We discuss the compound effect of the chemical nonuniformities and pulsational velocity field on the rapid line profile variations, and assess the possibility of identifying pulsation modes by using spatialįiltering produced by an inhomogeneous abundance distribution. Investigations and theoretical modelling of non-radial oscillations in this star. The Doppler imaging analysis of HR 3831 forms a basis for subsequent detailed observational The exceedingly high quality of some of our spectroscopic data allowed us to reconstruct unprecedented details of abundance distributions, demonstrating a high level of complexity in the surface structure down to the resolution limit of the Doppler maps. Important observational constraints for modelling radiative diffusion in magnetic stars. Our study represents the most thorough examination of the surface chemical structure in a magnetic Ap star and provides The spectrum variability of HR 3831, and recover surface distributions of 17 chemical elements, including Li, C, O, Na, Mg, Si, Ca, Ti, Cr, Mn, Fe, Co, Ba, Y, Pr, Nd, Eu. Yelp is a fun and easy way to find, recommend and talk about whats great and not so great in.
We apply a multi-element abundance Doppler imaging inversion code for the analysis of A P Imaging Supplies in Granada Hills, reviews by real people. Magnetic intensification of lines in the spectrum of this star are consistent with aĭipolar magnetic topology with a magnetic obliquity and a polar strength kG. The variation of the longitudinal magnetic field of HR 3831 and the results of our analysis of the Star are combined with the Hipparcos parallax and evolutionary models to obtain new accurateĮstimates of the fundamental stellar parameters: K, ,Īnd an inclination angle of the stellar axis of rotation. Results of the model atmosphere analysis of the spectra of this We investigate magnetic field geometry and surface distribution of chemical elements in the rapidly oscillating Ap star HR 3831. Petersburg, Russiaĭepartment of Astronomy and Space Physics, Uppsala University, Box 515, 751 20 Uppsala, Sweden
Petersburg State University, Universitetsky pr.
Institut für Astronomie, Universität Wien, TürkenschanzstrWien, Austria e-mail: Nacional/MCT, Rua General Jose Cristino 77, 20921-400, Rio de Janeiro, Brazil