000006672 001__ 6672
000006672 005__ 20240228180624.0
000006672 0247_ $$2DOI$$a10.1093/mnras/stad1936
000006672 037__ $$aSCART-2024-0044
000006672 100__ $$aTrust, Otto
000006672 245__ $$aHighHigh-precision photometric and high-resolution spectroscopic characterization of HD 180347
000006672 260__ $$c2023
000006672 520__ $$aWe report the analysis of high-precision space-based photometric and high-resolution spectroscopic observations of HD 180347. The high-quality light curves from the Transiting Exoplanet Survey Satellite (TESS) under sectors 14, 15, and 26 were used. By visual inspection of the light curves and the Fourier transforms, only low-frequency signals (less than 1 d^{-1}) were detected. After using wavelet, autocorrelation, and composite spectrum analyses, HD 180347 is classified as a rotational variable with a period of about 4.1 ± 0.2 d. In reference to the observation limit of TESS, no pulsations were detected. For the spectroscopic analysis, we used data collected with the High Efficiency and Resolution Mercator Échelle Spectrograph (HERMES). We determined the spectral type of this star and obtained atmospheric parameters such as the effective temperature, the surface gravity, and the projected rotational, microturbulent, and radial velocities. We performed a detailed chemical abundance analysis. The LTE abundances were derived for 25 chemical elements. For 13 of them, including Ca, Sc, Sr, Zr, and Ba, which are important for the characterization of chemical peculiarities, we also present the non-local thermodynamic equilibrium (NLTE) abundances. NLTE improves the accuracy of the derived abundances and confirms that Ca and Sc are depleted in HD 180347 relative to their solar abundances, while the heavy elements beyond Sr are enhanced, by more than 0.7 dex. Based on the spectral class and the element abundance pattern, we classify this star as Am (kA1hA8mA8).
000006672 536__ $$aBL/$$c33/$$fIN12 (BINA)
000006672 594__ $$aNO
000006672 6531_ $$astars: abundances
000006672 6531_ $$astars: chemically peculiar
000006672 6531_ $$astars: fundamental parameters
000006672 6531_ $$astars: rotation
000006672 6531_ $$astarspots
000006672 6531_ $$astars: individual: HD 180347
000006672 700__ $$aMashonkina, Lyudmila
000006672 700__ $$aJurua, Edward
000006672 700__ $$aDe Cat, Peter
000006672 700__ $$aTsymbal, Vadim
000006672 700__ $$aJoshi, Santosh
000006672 773__ $$c1044--1060$$n1$$pMonthly Notices of the Royal Astronomical Society$$v524
000006672 8560_ $$fpeter.decat@ksb-orb.be
000006672 8564_ $$s2795487$$uhttp://publi2-as.oma.be/record/6672/files/Trust2023_MNRAS524_1044.pdf
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000006672 905__ $$apublished in
000006672 980__ $$aREFERD