000004666 001__ 4666
000004666 005__ 20200127191725.0
000004666 037__ $$aCTALK-2020-0069
000004666 100__ $$aKobzar, O.
000004666 245__ $$aStudy of slowly rotating CP stars observed with TESS
000004666 260__ $$c2019
000004666 269__ $$c2019-07-09
000004666 520__ $$aSince the end of 2018, the Transiting Exoplanet Survey Satellite (TESS ) provides high-quality space data on stellar photometry to the astronomical community. We present the results of an analysis of TESS photometric data for known slowly rotating magnetic chemically peculiar (mCP) stars. In general, mCP stars show an inhomogeneous distribution of elements in their stellar atmospheres that leads to spectroscopic (line profile) and photometric (light curve) variations over the rotation period. In the frame of the oblique magnetic rotator (OMR) model, patches of enhanced chemical abundance on the stellar surface reveal the frequency of stellar rotation. Using this approach, we have compiled a list of slowly rotating mCP stars with rotation periods longer than two days from the analysis of the photometric data provided by TESS for the first eight sectors of observations.Slowly rotating mCP stars usually possess a hydrodynamically stable stellar atmosphere where a magnetic field can amplify the process of atomic diffusion and leads to the horizontal and vertical stratification of chemical abundances.
000004666 594__ $$aNO
000004666 6531_ $$achemical abundance
000004666 6531_ $$achemically peculiar stars
000004666 6531_ $$astellar rotation
000004666 6531_ $$aoblique magnetic rotator
000004666 700__ $$aKhalack, V.,
000004666 700__ $$aBohlender, D.,
000004666 700__ $$aDavid-Uraz, A.,
000004666 700__ $$aKashko, P.,
000004666 700__ $$aand 8, more
000004666 700__ $$aincl. Lampens, P.
000004666 773__ $$t"Stellar Magnetism: A Celebration of the Contributions of J.D. Landstreet", London, UK
000004666 8560_ $$fpatricia.lampens@observatoire.be
000004666 906__ $$aContributed
000004666 980__ $$aCTALKCONT