Detailed Information on Publication Record
2008
The record-breaking rotational deceleration of the He strong CP star HD 37776 (V901 Ori)
MIKULÁŠEK, Zdeněk, Jiří KRTIČKA, Juraj ZVERKO, G.W. HENRY, Jan JANÍK et. al.Basic information
Original name
The record-breaking rotational deceleration of the He strong CP star HD 37776 (V901 Ori)
Name in Czech
Rekordní rotační brždění He silné chemicky pekuliární hvězdy HD 37776 (V901 Ori)
Authors
MIKULÁŠEK, Zdeněk (203 Czech Republic, guarantor), Jiří KRTIČKA (203 Czech Republic), Juraj ZVERKO (703 Slovakia), G.W. HENRY (840 United States of America), Jan JANÍK (203 Czech Republic), I.I. ROMANYUK (643 Russian Federation), Jozef ŽIŽNOVSKÝ (703 Slovakia), Hrvoje BOŹIČ (191 Croatia), Miloslav ZEJDA (203 Czech Republic), Tomáš GRÁF (203 Czech Republic) and Martin NETOLICKÝ (203 Czech Republic)
Edition
Contributions of the Astronomical Observatory Skalnaté Pleso, Tatranska Lomnica, Slovak Republic, Astronomický ústav SAV, 2008, 1335-1842
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Country of publisher
Slovakia
Confidentiality degree
není předmětem státního či obchodního tajemství
RIV identification code
RIV/00216224:14310/08:00024754
Organization unit
Faculty of Science
UT WoS
000256514000061
Keywords in English
stars: chemically peculiar; stars: early type; stars: variables; stars: individual: HD37776; stars: rotation; methods: data analysis;
Tags
Tags
International impact
Změněno: 24/6/2009 11:25, doc. RNDr. Miloslav Zejda, Ph.D.
V originále
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.
In Czech
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.
Links
| GA205/06/0217, research and development project |
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