| MIKULÁŠEK, Zdeněk, Jiří KRTIČKA, Gregory W. HENRY, Jan JANÍK, Juraj ZVERKO, Jozef ŽIŽNOVSKÝ, Miloslav ZEJDA, Jiří LIŠKA, Pavel ZVĚŘINA, Dimitry O. KUDRJAVTSEV, Iosif. I. ROMANYUK, Nikolay A. SOKOLOV;, Theresa LÜFTINGER, Corrado TRIGILIO, Coralie NEINER and Stefanus N. DE VILLIERS. Surprising variations in the rotation of the chemically peculiar stars CU Virginis and V 901 Orionis. Astronomy and Astrophysics. Paris: EDP Sciences, 2011, vol. 534, L5, p. 1-5. ISSN 0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/201117784. |
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@article{953966,
author = {Mikulášek, Zdeněk and Krtička, Jiří and Henry, Gregory W. and Janík, Jan and Zverko, Juraj and Žižnovský, Jozef and Zejda, Miloslav and Liška, Jiří and Zvěřina, Pavel and Kudrjavtsev, Dimitry O. and Romanyuk, Iosif. I. and Sokolov;, Nikolay A. and Lüftinger, Theresa and Trigilio, Corrado and Neiner, Coralie and de Villiers, Stefanus N.},
article_location = {Paris},
article_number = {L5},
doi = {http://dx.doi.org/10.1051/0004-6361/201117784},
keywords = {stars: chemically peculiar – stars: variables: general – stars: individual: CU Vir – stars: individual: V901 Ori – stars: rotation},
language = {eng},
issn = {0004-6361},
journal = {Astronomy and Astrophysics},
title = {Surprising variations in the rotation of the chemically peculiar stars CU Virginis and V 901 Orionis},
url = {http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201117784&Itemid=129},
volume = {534},
year = {2011}
}
TY - JOUR
ID - 953966
AU - Mikulášek, Zdeněk - Krtička, Jiří - Henry, Gregory W. - Janík, Jan - Zverko, Juraj - Žižnovský, Jozef - Zejda, Miloslav - Liška, Jiří - Zvěřina, Pavel - Kudrjavtsev, Dimitry O. - Romanyuk, Iosif. I. - Sokolov;, Nikolay A. - Lüftinger, Theresa - Trigilio, Corrado - Neiner, Coralie - de Villiers, Stefanus N.
PY - 2011
TI - Surprising variations in the rotation of the chemically peculiar stars CU Virginis and V 901 Orionis
JF - Astronomy and Astrophysics
VL - 534
IS - L5
SP - 1-5
EP - 1-5
PB - EDP Sciences
SN - 00046361
KW - stars: chemically peculiar – stars: variables: general – stars: individual: CU Vir – stars: individual: V901 Ori – stars: rotation
UR - http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201117784&Itemid=129
L2 - http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201117784&Itemid=129
N2 - We aim to study the stability of the periods in CU Vir and V901 Ori using all accessible observational data containing phase information. We found that the shapes of their phase curves were constant, while the periods were changing. Both stars exhibit alternating intervals of rotational braking and acceleration. The rotation period of CU Vir was gradually shortening until the year 1968, when it reached its local minimum of 0.52067198 d. The period then started increasing, reaching its local maximum of 0.5207163 d in the year 2005. Since that time the rotation has begun to accelerate again. We also found much smaller period changes in CU Vir on a timescale of several years. The rotation period of V901 Ori was increasing for the past quarter-century, reaching a maximum of 1.538771 d in the year 2003, when the rotation period began to decrease. A theoretically unexpected alternating variability of rotation periods in these stars would remove the spin-down time paradox and brings a new insight into structure and evolution of magnetic upper-main-sequence stars.
ER -
MIKULÁŠEK, Zdeněk, Jiří KRTIČKA, Gregory W. HENRY, Jan JANÍK, Juraj ZVERKO, Jozef ŽIŽNOVSKÝ, Miloslav ZEJDA, Jiří LIŠKA, Pavel ZVĚŘINA, Dimitry O. KUDRJAVTSEV, Iosif. I. ROMANYUK, Nikolay A. SOKOLOV;, Theresa LÜFTINGER, Corrado TRIGILIO, Coralie NEINER and Stefanus N. DE VILLIERS. Surprising variations in the rotation of the chemically peculiar stars CU Virginis and V 901 Orionis. \textit{Astronomy and Astrophysics}. Paris: EDP Sciences, 2011, vol.~534, L5, p.~1-5. ISSN~0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/201117784.
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