Chemically peculiar stars on the pre-main sequence

J 2024

Chemically peculiar stars on the pre-main sequence

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

Základní údaje

Originální název

Chemically peculiar stars on the pre-main sequence

Autoři

Vydání

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

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Francie

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL, URL

Impakt faktor

Impact factor: 5.800

Kód RIV

RIV/00216224:14310/24:00136292

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.1051/0004-6361/202348926

UT WoS

001270740500012

EID Scopus

2-s2.0-85198718191

Klíčová slova anglicky

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

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 20. 9. 2024 11:04, Tahereh Ramezani

Anotace

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.

Citovat

KUESS, Lukas; Ernst PAUNZEN; Nikola FALTOVÁ; Daniel JADLOVSKÝ; Matúš LABAJ; Marko MESARČ; Prapti MONDAL; Michal PRIŠEGEN; Tahereh RAMEZANI; Johana SUPÍKOVÁ; Kateřina SVAČINKOVÁ; Michaela VÍTKOVÁ; Caiyun XIA; Klaus BERNHARD a Stefan HÜMMERICH. Chemically peculiar stars on the pre-main sequence. Astronomy & Astrophysics. EDP Sciences, 2024, roč. 687, July 2024, s. 1-24. ISSN 0004-6361. Dostupné z: https://doi.org/10.1051/0004-6361/202348926.

@article{2412817,
   author = {Kueß, Lukas and Paunzen, Ernst and Faltová, Nikola and Jadlovský, Daniel and Labaj, Matúš and Mesarč, Marko and Mondal, Prapti and Prišegen, Michal and Ramezani, Tahereh and Supíková, Johana and Svačinková, Kateřina and Vítková, Michaela and Xia, Caiyun and Bernhard, Klaus and Hümmerich, Stefan},
   article_number = {July 2024},
   doi = {https://doi.org/10.1051/0004-6361/202348926},
   keywords = {Stars: chemically peculiar; Stars: pre-main sequence; Stars: variables: general; open clusters and associations: general; Hertzsprung-Russell and C-M diagrams},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy & Astrophysics},
   title = {Chemically peculiar stars on the pre-main sequence},
   url = {https://ui.adsabs.harvard.edu/abs/2024arXiv240508946K/abstract},
   volume = {687},
   year = {2024}
}

TY  - JOUR
ID  - 2412817
AU  - Kueß, Lukas - Paunzen, Ernst - Faltová, Nikola - Jadlovský, Daniel - Labaj, Matúš - Mesarč, Marko - Mondal, Prapti - Prišegen, Michal - Ramezani, Tahereh - Supíková, Johana - Svačinková, Kateřina - Vítková, Michaela - Xia, Caiyun - Bernhard, Klaus - Hümmerich, Stefan
PY  - 2024
TI  - Chemically peculiar stars on the pre-main sequence
JF  - Astronomy & Astrophysics
VL  - 687
IS  - July 2024
SP  - 1-24
EP  - 1-24
PB  - EDP Sciences
SN  - 00046361
KW  - Stars: chemically peculiar
KW  - Stars: pre-main sequence
KW  - Stars: variables: general
KW  - open clusters and associations: general
KW  - Hertzsprung-Russell and C-M diagrams
UR  - https://ui.adsabs.harvard.edu/abs/2024arXiv240508946K/abstract
N2  - 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.
ER  -

KUESS, Lukas; Ernst PAUNZEN; Nikola FALTOVÁ; Daniel JADLOVSKÝ; Matúš LABAJ; Marko MESARČ; Prapti MONDAL; Michal PRIŠEGEN; Tahereh RAMEZANI; Johana SUPÍKOVÁ; Kateřina SVAČINKOVÁ; Michaela VÍTKOVÁ; Caiyun XIA; Klaus BERNHARD a Stefan HÜMMERICH. Chemically peculiar stars on the pre-main sequence. \textit{Astronomy \&{} Astrophysics}. EDP Sciences, 2024, roč.~687, July 2024, s.~1-24. ISSN~0004-6361. Dostupné z: https://doi.org/10.1051/0004-6361/202348926.

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