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.Základní údaje
Originální název
The record-breaking rotational deceleration of the He strong CP star HD 37776 (V901 Ori)
Název česky
Rekordní rotační brždění He silné chemicky pekuliární hvězdy HD 37776 (V901 Ori)
Autoři
MIKULÁŠEK, Zdeněk (203 Česká republika, garant), Jiří KRTIČKA (203 Česká republika), Juraj ZVERKO (703 Slovensko), G.W. HENRY (840 Spojené státy), Jan JANÍK (203 Česká republika), I.I. ROMANYUK (643 Rusko), Jozef ŽIŽNOVSKÝ (703 Slovensko), Hrvoje BOŹIČ (191 Chorvatsko), Miloslav ZEJDA (203 Česká republika), Tomáš GRÁF (203 Česká republika) a Martin NETOLICKÝ (203 Česká republika)
Vydání
Contributions of the Astronomical Observatory Skalnaté Pleso, Tatranska Lomnica, Slovak Republic, Astronomický ústav SAV, 2008, 1335-1842
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10308 Astronomy
Stát vydavatele
Slovensko
Utajení
není předmětem státního či obchodního tajemství
Kód RIV
RIV/00216224:14310/08:00024754
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000256514000061
Klíčová slova anglicky
stars: chemically peculiar; stars: early type; stars: variables; stars: individual: HD37776; stars: rotation; methods: data analysis;
Štítky
Příznaky
Mezinárodní význam
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.
Česky
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.
Návaznosti
| GA205/06/0217, projekt VaV |
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