About: Period study of TW Draconis

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	TW Draconis is one of the most well known interacting Algol-type eclipsing binaries. We study time series data for the star accumulated over the past 150 years to detect changes in minima timings. Using 561 available minima timings, we compile an extended O-C diagram analysis. The first part ending around 1942 is characterised by smooth linear/parabolic course of timing residuals. In 1858-1905, the period was almost constant P=2.806513(9)d, but, in 1905-1942, the period increased. We interpret it as a result of continuous mass exchange at the mean rate of 6.9x10^-7 Ms year-1. Since 1942, the system has been showing alternating and shortening period changes with the length of a cycle of about two decades, modulated by short-term periodic variations. The latter small variations with the period 6.5 years are caused by the the presence of a third low-mass body in the system. Major oscillations can be explained as consequences of quadrupole moment variation in the system. TW Draconis is one of the most well known interacting Algol-type eclipsing binaries. We study time series data for the star accumulated over the past 150 years to detect changes in minima timings. Using 561 available minima timings, we compile an extended O-C diagram analysis. The first part ending around 1942 is characterised by smooth linear/parabolic course of timing residuals. In 1858-1905, the period was almost constant P=2.806513(9)d, but, in 1905-1942, the period increased. We interpret it as a result of continuous mass exchange at the mean rate of 6.9x10^-7 Ms year-1. Since 1942, the system has been showing alternating and shortening period changes with the length of a cycle of about two decades, modulated by short-term periodic variations. The latter small variations with the period 6.5 years are caused by the the presence of a third low-mass body in the system. Major oscillations can be explained as consequences of quadrupole moment variation in the system. (en)
Title	Period study of TW Draconis Period study of TW Draconis (en)
skos:prefLabel	Period study of TW Draconis Period study of TW Draconis (en)
skos:notation	RIV/00216224:14310/08:00025155!RIV10-GA0-14310___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA205/04/2063), P(GA205/06/0217), Z(MSM0021620860)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Zejda, Miloslav Mikulášek, Zdeněk Wolf, Marek
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	386276
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/08:00025155
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	stars: binaries: eclipsing; stars: individual: TW Dra; stars: fundamental parameters (en)
http://linked.open.../riv/klicoveSlovo	stars: binaries: eclipsing stars: fundamental parameters stars: individual: TW Dra
http://linked.open...odStatuVydavatele	FR - Francouzská republika
http://linked.open...ontrolniKodProRIV	[D9D7BC2E379C]
http://linked.open...i/riv/nazevZdroje	Astronomy and Astrophysics
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	New approaches to variable stars data processing and interpretation Photometric investigation of eclipsing binaries
http://linked.open...UplatneniVysledku	2008
http://linked.open...v/svazekPeriodika	489
http://linked.open...iv/tvurceVysledku	Mikulášek, Zdeněk Zejda, Miloslav Wolf, Marek
http://linked.open...ain/vavai/riv/wos	000259347400027
http://linked.open...n/vavai/riv/zamer	Fyzikální studium objektů a procesů ve sluneční soustavě a v astrofyzikálních systémech
issn	0004-6361
number of pages	6 (xsd:int)
http://localhost/t...ganizacniJednotka	14310
is http://linked.open...avai/riv/vysledek of	Period study of TW Draconis Period study of TW Draconis Period study of TW Draconis Period study of TW Draconis

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