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Statements

Subject Item
n2:RIV%2F00216224%3A14310%2F09%3A00036125%21RIV10-MSM-14310___
rdf:type
skos:Concept n17:Vysledek
dcterms: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.
dcterms:title
New Period Investigation of Algol-like Near-Contact Binary EG Cephei New Period Investigation of Algol-like Near-Contact Binary EG Cephei
skos:prefLabel
New Period Investigation of Algol-like Near-Contact Binary EG Cephei New Period Investigation of Algol-like Near-Contact Binary EG Cephei
skos:notation
RIV/00216224:14310/09:00036125!RIV10-MSM-14310___
n3:aktivita
n16:S n16:P
n3:aktivity
P(ME08038), S
n3:cisloPeriodika
3
n3:dodaniDat
n11:2010
n3:domaciTvurceVysledku
n9:4156722 Zhu, Liying Qian, Shengbang n9:3939383
n3:druhVysledku
n18:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n13:predkladatel
n3:idSjednocenehoVysledku
329432
n3:idVysledku
RIV/00216224:14310/09:00036125
n3:jazykVysledku
n8:eng
n3:klicovaSlova
stars: binaries: eclipsing; stars: evolution; stars: individual (EG Cephei)
n3:klicoveSlovo
n7:stars%3A%20evolution n7:stars%3A%20binaries%3A%20eclipsing n7:stars%3A%20individual%20%28EG%20Cephei%29
n3:kodStatuVydavatele
JP - Japonsko
n3:kontrolniKodProRIV
[FD4507EADD12]
n3:nazevZdroje
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
n3:obor
n4:BN
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
5
n3:projekt
n15:ME08038
n3:rokUplatneniVysledku
n11:2009
n3:svazekPeriodika
61
n3:tvurceVysledku
Qian, Shengbang Liao, WenPing Zejda, Miloslav Zhu, Liying Mikulášek, Zdeněk
s:issn
0004-6264
s:numberOfPages
5
n10:organizacniJednotka
14310