Orbital period changes and photometric study of contact binary system AK Her

A. Samadi; D. M. Z. Jassur; S. Nassiri; G. Gozaliasl; M. H. Kermani; A. Zareie

doi:10.1016/j.newast.2009.09.007

Orbital period changes and photometric study of contact binary system AK Her

A. Samadi, D. M. Z. Jassur, S. Nassiri, G. Gozaliasl, M. H. Kermani, A. Zareie

Not published at Aalto University

Research output: Contribution to journal › Article › Scientific › peer-review

Abstract

UBV photometry of the W UMa type eclipsing binary AK Her is presented. Light curves analysis were carried out using W-D code to obtain physical parameters of both components. The updated O-C diagram analysis yielded the values of P=62.61±0.01 years, P=25.05±0.01 years and P=13.91±0.01 years as the modulation periodicities and the values of 2.01×10-8±2.1×10-9 days, 8.9×10-9±2.1×10-9 days and 8.3×10-9±2.1×10-9 days as amplitude of orbital period modulation respectively. The consequences of these period changes are discussed on the basis of third body and magnetic activity.

Original language	English
Pages (from-to)	339-342
Journal	New Astronomy
Volume	15
Issue number	4
DOIs	https://doi.org/10.1016/j.newast.2009.09.007
Publication status	Published - 1 Apr 2010
MoE publication type	A1 Journal article-refereed

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10.1016/j.newast.2009.09.007

http://adsabs.harvard.edu/abs/2010NewA...15..339S

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title = "Orbital period changes and photometric study of contact binary system AK Her",

abstract = "UBV photometry of the W UMa type eclipsing binary AK Her is presented. Light curves analysis were carried out using W-D code to obtain physical parameters of both components. The updated O-C diagram analysis yielded the values of P=62.61±0.01 years, P=25.05±0.01 years and P=13.91±0.01 years as the modulation periodicities and the values of 2.01×10-8±2.1×10-9 days, 8.9×10-9±2.1×10-9 days and 8.3×10-9±2.1×10-9 days as amplitude of orbital period modulation respectively. The consequences of these period changes are discussed on the basis of third body and magnetic activity.",

author = "A. Samadi and Jassur, {D. M. Z.} and S. Nassiri and G. Gozaliasl and Kermani, {M. H.} and A. Zareie",

year = "2010",

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doi = "10.1016/j.newast.2009.09.007",

language = "English",

volume = "15",

pages = "339--342",

journal = "New Astronomy",

issn = "1384-1076",

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TY - JOUR

T1 - Orbital period changes and photometric study of contact binary system AK Her

AU - Samadi, A.

AU - Jassur, D. M. Z.

AU - Nassiri, S.

AU - Gozaliasl, G.

AU - Kermani, M. H.

AU - Zareie, A.

PY - 2010/4/1

Y1 - 2010/4/1

N2 - UBV photometry of the W UMa type eclipsing binary AK Her is presented. Light curves analysis were carried out using W-D code to obtain physical parameters of both components. The updated O-C diagram analysis yielded the values of P=62.61±0.01 years, P=25.05±0.01 years and P=13.91±0.01 years as the modulation periodicities and the values of 2.01×10-8±2.1×10-9 days, 8.9×10-9±2.1×10-9 days and 8.3×10-9±2.1×10-9 days as amplitude of orbital period modulation respectively. The consequences of these period changes are discussed on the basis of third body and magnetic activity.

AB - UBV photometry of the W UMa type eclipsing binary AK Her is presented. Light curves analysis were carried out using W-D code to obtain physical parameters of both components. The updated O-C diagram analysis yielded the values of P=62.61±0.01 years, P=25.05±0.01 years and P=13.91±0.01 years as the modulation periodicities and the values of 2.01×10-8±2.1×10-9 days, 8.9×10-9±2.1×10-9 days and 8.3×10-9±2.1×10-9 days as amplitude of orbital period modulation respectively. The consequences of these period changes are discussed on the basis of third body and magnetic activity.

U2 - 10.1016/j.newast.2009.09.007

DO - 10.1016/j.newast.2009.09.007

M3 - Article

SN - 1384-1076

VL - 15

SP - 339

EP - 342

JO - New Astronomy

JF - New Astronomy

IS - 4

ER -

Orbital period changes and photometric study of contact binary system AK Her

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