RRab Variable T Men: The Period Variability and the Blazhko Effect
| Autor: | L. N. Berdnikov, Valery V. Kravtsov, A. Yu. Kniazev, A. K. Dambis |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
010308 nuclear & particles physics Astrophysics::High Energy Astrophysical Phenomena Blazhko effect Astrophysics::Instrumentation and Methods for Astrophysics Photometric system Astronomy and Astrophysics Astrophysics RR Lyrae variable Light curve 01 natural sciences law.invention Telescope Photometry (astronomy) Space and Planetary Science Observatory law 0103 physical sciences Magnitude (astronomy) Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | Astronomy Letters. 46:691-701 |
| ISSN: | 1562-6873 1063-7737 |
| DOI: | 10.1134/s1063773720100035 |
| Popis: | In 2012–2014 we obtained 3296 CCD frames in the $$BVI_{c}$$ photometric system for the RR Lyrae star T Men with the 76-cm telescope of the South African Astronomical Observatory (SAAO, SAR) and the 1-m telescopes of the Las Cumbres Observatory Global Telescope (LCOGT). Our observations showed a slightly increased scatter of data points on the light curve, which allowed the Blazhko effect with a period $${\sim}18\overset{\textrm{d}}{.}49$$ to be detected. To study the variability of the pulsation period, we used all the available observations, including 1325 magnitude estimates from the digitized Harvard Astronomical Plate Collection (the DASCH project). This allowed us to construct an $$O-C$$ diagram spanning a time interval of 125 years and for the first time to detect at least three abrupt changes in the pulsation period. |
| Databáze: | OpenAIRE |
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