NEW PHOTOMETRICALLY VARIABLE MAGNETIC CHEMICALLY PECULIAR STARS
IN THE ASAS-3 ARCHIVE

J 2016

NEW PHOTOMETRICALLY VARIABLE MAGNETIC CHEMICALLY PECULIAR STARS IN THE ASAS-3 ARCHIVE

HUMMERICH, Stefan, Ernst PAUNZEN a Klaus BERNHARD

Základní údaje

Originální název

NEW PHOTOMETRICALLY VARIABLE MAGNETIC CHEMICALLY PECULIAR STARS IN THE ASAS-3 ARCHIVE

Autoři

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

Vydání

Astronomical Journal, BRISTOL, Springer Science+Business Media, 2016, 0004-6256

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

Impakt faktor

Impact factor: 2.609

Kód RIV

RIV/00216224:14310/16:00092549

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.3847/0004-6256/152/4/104

UT WoS

000385749000002

Klíčová slova anglicky

stars: chemically peculiar; stars: individual (V414 Pup); stars: rotation; stars: variables: general

Štítky

AKR, rivok

Změněno: 7. 4. 2017 14:00, Ing. Andrea Mikešková

Anotace

V originále

The magnetic Ap or CP2 stars are natural atomic and magnetic laboratories. Strictly periodic changes are observed in the spectra and brightness of these stars, which allow the derivation of rotational periods. Related to this group of objects are the He-weak (CP4) and He-rich stars, some of which also undergo brightness changes due to rotational modulation. Increasing the sample size of known rotational periods among CP2/4 stars is important and will contribute to our understanding of these objects and their evolution in time. We have compiled an extensive target list of CP2/4 stars from the General Catalog of Ap, HgMn, and Am stars, including several early-type (spectral types B/A) variables of undetermined type from the International Variable Star Index. We investigated our sample stars using publicly available observations from the ASAS-3 archive. Our previous efforts in this respect led to the discovery of 323 variable stars. Using a refined analysis approach, we were able to identify another 360 stars exhibiting photometric variability in ASAS-3 data. Summary data, folded light curves and, if available, information from the literature are presented for our final sample, which is composed of 334 bona-fide alpha(2) Canum Venaticorum (ACV) variables, 23 ACV candidates, and 3 eclipsing binary systems. Interesting and unusual objects are discussed in detail. In particular, we call attention to HD 66051 (V414 Pup), which is an eclipsing binary system showing obvious rotational modulation of the light curve due to the presence of an ACV variable in the system.

Návaznosti

LG15010, projekt VaV

Název: F. Magellanes: projekt podpory studia hvězd a hvězdných soustav na základě pozorování ze Země a z kosmického prostoru (Akronym: Magellan2015)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, F. Magellanes: projekt podpory studia hvězd a hvězdných soustav na základě pozorování ze Země a z kosmického prostoru

Citovat

HUMMERICH, Stefan, Ernst PAUNZEN a Klaus BERNHARD. NEW PHOTOMETRICALLY VARIABLE MAGNETIC CHEMICALLY PECULIAR STARS IN THE ASAS-3 ARCHIVE. Astronomical Journal. BRISTOL: Springer Science+Business Media, 2016, roč. 152, č. 4, s. "nestrankovano", 15 s. ISSN 0004-6256. Dostupné z: https://dx.doi.org/10.3847/0004-6256/152/4/104.

@article{1366023,
   author = {Hummerich, Stefan and Paunzen, Ernst and Bernhard, Klaus},
   article_location = {BRISTOL},
   article_number = {4},
   doi = {http://dx.doi.org/10.3847/0004-6256/152/4/104},
   keywords = {stars: chemically peculiar; stars: individual (V414 Pup); stars: rotation; stars: variables: general},
   language = {eng},
   issn = {0004-6256},
   journal = {Astronomical Journal},
   title = {NEW PHOTOMETRICALLY VARIABLE MAGNETIC CHEMICALLY PECULIAR STARS IN THE ASAS-3 ARCHIVE},
   volume = {152},
   year = {2016}
}

TY  - JOUR
ID  - 1366023
AU  - Hummerich, Stefan - Paunzen, Ernst - Bernhard, Klaus
PY  - 2016
TI  - NEW PHOTOMETRICALLY VARIABLE MAGNETIC CHEMICALLY PECULIAR STARS IN THE ASAS-3 ARCHIVE
JF  - Astronomical Journal
VL  - 152
IS  - 4
SP  - "nestrankovano"
EP  - "nestrankovano"
PB  - Springer Science+Business Media
SN  - 00046256
KW  - stars: chemically peculiar
KW  - stars: individual (V414 Pup)
KW  - stars: rotation
KW  - stars: variables: general
N2  - The magnetic Ap or CP2 stars are natural atomic and magnetic laboratories. Strictly periodic changes are observed in the spectra and brightness of these stars, which allow the derivation of rotational periods. Related to this group of objects are the He-weak (CP4) and He-rich stars, some of which also undergo brightness changes due to rotational modulation. Increasing the sample size of known rotational periods among CP2/4 stars is important and will contribute to our understanding of these objects and their evolution in time. We have compiled an extensive target list of CP2/4 stars from the General Catalog of Ap, HgMn, and Am stars, including several early-type (spectral types B/A) variables of undetermined type from the International Variable Star Index. We investigated our sample stars using publicly available observations from the ASAS-3 archive. Our previous efforts in this respect led to the discovery of 323 variable stars. Using a refined analysis approach, we were able to identify another 360 stars exhibiting photometric variability in ASAS-3 data. Summary data, folded light curves and, if available, information from the literature are presented for our final sample, which is composed of 334 bona-fide alpha(2) Canum Venaticorum (ACV) variables, 23 ACV candidates, and 3 eclipsing binary systems. Interesting and unusual objects are discussed in detail. In particular, we call attention to HD 66051 (V414 Pup), which is an eclipsing binary system showing obvious rotational modulation of the light curve due to the presence of an ACV variable in the system.
ER  -

HUMMERICH, Stefan, Ernst PAUNZEN a Klaus BERNHARD. NEW PHOTOMETRICALLY VARIABLE MAGNETIC CHEMICALLY PECULIAR STARS IN THE ASAS-3 ARCHIVE. \textit{Astronomical Journal}. BRISTOL: Springer Science+Business Media, 2016, roč.~152, č.~4, s.~''nestrankovano'', 15 s. ISSN~0004-6256. Dostupné z: https://dx.doi.org/10.3847/0004-6256/152/4/104.

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