Periodic variable A-F spectral type stars in the southern TESS
continuous viewing zone: I. Identification and classification

J 2024

Periodic variable A-F spectral type stars in the southern TESS continuous viewing zone: I. Identification and classification

SKARKA, Marek a Zbyněk HENZL

Základní údaje

Originální název

Periodic variable A-F spectral type stars in the southern TESS continuous viewing zone: I. Identification and classification

Autoři

SKARKA, Marek (203 Česká republika, domácí) a Zbyněk HENZL

Vydání

Astronomy and 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

Impakt faktor

Impact factor: 6.500 v roce 2022

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1051/0004-6361/202450711

UT WoS

001280641700027

Klíčová slova anglicky

methods: data analysis; catalogs; stars: oscillations; stars: rotation; stars: variables: general

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 16. 8. 2024 11:16, Mgr. Marie Šípková, DiS.

Anotace

V originále

Aims. Our primary objective is to accurately identify and classify the variability of A-F stars in the southern continuous viewing zone of the TESS satellite. The brightness limit was set to 10 mag to ensure the utmost reliability of our results and allow for spectroscopic follow-up observations using small telescopes. We aim to compare our findings with existing catalogues of variable stars. Methods. The light curves from TESS and their Fourier transform were used to manually classify stars in our sample. Cross-matching with other catalogues was performed to identify contaminants and false positives. Results. We have identified 1171 variable stars (51% of the sample). Among these variable stars, 67% have clear classifications, which includes δ Sct and γ Dor pulsating stars and their hybrids, rotationally variables, and eclipsing binaries. We have provided examples of the typical representatives of variable stars and discussed the ambiguous cases. We found 20 pairs of stars with the same frequencies and identified the correct source of the variations. Additionally, we found that the variations in 12 other stars are caused by contamination from the light of faint nearby large-amplitude variable stars. To compare our sample with other variable star catalogues, we have defined two parameters reflecting the agreement in identification of variable stars and their classification. This comparison reveals intriguing disagreements in classification ranging from 52 to 100%. However, if we assume that stars without specific types are only marked as variable, then the agreement is relatively good, ranging from 57 to 85% (disagreement 15–43%). We have demonstrated that the TESS classification is superior to the classification based on other photometric surveys. Conclusions. The classification of stellar variability is complex and requires careful consideration. Caution should be exercised when using catalogue classifications.

Citovat

SKARKA, Marek a Zbyněk HENZL. Periodic variable A-F spectral type stars in the southern TESS continuous viewing zone: I. Identification and classification. Astronomy and Astrophysics. EDP Sciences, 2024, roč. 688, August 2024, s. 1-10. ISSN 0004-6361. Dostupné z: https://dx.doi.org/10.1051/0004-6361/202450711.

@article{2423338,
   author = {Skarka, Marek and Henzl, Zbyněk},
   article_number = {August 2024},
   doi = {http://dx.doi.org/10.1051/0004-6361/202450711},
   keywords = {methods: data analysis; catalogs; stars: oscillations; stars: rotation; stars: variables: general},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy and Astrophysics},
   title = {Periodic variable A-F spectral type stars in the southern TESS continuous viewing zone: I. Identification and classification},
   url = {https://www.aanda.org/articles/aa/full_html/2024/08/aa50711-24/aa50711-24.html},
   volume = {688},
   year = {2024}
}

TY  - JOUR
ID  - 2423338
AU  - Skarka, Marek - Henzl, Zbyněk
PY  - 2024
TI  - Periodic variable A-F spectral type stars in the southern TESS continuous viewing zone: I. Identification and classification
JF  - Astronomy and Astrophysics
VL  - 688
IS  - August 2024
SP  - 1-10
EP  - 1-10
PB  - EDP Sciences
SN  - 00046361
KW  - methods: data analysis
KW  - catalogs
KW  - stars: oscillations
KW  - stars: rotation
KW  - stars: variables: general
UR  - https://www.aanda.org/articles/aa/full_html/2024/08/aa50711-24/aa50711-24.html
N2  - Aims. Our primary objective is to accurately identify and classify the variability of A-F stars in the southern continuous viewing zone of the TESS satellite. The brightness limit was set to 10 mag to ensure the utmost reliability of our results and allow for spectroscopic follow-up observations using small telescopes. We aim to compare our findings with existing catalogues of variable stars. Methods. The light curves from TESS and their Fourier transform were used to manually classify stars in our sample. Cross-matching with other catalogues was performed to identify contaminants and false positives. Results. We have identified 1171 variable stars (51% of the sample). Among these variable stars, 67% have clear classifications, which includes δ Sct and γ Dor pulsating stars and their hybrids, rotationally variables, and eclipsing binaries. We have provided examples of the typical representatives of variable stars and discussed the ambiguous cases. We found 20 pairs of stars with the same frequencies and identified the correct source of the variations. Additionally, we found that the variations in 12 other stars are caused by contamination from the light of faint nearby large-amplitude variable stars. To compare our sample with other variable star catalogues, we have defined two parameters reflecting the agreement in identification of variable stars and their classification. This comparison reveals intriguing disagreements in classification ranging from 52 to 100%. However, if we assume that stars without specific types are only marked as variable, then the agreement is relatively good, ranging from 57 to 85% (disagreement 15–43%). We have demonstrated that the TESS classification is superior to the classification based on other photometric surveys. Conclusions. The classification of stellar variability is complex and requires careful consideration. Caution should be exercised when using catalogue classifications.
ER  -

SKARKA, Marek a Zbyněk HENZL. Periodic variable A-F spectral type stars in the southern TESS continuous viewing zone: I. Identification and classification. \textit{Astronomy and Astrophysics}. EDP Sciences, 2024, roč.~688, August 2024, s.~1-10. ISSN~0004-6361. Dostupné z: https://dx.doi.org/10.1051/0004-6361/202450711.

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