New and improved rotational periods of magnetic CP stars from ASAS-3, KELT, and MASCARA data

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00115737" target="_blank" >RIV/00216224:14310/20:00115737 - isvavai.cz</a>

Result on the web

<a href="https://academic.oup.com/mnras/article-abstract/493/3/3293/5737566?redirectedFrom=PDF" target="_blank" >https://academic.oup.com/mnras/article-abstract/493/3/3293/5737566?redirectedFrom=PDF</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/staa462" target="_blank" >10.1093/mnras/staa462</a>

Result language

angličtina

Original language name

New and improved rotational periods of magnetic CP stars from ASAS-3, KELT, and MASCARA data

Original language description

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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Volume of the periodical

493

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

38

Pages from-to

3293-3330

UT code for WoS article

000526035600015

EID of the result in the Scopus database

2-s2.0-85085393266