About: The extremely rapid rotational braking of the magnetic helium-strong star HD 37776

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About: The extremely rapid rotational braking of the magnetic helium-strong star HD 37776 Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We attempt to confirm the possible period change of HD 37776 and discuss a possible origin of this change as a consequence of i) duplicity; ii) precession; iii) evolutionary changes; and iv) continuous/discrete/transient angular momentum loss. We analyse 1895 individual observations obtained by various techniques were processed simultaneously by means of specially developed robust codes. We confirm the previously suspected gradual increase in the period of HD 37776 and find that it has lengthened by a remarkable 17.7+/-0.7 s over the past 31 years. We also note that a decrease in the rate of the period change is not excluded by the data. The shapes of light curves in all colours were found to be invariable. We interpret this ongoing period increase as a braking of the star's rotation, at least in its surface layers, due to the momentum loss through events or processes in the extended stellar magnetosphere. We attempt to confirm the possible period change of HD 37776 and discuss a possible origin of this change as a consequence of i) duplicity; ii) precession; iii) evolutionary changes; and iv) continuous/discrete/transient angular momentum loss. We analyse 1895 individual observations obtained by various techniques were processed simultaneously by means of specially developed robust codes. We confirm the previously suspected gradual increase in the period of HD 37776 and find that it has lengthened by a remarkable 17.7+/-0.7 s over the past 31 years. We also note that a decrease in the rate of the period change is not excluded by the data. The shapes of light curves in all colours were found to be invariable. We interpret this ongoing period increase as a braking of the star's rotation, at least in its surface layers, due to the momentum loss through events or processes in the extended stellar magnetosphere. (en)
Title	The extremely rapid rotational braking of the magnetic helium-strong star HD 37776 The extremely rapid rotational braking of the magnetic helium-strong star HD 37776 (en)
skos:prefLabel	The extremely rapid rotational braking of the magnetic helium-strong star HD 37776 The extremely rapid rotational braking of the magnetic helium-strong star HD 37776 (en)
skos:notation	RIV/00216224:14310/08:00024779!RIV10-MSM-14310___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA205/06/0217), P(GA205/06/0584), P(KJB301630501), P(ME 128), P(MEB080832), Z(AV0Z10030501)
http://linked.open...iv/cisloPeriodika	485
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Zverko, Juraj Janík, Jan Zejda, Miloslav Korčáková, Daniela Žižnovský, Jozef Ceniga, Michal Netolický, Martin Mikulášek, Zdeněk Krtička, Jiří Gráf, Tomáš
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Masarykova univerzita / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	367516
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/08:00024779
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	stars: chemically peculiar; stars: early type; stars: variables: general; stars: individual: HD 37776 (en)
http://linked.open.../riv/klicoveSlovo	stars: chemically peculiar stars: early type stars: variables: general stars: individual: HD 37776
http://linked.open...odStatuVydavatele	FR - Francouzská republika
http://linked.open...ontrolniKodProRIV	[5B97FAB049F5]
http://linked.open...i/riv/nazevZdroje	Astronomy and Astrophysics
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	10 (xsd:int)
http://linked.open...cetTvurcuVysledku	17 (xsd:int)
http://linked.open...vavai/riv/projekt	New approaches to variable stars data processing and interpretation Spectral energy distribution in chemically peculiar stars and its variability The precise high dispersion spectroscopy of hot stars Time dependent models of multicomponent stellar winds http://linked.opendata.cz/resource/domain/vavai/projekt/ME%20128
http://linked.open...UplatneniVysledku	2008
http://linked.open...v/svazekPeriodika	2008
http://linked.open...iv/tvurceVysledku	Janík, Jan Mikulášek, Zdeněk Zejda, Miloslav Korčáková, Daniela Škoda, Petr Šlechta, Miroslav Krtička, Jiří Zverko, Juraj Žižnovský, Jozef Bohlender, David Henry, G. W. Gráf, Tomáš Netolický, Martin Ceniga, Michal Božič, Hrvoje Iliev, I.Kh. Romanyuk, I.I.
http://linked.open...ain/vavai/riv/wos	000256890300030
http://linked.open...n/vavai/riv/zamer	Astronomie a astrofyzika
issn	0004-6361
number of pages	13 (xsd:int)
http://localhost/t...ganizacniJednotka	14310

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