About: Apsidal motion in eccentric eclipsing binaries: CW Cephei, V478 Cygni, AG Persei, and IQ Persei

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About: Apsidal motion in eccentric eclipsing binaries: CW Cephei, V478 Cygni, AG Persei, and IQ Persei Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Aims: About thirty new times of minimum light recorded with photoelectric or CCD photometers were obtained for four early type eccentric orbit eclipsing binaries CW Cep (P=2.73d, e=0.029), V478 Cyg (2.88d, 0.016), AG Per (2.03d, 0.071), and IQ Per (1.74d, 0.076). Methods: Their O-C diagrams were analysed using all reliable timings found in the literature, and elements of apsidal motion were improved. Results: We confirm relatively short periods of apsidal motion of about 46, 27, 76, and 124 years for CW Cep, V478 Cyg, AG Per, and IQ Per, respectively. The corresponding internal structure constants, log k_2, are then found under the assumption that the component stars rotate pseudosynchronously. The relativistic effects are negligible, being up to 8% of the total apsidal motion rate in all systems. Using the light time effect solution, we have predicted a faint third component orbiting with a period of about 39 years for CW Cep. Aims: About thirty new times of minimum light recorded with photoelectric or CCD photometers were obtained for four early type eccentric orbit eclipsing binaries CW Cep (P=2.73d, e=0.029), V478 Cyg (2.88d, 0.016), AG Per (2.03d, 0.071), and IQ Per (1.74d, 0.076). Methods: Their O-C diagrams were analysed using all reliable timings found in the literature, and elements of apsidal motion were improved. Results: We confirm relatively short periods of apsidal motion of about 46, 27, 76, and 124 years for CW Cep, V478 Cyg, AG Per, and IQ Per, respectively. The corresponding internal structure constants, log k_2, are then found under the assumption that the component stars rotate pseudosynchronously. The relativistic effects are negligible, being up to 8% of the total apsidal motion rate in all systems. Using the light time effect solution, we have predicted a faint third component orbiting with a period of about 39 years for CW Cep. (en)
Title	Apsidal motion in eccentric eclipsing binaries: CW Cephei, V478 Cygni, AG Persei, and IQ Persei Apsidal motion in eccentric eclipsing binaries: CW Cephei, V478 Cygni, AG Persei, and IQ Persei (en)
skos:prefLabel	Apsidal motion in eccentric eclipsing binaries: CW Cephei, V478 Cygni, AG Persei, and IQ Persei Apsidal motion in eccentric eclipsing binaries: CW Cephei, V478 Cygni, AG Persei, and IQ Persei (en)
skos:notation	RIV/00216224:14310/06:00016382!RIV10-GA0-14310___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GA205/04/2063), P(GA205/06/0217)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Zejda, Miloslav Brát, Luboš Wolf, Marek Kučáková, Hana
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	465933
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/06:00016382
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	eclipsing binaries; CW Cep; V478 Cyg; AG Per; IQ Per; apsidal motion (en)
http://linked.open.../riv/klicoveSlovo	AG Per CW Cep IQ Per V478 Cyg eclipsing binaries apsidal motion
http://linked.open...odStatuVydavatele	FR - Francouzská republika
http://linked.open...ontrolniKodProRIV	[99BDA2C99D33]
http://linked.open...i/riv/nazevZdroje	Astronomy and Astrophysics
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	9 (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	2006
http://linked.open...v/svazekPeriodika	456
http://linked.open...iv/tvurceVysledku	Brát, Luboš Harmanec, Petr Hornoch, Kamil Kučáková, Hana Zejda, Miloslav Šťastný, P. Wolf, Marek Bozkurt, Z. Kolasa, Martin
http://linked.open...ain/vavai/riv/wos	000240370100025
issn	0004-6361
number of pages	7 (xsd:int)
http://localhost/t...ganizacniJednotka	14310
is http://linked.open...avai/riv/vysledek of	Apsidal motion in eccentric eclipsing binaries: CW Cephei, V478 Cygni, AG Persei, and IQ Persei Apsidal motion in eccentric eclipsing binaries: CW Cephei, V478 Cygni, AG Persei, and IQ Persei

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