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Title: The architecture of the hierarchical triple star KOI 928 from eclipse timing variations seen in Kepler photometry

We present a hierarchical triple star system (KIC 9140402) where a low mass eclipsing binary orbits a more massive third star. The orbital period of the binary (4.98829 Days) is determined by the eclipse times seen in photometry from NASA's Kepler spacecraft. The periodically changing tidal field, due to the eccentric orbit of the binary about the tertiary, causes a change in the orbital period of the binary. The resulting eclipse timing variations provide insight into the dynamics and architecture of this system and allow the inference of the total mass of the binary (0.424±0.017Mcircle-dot) and the orbital parameters of the binary about the central star.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [3] ;  [5] ;  [4] ;  [4] ;  [6] ;  [7] ;  [2] ;  [8]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  3. NASA Ames Research Center (ARC), Moffett Field, Mountain View, CA (United States)
  4. Univ. of Texas, Austin, TX (United States). McDonald Observatory
  5. Univ. of Copenhagen (Denmark). The Niels Bohr Inst.
  6. Univ. of California, Santa Cruz, CA (United States). Dept. of Astronomy and Astrophysics
  7. Univ. of Florida, Gainesville, FL (United States). Bryant Space Science Center
  8. NASA Ames Research Center (ARC), Moffett Field, Mountain View, CA (United States); SETI Inst., Mountain View, CA (United States)
Publication Date:
OSTI Identifier:
1018354
Report Number(s):
FERMILAB-PUB--11-292-AE
Journal ID: ISSN 1745-3925; arXiv eprint number arXiv:1106.4530; TRN: US201113%%815
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society: Letters
Additional Journal Information:
Journal Volume: 417; Journal Issue: 1; Journal ID: ISSN 1745-3925
Publisher:
Royal Astronomical Society
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; ECLIPSE; PHOTOMETRY; STARS ASTROPHYSICS