000005513 001__ 5513
000005513 005__ 20240305153949.0
000005513 037__ $$aSCART-2021-0161
000005513 100__ $$aTrust, O.
000005513 245__ $$aHigh-resolution spectroscopy of “hump and spike” stars
000005513 260__ $$c2024
000005513 520__ $$aWe used data collected with the High Efficiency and Resolution Mercator Echelle Spectrograph (HERMES). We determined the spectral type of these stars and obtained the atmospheric stellar parameters such as effective temperatures, surface gravities, projected rotational, microturbulent and radial velocities. We also performed a detailed individual chemical abundance analysis for each target. We confirmed KIC 3459226 (kA2hF0mF3) and KIC 6266219 (kA3hA7mF1) as Am stars, KIC 9349245 as a marginal Am star, while KIC 4567097, KIC 4818496, KIC 5524045, KIC 5650229, KIC 7667560, and KIC 9272082 are non-Am stars. Using the MESA evolution code, the evaluation of the transport processes indicates that radiative diffusion, combined with turbulent mixing, thermohaline convection, and slow to moderate rotation can account for most of the chemical peculiarities found in Am stars. The differences in abundances suggest that there are other mechanisms at work, which are currently unknown, that contribute to the chemical anomalies identified in Am stars.
000005513 594__ $$aNO
000005513 700__ $$aJurua, E.
000005513 700__ $$aDe Cat, P.
000005513 700__ $$aJoshi, S.
000005513 773__ $$pProceedings of the 6th East African Astronomical Society Workshop$$y2022
000005513 8560_ $$fpeter.decat@observatoire.be
000005513 8564_ $$s248407$$uhttp://publi2-as.oma.be/record/5513/files/EAASW_proceeding_Otto.pdf
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000005513 905__ $$ain press to
000005513 980__ $$aNONREF