About: Apsidal motion in five eccentric eclipsing binaries

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1051/0004-6361/201220505
Description	Aims. As part of the long-term Ondrejov and Ostrava observational projects, we aim to measure the precise times of minimum light for eccentric eclipsing binaries, needed for accurate determination of apsidal motion. Over fifty new times of minimum light recorded with CCD photometers were obtained for five early-type and eccentric-orbit eclipsing binaries: V785 Cas (P = 2.(d)70, e = 0.09), V821 Cas (1.(d)77, 0.14), V796 Cyg (1.(d)48, 0.07), V398 Lac (5.(d)41, 0.23), and V871 Per (3.(d)02, 0.24). Methods. O-C diagrams of binaries were analysed using all reliable timings found in the literature, and new elements of apsidal motion were obtained. Results. We derived for the first time or improved the relatively short periods of apsidal motion of about 83, 140, 33, 440, and 70 years for V785 Cas, V821 Cas, V796 Cyg, V398 Lac, and V871 Per, respectively. The internal structure constants, log k(2), for V821 Cas and V398 Lac are then found to be -2.70 and -2.35, under the assumption that the component stars rotate pseudosynchronously. The relativistic effects are weak, up to 7% of the total apsidal motion rate. Aims. As part of the long-term Ondrejov and Ostrava observational projects, we aim to measure the precise times of minimum light for eccentric eclipsing binaries, needed for accurate determination of apsidal motion. Over fifty new times of minimum light recorded with CCD photometers were obtained for five early-type and eccentric-orbit eclipsing binaries: V785 Cas (P = 2.(d)70, e = 0.09), V821 Cas (1.(d)77, 0.14), V796 Cyg (1.(d)48, 0.07), V398 Lac (5.(d)41, 0.23), and V871 Per (3.(d)02, 0.24). Methods. O-C diagrams of binaries were analysed using all reliable timings found in the literature, and new elements of apsidal motion were obtained. Results. We derived for the first time or improved the relatively short periods of apsidal motion of about 83, 140, 33, 440, and 70 years for V785 Cas, V821 Cas, V796 Cyg, V398 Lac, and V871 Per, respectively. The internal structure constants, log k(2), for V821 Cas and V398 Lac are then found to be -2.70 and -2.35, under the assumption that the component stars rotate pseudosynchronously. The relativistic effects are weak, up to 7% of the total apsidal motion rate. (en)
Title	Apsidal motion in five eccentric eclipsing binaries Apsidal motion in five eccentric eclipsing binaries (en)
skos:prefLabel	Apsidal motion in five eccentric eclipsing binaries Apsidal motion in five eccentric eclipsing binaries (en)
skos:notation	RIV/00216208:11320/13:10173965!RIV14-GA0-11320___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA205/04/2063), P(GA205/06/0217), P(GAP209/10/0715), Z(MSM0021620860)
http://linked.open...iv/cisloPeriodika	leden
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Zasche, Petr 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	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	61907
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/13:10173965
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	binaries: close; stars: general; stars: fundamental parameters; binaries: eclipsing (en)
http://linked.open.../riv/klicoveSlovo	binaries: eclipsing stars: fundamental parameters stars: general binaries: close
http://linked.open...odStatuVydavatele	FR - Francouzská republika
http://linked.open...ontrolniKodProRIV	[CC174337016A]
http://linked.open...i/riv/nazevZdroje	Astronomy and Astrophysics
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	New approaches to variable stars data processing and interpretation Photometric investigation of eclipsing binaries Accurate physical properties of hot stars based on binary and multiple star studies
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	549
http://linked.open...iv/tvurceVysledku	Svoboda, P. Zasche, Petr Wolf, Marek Kucakova, H. Lehky, M. Smelcer, L. Zejda, M.
http://linked.open...ain/vavai/riv/wos	000313745000108
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	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1051/0004-6361/201220505
http://localhost/t...ganizacniJednotka	11320

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