Magnetic, chemically peculiar (CP2) stars in the SuperWASP
survey

J 2015

Magnetic, chemically peculiar (CP2) stars in the SuperWASP survey

BERNHARD, Klaus, Stefan HUMMERICH a Ernst PAUNZEN

Základní údaje

Originální název

Magnetic, chemically peculiar (CP2) stars in the SuperWASP survey

Autoři

BERNHARD, Klaus (40 Rakousko), Stefan HUMMERICH (276 Německo) a Ernst PAUNZEN (40 Rakousko, domácí)

Vydání

Astronomische Nachrichten, Potsdam, Germany, Astrophysikalisches Institut Potsdam, 2015, 0004-6337

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Německo

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 0.956

Kód RIV

RIV/00216224:14310/15:00087002

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1002/asna.201512214

UT WoS

000366512800006

Klíčová slova anglicky

Stars: chemically peculiar; stars: variables: general; techniques: photometric

Štítky

AKR, rivok

Změněno: 7. 4. 2016 09:35, Ing. Andrea Mikešková

Anotace

V originále

The magnetic chemically peculiar (CP2) stars of the upper main sequence are well-suited for investigating the impact of magnetic fields on the surface layers of stars, which leads to abundance inhomogeneities (spots) resulting in photometric variability. The light changes are explained in terms of the oblique rotator model; the derived photometric periods thus correlate with the rotational periods of the stars. CP2 stars exhibiting this kind of variability are classified as alpha(2) Canum Venaticorum (ACV) variables. We have analysed around 3 850 000 individual photometric WASP measurements of magnetic chemically peculiar (CP2) stars and candidates selected from the catalogue of Ap, HgMn, and Am stars, with the ultimate goal of detecting new ACV variables. In total, we found 80 variables, from which 74 are reported here for the first time. The data allowed us to establish variability for 23 stars which had been reported as probably constant in the literature before. Light curve parameters were obtained for all stars by a least-squares fit with the fundamental sine wave and its first harmonic. Because of the scarcity of Stromgren uvby beta measurements and the lack of parallax measurements with an accuracy better than 20%, we are not able to give reliable astrophysical parameters for the investigated objects. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Návaznosti

LH14300, projekt VaV

Název: Výzkum zvláštních proměnných hvězd

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Výzkum zvláštních proměnných hvězd

3SGA5916, interní kód MU

Název: Hvězdy a hvězdokupy v Magellanových mračnech (Akronym: Webda MaC)

Investor: Jihomoravský kraj, Hvězdy a hvězdokupy v Magellanových mračnech, Granty pro zahraniční vědce

7AMB12AT003, projekt VaV

Název: Proměnné hvězdy v otevřených hvězdokupách (Akronym: VSOC)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Proměnné hvězdy v otevřených hvězdokupách

Citovat

BERNHARD, Klaus, Stefan HUMMERICH a Ernst PAUNZEN. Magnetic, chemically peculiar (CP2) stars in the SuperWASP survey. Astronomische Nachrichten. Potsdam, Germany: Astrophysikalisches Institut Potsdam, 2015, roč. 336, č. 10, s. 981-990. ISSN 0004-6337. Dostupné z: https://dx.doi.org/10.1002/asna.201512214.

@article{1339323,
   author = {Bernhard, Klaus and Hummerich, Stefan and Paunzen, Ernst},
   article_location = {Potsdam, Germany},
   article_number = {10},
   doi = {http://dx.doi.org/10.1002/asna.201512214},
   keywords = {Stars: chemically peculiar; stars: variables: general; techniques: photometric},
   language = {eng},
   issn = {0004-6337},
   journal = {Astronomische Nachrichten},
   title = {Magnetic, chemically peculiar (CP2) stars in the SuperWASP survey},
   volume = {336},
   year = {2015}
}

TY  - JOUR
ID  - 1339323
AU  - Bernhard, Klaus - Hummerich, Stefan - Paunzen, Ernst
PY  - 2015
TI  - Magnetic, chemically peculiar (CP2) stars in the SuperWASP survey
JF  - Astronomische Nachrichten
VL  - 336
IS  - 10
SP  - 981-990
EP  - 981-990
PB  - Astrophysikalisches Institut Potsdam
SN  - 00046337
KW  - Stars: chemically peculiar
KW  - stars: variables: general
KW  - techniques: photometric
N2  - The magnetic chemically peculiar (CP2) stars of the upper main sequence are well-suited for investigating the impact of magnetic fields on the surface layers of stars, which leads to abundance inhomogeneities (spots) resulting in photometric variability. The light changes are explained in terms of the oblique rotator model; the derived photometric periods thus correlate with the rotational periods of the stars. CP2 stars exhibiting this kind of variability are classified as alpha(2) Canum Venaticorum (ACV) variables. We have analysed around 3 850 000 individual photometric WASP measurements of magnetic chemically peculiar (CP2) stars and candidates selected from the catalogue of Ap, HgMn, and Am stars, with the ultimate goal of detecting new ACV variables. In total, we found 80 variables, from which 74 are reported here for the first time. The data allowed us to establish variability for 23 stars which had been reported as probably constant in the literature before. Light curve parameters were obtained for all stars by a least-squares fit with the fundamental sine wave and its first harmonic. Because of the scarcity of Stromgren uvby beta measurements and the lack of parallax measurements with an accuracy better than 20%, we are not able to give reliable astrophysical parameters for the investigated objects. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
ER  -

BERNHARD, Klaus, Stefan HUMMERICH a Ernst PAUNZEN. Magnetic, chemically peculiar (CP2) stars in the SuperWASP survey. \textit{Astronomische Nachrichten}. Potsdam, Germany: Astrophysikalisches Institut Potsdam, 2015, roč.~336, č.~10, s.~981-990. ISSN~0004-6337. Dostupné z: https://dx.doi.org/10.1002/asna.201512214.

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