Hessman, F. V., Beuermann, K., Dreizler, S. et al. (10 more authors) (2011) The Planets around the Post-Common Envelope Binary NN Serpentis. AIP Conference Proceedings, 1331. pp. 281-286. ISSN 0094-243X
Abstract
We have detected 2 circumbinary planets around the close binary system NN Serpentis using the orbital time delay effect measured via the sharp eclipses of the white dwarf primary. The present pre-cataclysmic binary was formed when the original - 2 M primary expanded into a red giant, causing the secondary star to drop from its original orbit at a separation of about 1.4 A.U. down to its current separation at 0.0043 A.U. A quasi-adiabatic evolution of the circumbinary planets' orbits during the common-envelope phase would have placed them in unstable configurations, suggesting that they may have suffered significant orbital drag effects and were originally in much larger orbits. Alternatively, they may have been created as 2nd-generation planets during the last million years from the substantial amount of material lost during the creation of the binary, making them the youngest planets known. Either solution shows how little we actually understand about planetary formation.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2011 American Institute of Physics, AIP Publishing. This is an author produced version of a paper subsequently published in AIP Conference Proceedings. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | astro-ph.EP; astro-ph.EP; Spectroscopic binaries; close binaries – Substellar companions; planets – Extrasolar planetary systems |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 30 Nov 2016 16:17 |
Last Modified: | 28 Mar 2018 22:14 |
Published Version: | http://dx.doi.org/10.1063/1.3570986 |
Status: | Published |
Publisher: | AIP Publishing |
Refereed: | Yes |
Identification Number: | 10.1063/1.3570986 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:108485 |