Photometric Observations of LO Peg in 2014-2015

• Autorzy: Savanov I. S. , Puzin V. I. , Dmitrienko E. S. , Karpov S. V. , Beskin G. M. , Biryukov A. V. , Bondar S. F. , Ivanov E. A. , Katkova E. V. , Orekhova N. , Perkov A. V. , Sasyuk V. V. , Romanyuk I. I. , Semenko E. A. , Kudryavtsev D. , Karmakar S. , Pandey J. C. , Pandey S. B. , Joshi S. , Misra K.
• Języki publikacji: EN

Abstrakty

EN

We performed new observations of an ultra-fast rotator of the spectral class K - the LO Peg star - in SAO RAS in 2014 and in Zvenigorod Observatory of INASAN in 2015. The light curves were used to build the maps of temperature inhomogeneities on the LO Peg surface in order to determine the longitudes corresponding to the location of active regions. The obtained measurements suggest the ongoing evolution of movements of active regions and probably the cyclic character of such movements. According to our estimations, the area of the star surface covered with spots decreases and by now it reached 14% of the total visible area of its surface. New observations of the star in V filter allowed us to specify LO Peg long-term variability cycles. Based on spectropolarimetric observations of LO Peg the null result for measurements of mean longitudinal component of magnetic field is obtained.

Słowa kluczowe

EN

stars: activity; starspots; stars: magnetic field

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2016
• Tom: Vol. 66, No. 3
• Strony: 381--390
• Opis fizyczny: Bibliogr. 24 poz., rys.

Twórcy

autor

Savanov I. S.

• Institute of Astronomy of Russian Academy of Sciences, Pyatnitskaya, 48, 119017 Moscow, Russia

autor

Puzin V. I.

• Institute of Astronomy of Russian Academy of Sciences, Pyatnitskaya, 48, 119017 Moscow, Russia

autor

Dmitrienko E. S.

• Lomonosov Moscow State University, Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow 119992, Russia

autor

Karpov S. V.

• Special Astrophysical Observatory of Russian Academy of Sciences, Nizhniy Arkhyz, Russia
• Kazan Federal University, 18 Kremlevskaya st., Kazan, 420008 Russia

autor

Beskin G. M.

• Special Astrophysical Observatory of Russian Academy of Sciences, Nizhniy Arkhyz, Russia
• Kazan Federal University, 18 Kremlevskaya st., Kazan, 420008 Russia

autor

Biryukov A. V.

• Lomonosov Moscow State University, Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow 119992, Russia
• Kazan Federal University, 18 Kremlevskaya st., Kazan, 420008 Russia

autor

Bondar S. F.

• Precision Systems & Instruments Corp., 53 Aviamotornaya st., Moscow, 111024 Russia

autor

Ivanov E. A.

• Precision Systems & Instruments Corp., 53 Aviamotornaya st., Moscow, 111024 Russia

autor

Katkova E. V.

• Precision Systems & Instruments Corp., 53 Aviamotornaya st., Moscow, 111024 Russia

autor

Orekhova N.

• Precision Systems & Instruments Corp., 53 Aviamotornaya st., Moscow, 111024 Russia

autor

Perkov A. V.

• Precision Systems & Instruments Corp., 53 Aviamotornaya st., Moscow, 111024 Russia

autor

Sasyuk V. V.

• Kazan Federal University, 18 Kremlevskaya st., Kazan, 420008 Russia

autor

Romanyuk I. I.

• Special Astrophysical Observatory of Russian Academy of Sciences, Nizhniy Arkhyz, Russia

autor

Semenko E. A.

• Special Astrophysical Observatory of Russian Academy of Sciences, Nizhniy Arkhyz, Russia

autor

Kudryavtsev D.

• Special Astrophysical Observatory of Russian Academy of Sciences, Nizhniy Arkhyz, Russia

autor

Karmakar S.

• Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India

autor

Pandey J. C.

• Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India

autor

Pandey S. B.

• Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India

autor

Joshi S.

• Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India

autor

Misra K.

• Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India

Bibliografia

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• Chountonov, G.A. 2004, in: “Proceedings of the International Meeting on Magnetic Stars”, Eds. Yu. Glagolevskij, I. Romanyuk.286
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• Piluso N., Lanza, A.F., Pagano, I., Lanzafame, A.C., and Donati, J.-F. 2008, MNRAS, 387, 237.
• Puzin, V.B., Savanov, I.S., Romanyuk, I.I., Semenko, E.A., and Dmitrienko, E.S. 2014, Astrophysical Bulletin, 69, 321.
• Robb R.M., and Cardinal R.D. 1995, IBVS, 4221.
• Savanov I.S., and Strassmeier K.G. 2008, Astron. Nachr., 329, 364.
• Savanov, I.S 2010, Astronomy Reports, 54, 1125.
• Savanov, I.S., and Dmitrienko, E.S. 2011, Astronomy Reports, 55, 437.
• Savanov, I.S., Romanyuk, I.I., Semenko, E.A., and Dmitrienko, E.S. 2011, Astronomy Reports, 55, 111.
• Savanov, I.S., Romaniuk, I.I., Semenko, E.A., and Dmitrienko, E.S. 2013, Astronomy Reports, 57, 751.
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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).