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@article{1660120,
author = {Bernhard, Klaus and Huemmerich, Stefan and Paunzen, Ernst},
article_location = {Oxford},
article_number = {3},
doi = {http://dx.doi.org/10.1093/mnras/staa462},
keywords = {stars: chemically peculiar; stars: rotation; stars: variables: general},
language = {eng},
issn = {0035-8711},
journal = {Monthly Notices of the Royal Astronomical Society},
title = {New and improved rotational periods of magnetic CP stars from ASAS-3, KELT, and MASCARA data},
url = {https://academic.oup.com/mnras/article-abstract/493/3/3293/5737566?redirectedFrom=PDF},
volume = {493},
year = {2020}
}
TY - JOUR
ID - 1660120
AU - Bernhard, Klaus - Huemmerich, Stefan - Paunzen, Ernst
PY - 2020
TI - New and improved rotational periods of magnetic CP stars from ASAS-3, KELT, and MASCARA data
JF - Monthly Notices of the Royal Astronomical Society
VL - 493
IS - 3
SP - 3293-3330
EP - 3293-3330
PB - Oxford University Press
SN - 00358711
KW - stars: chemically peculiar
KW - stars: rotation
KW - stars: variables: general
UR - https://academic.oup.com/mnras/article-abstract/493/3/3293/5737566?redirectedFrom=PDF
L2 - https://academic.oup.com/mnras/article-abstract/493/3/3293/5737566?redirectedFrom=PDF
N2 - Magnetic chemically peculiar (mCP) stars allow the investigation of such diverse phenomena as atomic diffusion, magnetic fields, and stellar rotation. The aim of the present investigation is to enhance our knowledge of the rotational properties ofmCP stars by increasing the sample of objects with accurately determined rotational periods. To this end, archival photometric time-series data from the ASAS-3, KELT, and MASCARA surveys were employed to improve existing rotational period information and derive rotational periods for mCP stars hitherto not known to be photometric variables. Our final sample consists of 294 mCP stars, a considerable amount of which (more than 40 per cent) are presented here as photometric variables for the first time. In addition, we identified 24 mCP star candidates that show light variability in agreement with rotational modulation but lack spectroscopic confirmation. The rotational period distribution of our sample agrees well with the literature. Most stars are between 100 Myr and 1Gyr old, with an apparent lack of very young stars. No objects were found on the zero-age main sequence; several stars seem to have evolved to the subgiant stage, albeit well before the first dredge-up. We identified four eclipsing binaries (HD244391, HD247441, HD248784, and HD252519), which potentially host an mCP star. This is of great interest because mCP stars are very rarely found in close binary systems, particularly eclipsing ones. Using archival spectra, we find strong evidence that the HD252519 system indeed harbours an mCP star component.
ER -
BERNHARD, Klaus, Stefan HUEMMERICH a Ernst PAUNZEN. New and improved rotational periods of magnetic CP stars from ASAS-3, KELT, and MASCARA data. \textit{Monthly Notices of the Royal Astronomical Society}. Oxford: Oxford University Press, 2020, roč.~493, č.~3, s.~3293-3330. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/staa462.
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