J 2024

Chemically peculiar stars on the pre-main sequence

KUESS, Lukas, Ernst PAUNZEN, Nikola FALTOVÁ, Daniel JADLOVSKÝ, Matúš LABAJ et. al.

Basic information

Original name

Chemically peculiar stars on the pre-main sequence

Authors

KUESS, Lukas, Ernst PAUNZEN (40 Austria, belonging to the institution), Nikola FALTOVÁ (203 Czech Republic, belonging to the institution), Daniel JADLOVSKÝ (203 Czech Republic, belonging to the institution), Matúš LABAJ (703 Slovakia, belonging to the institution), Marko MESARČ (703 Slovakia, belonging to the institution), Prapti MONDAL (356 India, belonging to the institution), Michal PRIŠEGEN (703 Slovakia), Tahereh RAMEZANI (364 Islamic Republic of Iran, belonging to the institution), Johana SUPÍKOVÁ (203 Czech Republic, belonging to the institution), Kateřina SVAČINKOVÁ (203 Czech Republic, belonging to the institution), Michaela VÍTKOVÁ (203 Czech Republic, belonging to the institution), Caiyun XIA (703 Slovakia, belonging to the institution), Klaus BERNHARD and Stefan HÜMMERICH

Edition

Astronomy & Astrophysics, EDP Sciences, 2024, 0004-6361

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

France

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 6.500 in 2022

Organization unit

Faculty of Science

DOI

UT WoS

001270740500012

Keywords in English

Stars: chemically peculiar; Stars: pre-main sequence; Stars: variables: general; open clusters and associations: general; Hertzsprung-Russell and C-M diagrams

Tags

Tags

International impact, Reviewed
Změněno: 20/9/2024 11:04, Tahereh Ramezani

Abstract

V originále

Context. The chemically peculiar (CP) stars of the upper main sequence are defined by spectral peculiarities that indicate unusual elemental abundance patterns in the presence of diffusion in the calm, stellar atmospheres. Some of them have a stable local magnetic field of up to several kiloGauss. The pre-main-sequence evolution of these objects is still a mystery and contains many open questions. Aims. We identify CP stars on the pre-main sequence to determine possible mechanisms that lead to the occurrence of chemical peculiarities in the (very) early stages of stellar evolution. Methods. We identified likely pre-main-sequence stars by fitting the spectral energy distributions. The subsequent analysis using stellar spectra and photometric time series helped us to distinguish between CP and non-CP stars. Additionally, we compared our results to the literature to provide the best possible quality assessment. Results. Out of 45 candidates, about 70 % seem to be true CP stars or CP candidates. Furthermore, 9 sources appear to be CP stars on the pre-main sequence, and all are magnetic. We finally report a possible CP2 star that is also a pre-main-sequence star and was not previously in the literature. Conclusions. The evolution of the peculiarities seems to be related to the (strong) magnetic fields in these CP2 stars.