GALEX UV survey of magnetic chemically peculiar stars in the Kepler prime field

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F25%3A00141885" target="_blank" >RIV/00216224:14310/25:00141885 - isvavai.cz</a>

Result on the web

<a href="https://academic.oup.com/mnras/article/538/4/3247/8104294" target="_blank" >https://academic.oup.com/mnras/article/538/4/3247/8104294</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/staf310" target="_blank" >10.1093/mnras/staf310</a>

Result language

angličtina

Original language name

GALEX UV survey of magnetic chemically peculiar stars in the Kepler prime field

Original language description

Magnetic chemically peculiar (mCP) stars are strongly magnetic upper main-sequence stars that exhibit light rotational variability due to an uneven surface distribution of certain peculiar elements, which may appear in phase at certain wavelengths and in antiphase to the flux at other wavelengths. We present a study of the properties of photometric variability of a sample of confirmed mCP stars (mostly Ap/CP2 stars), mCP star candidates, and several non-CP stars in the near-ultraviolet and visible wavelength regions based on observational data from the GALEX and Kepler prime missions. Antiphase variations between the near-ultraviolet and optical light curves are observed in the majority of mCP stars. We investigate the presence of a correlation of the variability amplitudes in both wavelength regions with effective temperature, surface gravity, and metallicity and calculate model atmospheres, spectral energy distributions, and synthetic light curves to connect our findings to theoretical models. While the theoretical calculations show that, at fixed abundances, a clear correlation between the light-curve amplitude ratios and effective temperature is expected, our sample does not show any correlation with the investigated properties. This may be due to the highly individualistic abundance patterns of our sample stars, which are the main contributors to the line blanketing in different wavelength bands.

Czech name

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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

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OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

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

538

Issue of the periodical within the volume

4

Country of publishing house

GB - UNITED KINGDOM

Number of pages

16

Pages from-to

3247-3262

UT code for WoS article

001459384800001

EID of the result in the Scopus database

2-s2.0-105002153899