New magnetic chemically peculiar stars and candidates in the
ATLAS first catalogue of variable stars

J 2021

New magnetic chemically peculiar stars and candidates in the ATLAS first catalogue of variable stars

BERNHARD, Klaus, Stefan HÜMMERICH, Ernst PAUNZEN a Johana SUPÍKOVÁ

Základní údaje

Originální název

New magnetic chemically peculiar stars and candidates in the ATLAS first catalogue of variable stars

Autoři

BERNHARD, Klaus, Stefan HÜMMERICH, Ernst PAUNZEN (40 Rakousko, domácí) a Johana SUPÍKOVÁ (203 Česká republika, domácí)

Vydání

Monthly Notices of the Royal Astronomical Society, Oxford University Press, 2021, 0035-8711

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 5.235

Kód RIV

RIV/00216224:14310/21:00125882

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1093/mnras/stab2065

UT WoS

000741355900027

Klíčová slova anglicky

stars: chemically peculiar; stars: variables: general

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 25. 5. 2022 10:48, Mgr. Marie Šípková, DiS.

Anotace

V originále

The number of known variable stars has increased by several magnitudes over the last decade, and automated classification routines are becoming increasingly important to cope with this development. Here we show that the ‘upside-down CBH variables’, which were proposed as a potentially new class of variable stars by Heinze et al. in the ATLAS First Catalogue of Variable Stars, are, at least to a high percentage, made up of α2 Canum Venaticorum (ACV) variables – that is, photometrically variable magnetic chemically peculiar (CP2/He-peculiar) stars – with distinct double-wave light curves. Using suitable selection criteria, we identified 264 candidate ACV variables in the ATLAS variable star catalogue. 62 of these objects were spectroscopically confirmed with spectra from the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (all new discoveries except for nine stars) and classified on the MK system. The other 202 stars are here presented as ACV star candidates that require spectroscopic confirmation. The vast majority of our sample of stars are main-sequence objects. Derived masses range from 1.4 M⊙ to 5 M⊙, with half our sample stars being situated in the range from 2 M⊙ to 2.4 M⊙, in good agreement with the spectral classifications. Most stars belong to the thin or thick disc; four objects, however, classify as members of the halo population. With a peak magnitude distribution at around 14th magnitude, the here presented stars are situated at the faint end of the known Galactic mCP star population. Our study highlights the need to consider rare variability classes, like ACV variables, in automated classification routines.

Návaznosti

98507, interní kód MU

Název: European Collaborating Astronomer ProjectS: Espana-Czechia-Slovakia (Akronym: ECAPS:E-C-S)

Investor: Evropská unie, European Collaborating Astronomer ProjectS: Espana-Czechia-Slovakia, Strategická partnerství v oblasti vzdělávání, odborné přípravy a mládeže

Citovat

BERNHARD, Klaus, Stefan HÜMMERICH, Ernst PAUNZEN a Johana SUPÍKOVÁ. New magnetic chemically peculiar stars and candidates in the ATLAS first catalogue of variable stars. Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2021, roč. 506, č. 3, s. 4561-4577. ISSN 0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stab2065.

@article{1855747,
   author = {Bernhard, Klaus and Hümmerich, Stefan and Paunzen, Ernst and Supíková, Johana},
   article_number = {3},
   doi = {http://dx.doi.org/10.1093/mnras/stab2065},
   keywords = {stars: chemically peculiar; stars: variables: general},
   language = {eng},
   issn = {0035-8711},
   journal = {Monthly Notices of the Royal Astronomical Society},
   title = {New magnetic chemically peculiar stars and candidates in the ATLAS first catalogue of variable stars},
   url = {https://academic.oup.com/mnras/article-abstract/506/3/4561/6324590},
   volume = {506},
   year = {2021}
}

TY  - JOUR
ID  - 1855747
AU  - Bernhard, Klaus - Hümmerich, Stefan - Paunzen, Ernst - Supíková, Johana
PY  - 2021
TI  - New magnetic chemically peculiar stars and candidates in the ATLAS first catalogue of variable stars
JF  - Monthly Notices of the Royal Astronomical Society
VL  - 506
IS  - 3
SP  - 4561-4577
EP  - 4561-4577
PB  - Oxford University Press
SN  - 00358711
KW  - stars: chemically peculiar
KW  - stars: variables: general
UR  - https://academic.oup.com/mnras/article-abstract/506/3/4561/6324590
N2  - The number of known variable stars has increased by several magnitudes over the last decade, and automated classification routines are becoming increasingly important to cope with this development. Here we show that the ‘upside-down CBH variables’, which were proposed as a potentially new class of variable stars by Heinze et al. in the ATLAS First Catalogue of Variable Stars, are, at least to a high percentage, made up of α2 Canum Venaticorum (ACV) variables – that is, photometrically variable magnetic chemically peculiar (CP2/He-peculiar) stars – with distinct double-wave light curves. Using suitable selection criteria, we identified 264 candidate ACV variables in the ATLAS variable star catalogue. 62 of these objects were spectroscopically confirmed with spectra from the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (all new discoveries except for nine stars) and classified on the MK system. The other 202 stars are here presented as ACV star candidates that require spectroscopic confirmation. The vast majority of our sample of stars are main-sequence objects. Derived masses range from 1.4 M⊙ to 5 M⊙, with half our sample stars being situated in the range from 2 M⊙ to 2.4 M⊙, in good agreement with the spectral classifications. Most stars belong to the thin or thick disc; four objects, however, classify as members of the halo population. With a peak magnitude distribution at around 14th magnitude, the here presented stars are situated at the faint end of the known Galactic mCP star population. Our study highlights the need to consider rare variability classes, like ACV variables, in automated classification routines.
ER  -

BERNHARD, Klaus, Stefan HÜMMERICH, Ernst PAUNZEN a Johana SUPÍKOVÁ. New magnetic chemically peculiar stars and candidates in the ATLAS first catalogue of variable stars. \textit{Monthly Notices of the Royal Astronomical Society}. Oxford University Press, 2021, roč.~506, č.~3, s.~4561-4577. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stab2065.

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