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Cyclic Variability in Brightness of the Young Solar Analog BE Ceti

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Abstract

BE Cet is a young solar analog with an age of 0.6 Gyr and a rotation period of 7.655 days. According to chromospheric and photospheric indices, its activity is higher than the solar one. An analysis of photometric data on the time interval between 1977 and 2019 shows the presence of only 6.76 yr cyclic variations in the mean brightness with an amplitude of 0.02 mag. The obtained cycle is 1–2 yr shorter in comparison with the chromospheric cycle determined earlier, whose length was estimated to be 9 or 7.6 yr. Parameters of the cycle, its amplitude and duration change slightly in different epochs. The short-term light variations due to rotational modulation occur with an increase in amplitude up to 0.05 mag near the activity cycle minimum and a decrease in its maximum. Some events of a rapid increase in brightness of 0.2–0.6 mag may be considered as flares.

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REFERENCES

  1. Baliunas, S.L., Donahue, R.A., Soon, W., et al., Chromospheric variations in main-sequence stars. II., Astrophys. J., 1995, vol. 438, pp. 269–287.

    Article  Google Scholar 

  2. Barbera, R., Análisis de Variabilidad Estelar (AVE code), 1998. http://www.gea.cesca.es.

  3. Bondar’, N.I., Katsova, M.M. and Shlyapnikov, A.A., Detection of optical flares on the selected G-M dwarfs from long-term photometric series, Geomagn. Aeron. (Engl. Transl.), 2021, vol. 61, no. 7, pp. 1069–1074.

  4. Boro Saikia, S., Marvin, C.J., Jeffers, S.V., et al., Chromospheric activity catalogue of 4454 cool stars. Questioning the active branch of stellar activity cycles, Astron. Astrophys., 2018, vol. 616, p. A108.

    Article  Google Scholar 

  5. Cayrel de Strobel, G. Knowles, N., Hernandez, G., and Bentolila, C., In search of real solar twins, Astron. Astrophys., 1981, vol. 94, pp. 1–11.

    Google Scholar 

  6. Chugainov, P.F., New variable star of BY Dra-type: HD 1835, Izv. Krym. Astrofiz. Obs., 1980, vol. 61, pp. 124–126.

    Google Scholar 

  7. Cutispoto, G., Long-term monitoring of active stars. IV. UBV(RI)_c observations obtained at La Silla in December 1989, Astron. Astrophys. Suppl. Ser., 1995, vol. 111, pp. 507–525.

    Google Scholar 

  8. Cutispoto, G., Long-term monitoring of active stars. VII. UBV(RI)_c photometry collected in March 1991, Astron. Astrophys. Suppl. Ser., 1998, vol. 127, pp. 207–215.

    Article  Google Scholar 

  9. Cutispoto, G., Messina, S., and Rodono, M., Long-term monitoring of active stars. X. Photometry, Astron. Astrophys., 2003, vol. 400, pp. 659–670.

    Article  Google Scholar 

  10. Eggen, O.J., Stellar groups, VII. The structure of the Hyades group, Mon. Not. R. Astron. Soc., 1960, vol. 120, pp. 540–562.

    Article  Google Scholar 

  11. Hardorp, J., The Sun among the stars. I. A search for solar spectral analog, Astron. Astrophys., 1978, vol. 63, pp. 383–390.

  12. Messina, S. and Guinan, E.F., Magnetic activity of six young solar analogues. I. Starspot cycles from long-term photometry, Astron. Astrophys., 2002, vol. 393, pp. 225–237.

    Article  Google Scholar 

  13. Oláh, K., Kovari, Zs., Petrovay, K., et al., Magnetic cycles at different ages of stars, Astron. Astrophys., 2016, vol. 590, p. A133.

    Article  Google Scholar 

  14. Pojmanski, G., The all sky automated survey, Acta Astron., 1997, vol. 47, pp. 467–481.

    Google Scholar 

  15. Radick, R.R., Lockwood, G.W., Skiff, B.A., and Baliunas, S.L., Patterns of variation among Sun-like stars, Astrophys. J. Suppl., 1998, vol. 118, pp. 239–258.

    Article  Google Scholar 

  16. Radick, R.R., Lockwood, G.W., Henry, G.W., et al., Patterns of variation for the Sun and Sun-like stars, Astrophys. J., 2018, vol. 855, p. 75.

    Article  Google Scholar 

  17. Stępień, K. and Geyer, E., Rotation of solar-like main sequence stars, Astron. Astrophys. Suppl. Ser., 1996, vol. 117, pp. 83–91.

    Article  Google Scholar 

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ACKNOWLEDGMENTS

We have used information from the International Variable Star Index (VSX) database supported by AAVSO, Cambridge, Massachusetts, USA, and we are thankful to all the staff providing the replenishment of these databases and access to the All-Sky Automated Survey and the Kamogata–Kiso–Kyoto Wide-Field Survey. The authors would like to thank the referees for useful comments and suggestions.

Funding

MK acknowledges the support of Ministry of Science and Higher Education of the Russian Federation, grant no. 075-15-2020-780.

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Authors and Affiliations

  1. Crimean Astrophysical Observatory, Russian Academy of Sciences, 298409, Nauchny, Russia

    N. I. Bondar

  2. Sternberg State Astronomical Institute, Lomonosov Moscow State University, 119991, Moscow, Russia

    M. M. Katsova

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  1. N. I. Bondar
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  2. M. M. Katsova
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Correspondence to N. I. Bondar or M. M. Katsova.

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Bondar, N.I., Katsova, M.M. Cyclic Variability in Brightness of the Young Solar Analog BE Ceti. Geomagn. Aeron. 62, 919–923 (2022). https://doi.org/10.1134/S0016793222070076

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