MIKULÁŠEK, Zdeněk, Jiří KRTIČKA, G.W. HENRY, Jan JANÍK, Miloslav ZEJDA, T. LUEFTINGER, Ernst PAUNZEN, I. I. ROMANYUK and D.O. KUDRYAVTSEV. Rotational period variations in magnetic chemically peculiar star HD 37776. In European Week of Astronomy and Space Science, JENAM 2011, July 4 to 8 2011 in Saint-Petersburg, Russia. 2011. |
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@proceedings{978705, author = {Mikulášek, Zdeněk and Krtička, Jiří and Henry, G.W. and Janík, Jan and Zejda, Miloslav and Lueftinger, T. and Paunzen, Ernst and Romanyuk, I. I. and Kudryavtsev, D.O.}, booktitle = {European Week of Astronomy and Space Science, JENAM 2011, July 4 to 8 2011 in Saint-Petersburg, Russia}, keywords = {chemical peculiar star; magnetic stars; photometry; V901 Ori}, language = {eng}, title = {Rotational period variations in magnetic chemically peculiar star HD 37776}, url = {http://jenam2011.org/conf/}, year = {2011} }
TY - CONF ID - 978705 AU - Mikulášek, Zdeněk - Krtička, Jiří - Henry, G.W. - Janík, Jan - Zejda, Miloslav - Lueftinger, T. - Paunzen, Ernst - Romanyuk, I. I. - Kudryavtsev, D.O. PY - 2011 TI - Rotational period variations in magnetic chemically peculiar star HD 37776 KW - chemical peculiar star KW - magnetic stars KW - photometry KW - V901 Ori UR - http://jenam2011.org/conf/ L2 - http://jenam2011.org/conf/ N2 - Three decades of a precise photometric and spectroscopic monitoring of the young hot magnetic chemically peculiar star HD 37776 have revealed its continual rotational deceleration, increasing the period by a remarkable 18 s! The deceleration was interpreted as the rotational braking of the outer stellar layers due to the angular momentum loss in the stellar magnetosphere. Observational data have been recently supplemented by own new photometric data. We present here the results of the sophisticated analysis of all available observed data showing that the period reached its maximum of 1.538766 d in the year 2004, when the rotation period began to decrease. The nature of such unpredicted period changes and the paradox of the spin-down time are briefly discussed. ER -
MIKULÁŠEK, Zdeněk, Jiří KRTIČKA, G.W. HENRY, Jan JANÍK, Miloslav ZEJDA, T. LUEFTINGER, Ernst PAUNZEN, I. I. ROMANYUK and D.O. KUDRYAVTSEV. Rotational period variations in magnetic chemically peculiar star HD 37776. In \textit{European Week of Astronomy and Space Science, JENAM 2011, July 4 to 8 2011 in Saint-Petersburg, Russia}. 2011.
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