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  KIC 4247791: a SB4 system with two eclipsing binaries (2EBs) A quadruple system?

Lehmann, H., Zechmeister, M., Dreizler, S., Schuh, S., & Kanzler, R. (2012). KIC 4247791: a SB4 system with two eclipsing binaries (2EBs) A quadruple system? Astronomy and Astrophysics, 541: A105. doi:10.1051/0004-6361/201118298.

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Genre: Journal Article
Other : KIC 4247791: a SB4 system with two eclipsing binaries (2EBs): A quadruple system?

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 Creators:
Lehmann, H., Author
Zechmeister, M., Author
Dreizler, S., Author
Schuh, Sonja1, Author              
Kanzler, R., Author
Affiliations:
1External Organizations, ou_persistent22              

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Free keywords: binaries: eclipsing / binaries: spectroscopic / stars: fundamental parameters
 Abstract: Context. KIC 4247791 is an eclipsing binary observed by the Kepler satellite mission. Aims. We wish to determine the nature of its components and in particular the origin of a shallow dip in its Kepler light curve that previous investigations have been unable to explain in a unique way. Methods. We analyse newly obtained high-resolution spectra of the star using synthetic spectra based on atmosphere models, derive the radial velocities of the stellar components from cross-correlation with a synthetic template, and calculate the orbital solution. We use the JKTEBOP program to model the Kepler light curve of KIC 4247791. Results. We find KIC 4247791 to be a SB4 star. The radial velocity variations of its four components can be explained by two separate eclipsing binaries. In contradiction to previous photometric findings, we show that the observed composite spectrum as well as the derived masses of all four of its components correspond to spectral type F. Conclusions. The observed small dip in the light curve is not caused by a transit-like phenomenon but by the eclipses of the second binary system. We find evidence that KIC 4247791 might belong to the very rare hierarchical SB4 systems with two eclipsing binaries.

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Language(s): eng - English
 Dates: 2012
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1051/0004-6361/201118298
arXiv: 1202.6552
Other: 2012A%26A...541A.105L
 Degree: -

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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Les Ulis Cedex A France : EDP Sciences
Pages: - Volume / Issue: 541 Sequence Number: A105 Start / End Page: - Identifier: Other: 1432-0746
ISSN: 0004-6361
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1