| MIKULÁŠEK, Zdeněk, Jiří KRTIČKA, Juraj ZVERKO, G.W. HENRY, Jan JANÍK, I.I. ROMANYUK, Jozef ŽIŽNOVSKÝ, Hrvoje BOŹIČ, Miloslav ZEJDA, Tomáš GRÁF a Martin NETOLICKÝ. The record-breaking rotational deceleration of the He strong CP star HD 37776 (V901 Ori). Contributions of the Astronomical Observatory Skalnaté Pleso. Tatranska Lomnica, Slovak Republic: Astronomický ústav SAV, 2008, roč. 38, č. 2, s. 429-430. ISSN 1335-1842. |
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@article{768688,
author = {Mikulášek, Zdeněk and Krtička, Jiří and Zverko, Juraj and Henry, G.W. and Janík, Jan and Romanyuk, I.I. and Žižnovský, Jozef and Boźič, Hrvoje and Zejda, Miloslav and Gráf, Tomáš and Netolický, Martin},
article_location = {Tatranska Lomnica, Slovak Republic},
article_number = {2},
keywords = {stars: chemically peculiar; stars: early type; stars: variables; stars: individual: HD37776; stars: rotation; methods: data analysis;},
language = {eng},
issn = {1335-1842},
journal = {Contributions of the Astronomical Observatory Skalnaté Pleso},
title = {The record-breaking rotational deceleration of the He strong CP star HD 37776 (V901 Ori)},
volume = {38},
year = {2008}
}
TY - JOUR
ID - 768688
AU - Mikulášek, Zdeněk - Krtička, Jiří - Zverko, Juraj - Henry, G.W. - Janík, Jan - Romanyuk, I.I. - Žižnovský, Jozef - Boźič, Hrvoje - Zejda, Miloslav - Gráf, Tomáš - Netolický, Martin
PY - 2008
TI - The record-breaking rotational deceleration of the He strong CP star HD 37776 (V901 Ori)
JF - Contributions of the Astronomical Observatory Skalnaté Pleso
VL - 38
IS - 2
SP - 429-430
EP - 429-430
PB - Astronomický ústav SAV
SN - 13351842
KW - stars: chemically peculiar
KW - stars: early type
KW - stars: variables
KW - stars: individual: HD37776
KW - stars: rotation
KW - methods: data analysis;
N2 - We study the long-term light and spectral variations in the He-strong, magnetic chemically peculiar star HD37776 to search for changes of its 1.5387d period in 1976 - 2007. We analyze all published photometric observations and spectrophotometry in the He I 4026 A line. The data were supplemented with 506 new UVB observations obtained during the last 2 observing seasons, 66 estimates of He I equivalent widths on 23 CFHT spectrograms and 69 on Zeeman spectrograms from the 6-m telescope. All the 1895 particular observations have been processed simultaneously. We confirm the previously suspected increase of the period which is a record among CP stars. The mean rate of the period increase during the last 31 years is 0.541+/-0.020 s per year. We interpret this ongoing period increase as the slowing down of the star's surface rotation due to momentum loss through events and processes in its magnetosphere.
ER -
MIKULÁŠEK, Zdeněk, Jiří KRTIČKA, Juraj ZVERKO, G.W. HENRY, Jan JANÍK, I.I. ROMANYUK, Jozef ŽIŽNOVSKÝ, Hrvoje BO$\backslash$'ZIČ, Miloslav ZEJDA, Tomáš GRÁF a Martin NETOLICKÝ. The record-breaking rotational deceleration of the He strong CP star HD 37776 (V901 Ori). \textit{Contributions of the Astronomical Observatory Skalnaté Pleso}. Tatranska Lomnica, Slovak Republic: Astronomický ústav SAV, 2008, roč.~38, č.~2, s.~429-430. ISSN~1335-1842.
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