HUMMERICH, Stefan, Ernst PAUNZEN and Klaus BERNHARD. NEW PHOTOMETRICALLY VARIABLE MAGNETIC CHEMICALLY PECULIAR STARS IN THE ASAS-3 ARCHIVE. Astronomical Journal. BRISTOL: Springer Science+Business Media, 2016, vol. 152, No 4, p. "nestrankovano", 15 pp. ISSN 0004-6256. Available from: https://dx.doi.org/10.3847/0004-6256/152/4/104.
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Basic information
Original name NEW PHOTOMETRICALLY VARIABLE MAGNETIC CHEMICALLY PECULIAR STARS IN THE ASAS-3 ARCHIVE
Authors HUMMERICH, Stefan (276 Germany), Ernst PAUNZEN (40 Austria, belonging to the institution) and Klaus BERNHARD (276 Germany).
Edition Astronomical Journal, BRISTOL, Springer Science+Business Media, 2016, 0004-6256.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Country of publisher United Kingdom of Great Britain and Northern Ireland
Confidentiality degree is not subject to a state or trade secret
Impact factor Impact factor: 2.609
RIV identification code RIV/00216224:14310/16:00092549
Organization unit Faculty of Science
Doi http://dx.doi.org/10.3847/0004-6256/152/4/104
UT WoS 000385749000002
Keywords in English stars: chemically peculiar; stars: individual (V414 Pup); stars: rotation; stars: variables: general
Tags AKR, rivok
Changed by Changed by: Ing. Andrea Mikešková, učo 137293. Changed: 7/4/2017 14:00.
Abstract
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.
Links
LG15010, research and development projectName: F. Magellanes: projekt podpory studia hvězd a hvězdných soustav na základě pozorování ze Země a z kosmického prostoru (Acronym: Magellan2015)
Investor: Ministry of Education, Youth and Sports of the CR
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