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@article{1365499,
author = {Skarka, Marek and Liška, Jiří and Auer, Reinhold Friedrich and Prudil, Zdeněk and Juráňová, Anna and Sódor, Ádám},
article_location = {Les Ulis},
article_number = {August},
doi = {http://dx.doi.org/10.1051/0004-6361/201628855},
keywords = {stars: variables: RR Lyrae; stars: horizontal-branch; methods: statistical},
language = {eng},
issn = {1432-0746},
journal = {Astronomy and Astrophysics},
title = {The SERMON project: 48 new field Blazhko stars and an investigation of modulation-period distribution},
url = {http://www.aanda.org/articles/aa/abs/2016/08/aa28855-16/aa28855-16.html},
volume = {592},
year = {2016}
}
TY - JOUR
ID - 1365499
AU - Skarka, Marek - Liška, Jiří - Auer, Reinhold Friedrich - Prudil, Zdeněk - Juráňová, Anna - Sódor, Ádám
PY - 2016
TI - The SERMON project: 48 new field Blazhko stars and an investigation of modulation-period distribution
JF - Astronomy and Astrophysics
VL - 592
IS - August
SP - "nestrankovano"
EP - "nestrankovano"
PB - EDP SCIENCES S A
SN - 14320746
KW - stars: variables: RR Lyrae
KW - stars: horizontal-branch
KW - methods: statistical
UR - http://www.aanda.org/articles/aa/abs/2016/08/aa28855-16/aa28855-16.html
L2 - http://www.aanda.org/articles/aa/abs/2016/08/aa28855-16/aa28855-16.html
N2 - We investigated 1234 fundamental mode RR Lyrae stars observed by the All Sky Automated Survey (ASAS) to identify the Blazhko (BL) effect. A sample of 1547 BL stars from the literature was collected to compare the modulation-period distribution with stars newly identified in our sample. A classical frequency spectra analysis was performed using Period04 software. Data points from each star from the ASAS database were analysed individually to avoid confusion with artificial peaks and aliases. Statistical methods were used in the investigation of the modulation-period distribution. Altogether we identified 87 BL stars (48 new detections), 7 candidate stars, and 22 stars showing long-term period variations. The distribution of modulation periods of newly identified BL stars corresponds well to the distribution of modulation periods of stars located in the Galactic field, Galactic bulge, Large Magellanic Cloud, and globular cluster M5 collected from the literature. As a very important by-product of this comparison, we found that pulsation periods of BL stars follow Gaussian distribution with the mean period of 0.54 +- 0.07 d, while the modulation periods show log-normal distribution with centre at log (Pm [d]) = 1.78 +- 0.30 dex. This means that 99.7 % of all known modulated stars have BL periods between 7.6 and 478 days. We discuss the identification of long modulation periods and show, that a significant percentage of stars showing long-term period variations could be classified as BL stars.
ER -
SKARKA, Marek, Jiří LIŠKA, Reinhold Friedrich AUER, Zdeněk PRUDIL, Anna JURÁŇOVÁ a Ádám SÓDOR. The SERMON project: 48 new field Blazhko stars and an investigation of modulation-period distribution. \textit{Astronomy and Astrophysics}. Les Ulis: EDP SCIENCES S A, 2016, roč.~592, August, s.~''nestrankovano'', 12 s. ISSN~1432-0746. Dostupné z: https://dx.doi.org/10.1051/0004-6361/201628855.
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