G. (2008). VLT observations of rapid radial velocity variations in roAp stars. Contributions of the Astronomical Observatory Skalnaté Pleso, 38(2), 317-322. 1335-1842.