About: New Period Investigation of Algol-like Near-Contact Binary EG Cephei

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The Algol-like Near Contact Binary EG Cephei was observed in 2008 October. All of the available eclipse times, including 735 epochs, spanning more than 100 years were analyzed. A period oscillation with a period of 35.8 (+-0.1) yr and an amplitude of about 0.0037(+-0.0002)d was found, while undergoing a secular increase at a rate of dP/dt = 3.4 x 10e-8(+-0.1) d/yr. This continuous period increase may be caused by mass transfer from the secondary component to the primary one on a thermal timescale, which is consistent with the Algol-like semi-detached configuration of EG Cep. Combining with the spectroscopic and photometric results, we derived a conservative mass-transfer rate of this target, dM/dt=3.0(+-0.1)x10e-8 Mo/yr. The oscillation part of the period variation may be the result of a light-time effect due to the existence of a coplanar additional body with a mass of M3 = 0.11Mo, and a corresponding radius of a3 = 14AU. The Algol-like Near Contact Binary EG Cephei was observed in 2008 October. All of the available eclipse times, including 735 epochs, spanning more than 100 years were analyzed. A period oscillation with a period of 35.8 (+-0.1) yr and an amplitude of about 0.0037(+-0.0002)d was found, while undergoing a secular increase at a rate of dP/dt = 3.4 x 10e-8(+-0.1) d/yr. This continuous period increase may be caused by mass transfer from the secondary component to the primary one on a thermal timescale, which is consistent with the Algol-like semi-detached configuration of EG Cep. Combining with the spectroscopic and photometric results, we derived a conservative mass-transfer rate of this target, dM/dt=3.0(+-0.1)x10e-8 Mo/yr. The oscillation part of the period variation may be the result of a light-time effect due to the existence of a coplanar additional body with a mass of M3 = 0.11Mo, and a corresponding radius of a3 = 14AU. (en)
Title	New Period Investigation of Algol-like Near-Contact Binary EG Cephei New Period Investigation of Algol-like Near-Contact Binary EG Cephei (en)
skos:prefLabel	New Period Investigation of Algol-like Near-Contact Binary EG Cephei New Period Investigation of Algol-like Near-Contact Binary EG Cephei (en)
skos:notation	RIV/00216224:14310/09:00036125!RIV10-MSM-14310___
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(ME08038), S
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Zejda, Miloslav Mikulášek, Zdeněk Qian, Shengbang Zhu, Liying
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	329432
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/09:00036125
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	stars: binaries: eclipsing; stars: evolution; stars: individual (EG Cephei) (en)
http://linked.open.../riv/klicoveSlovo	stars: evolution stars: binaries: eclipsing stars: individual (EG Cephei)
http://linked.open...odStatuVydavatele	JP - Japonsko
http://linked.open...ontrolniKodProRIV	[FD4507EADD12]
http://linked.open...i/riv/nazevZdroje	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Photometric Study of Close Binary Stars on Special Evolutionary Stages
http://linked.open...UplatneniVysledku	2009
http://linked.open...v/svazekPeriodika	61
http://linked.open...iv/tvurceVysledku	Mikulášek, Zdeněk Zejda, Miloslav Qian, Shengbang Zhu, Liying Liao, WenPing
issn	0004-6264
number of pages	5 (xsd:int)
http://localhost/t...ganizacniJednotka	14310
is http://linked.open...avai/riv/vysledek of	New Period Investigation of Algol-like Near-Contact Binary EG Cephei New Period Investigation of Algol-like Near-Contact Binary EG Cephei New Period Investigation of Algol-like Near-Contact Binary EG Cephei New Period Investigation of Algol-like Near-Contact Binary EG Cephei

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