Alexander Mustill
Researcher
Main-sequence progenitor configurations of the NN Ser candidate circumbinary planetary system are dynamically unstable
Author
Summary, in English
Recent observations of the NN Serpentis post-common envelope binary system have revealed eclipse timing variations that have been attributed to the presence of two Jovian-mass exo-planets. Under the assumption that these planets are real and survived from the binary's main-sequence state, we reconstruct initial binaries that give rise to the present NN Ser configuration and test the dynamical stability of the original system. Under standard assumptions about binary evolution, we find that survival of the planets through the entire main-sequence lifetime is very unlikely. Hence, we conclude that the planets are not survivors from before the common envelope phase, implying that either they formed recently out of material ejected from the primary or that the observed signals are of non-planetary origin.
Publishing year
2013
Language
English
Pages
2515-2521
Publication/Series
Monthly Notices of the Royal Astronomical Society
Volume
436
Issue
3
Document type
Journal article
Publisher
Oxford University Press
Topic
- Physical Sciences
- Astronomy, Astrophysics and Cosmology
Keywords
- Astrophysics - Earth and Planetary Astrophysics
- Astrophysics - Solar and Stellar Astrophysics
- binaries: close
- planetary systems
- planets and satellites: dynamical evolution and stability
- stars: individual: NN Ser
Status
Published
ISBN/ISSN/Other
- ISSN: 1365-2966