Peculiar double-periodic pulsation in RR Lyrae stars of the OGLE collection - I. Long-period stars with dominant radial fundamental mode
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F16%3A00092993" target="_blank" >RIV/00216224:14310/16:00092993 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1093/mnras/stw1519" target="_blank" >http://dx.doi.org/10.1093/mnras/stw1519</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stw1519" target="_blank" >10.1093/mnras/stw1519</a>
Alternative languages
Result language
angličtina
Original language name
Peculiar double-periodic pulsation in RR Lyrae stars of the OGLE collection - I. Long-period stars with dominant radial fundamental mode
Original language description
We present the discovery of a new, peculiar form of double-periodic pulsation in RR Lyrae stars. In four, long-period (P>0.6 d) stars observed by the Optical Gravitational Lensing Experiment, and classified as fundamental mode pulsators (RRab), we detect additional, low-amplitude variability, with period shorter than fundamental mode period. The period ratios fall in a range similar to double-mode fundamental and first overtone RR Lyrae stars (RRd), with the exception of one star, in which the period ratio is significantly lower and nearly exactly equals 0.7. Although period ratios are fairly different for the four stars, the light-curve shapes corresponding to the dominant, fundamental mode are very similar. The peak-to-peak amplitudes and amplitude ratios (Fourier parameters R21 and R31) are among the highest observed in RRab stars of similar period, while Fourier phases (phi21 and phi31) are among the lowest observed in RRab stars.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
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Volume of the periodical
461
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
2934-2943
UT code for WoS article
000383481100048
EID of the result in the Scopus database
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