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The planets around the post-common envelope binary NN Serpentis
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Hessman, Frederic V., Beuermann, K., Dreizler, S., Marsh, T. R., Parsons, S. G., Copperwheat, C. M., Winget, Donald Earl, Miller, G. F., Hermes, J. J., Schreiber, Matthias R., Kley, W., Dhillon, V. S. and Littlefair, S. P. (2011) The planets around the post-common envelope binary NN Serpentis. In: Planetary Systems Beyond the Main Sequence. Published in: AIP Conference Proceedings, Vol.1331 (No.1). pp. 281-286. doi:10.1063/1.3556212 ISSN 0094-243X.
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Official URL: http://dx.doi.org/10.1063/1.3556212
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. ©2011 American Institute of Physics
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Eclipses, White dwarf stars, Extrasolar planets, Stellar winds | ||||
| Journal or Publication Title: | AIP Conference Proceedings | ||||
| Publisher: | American Institute of Physics | ||||
| ISSN: | 0094-243X | ||||
| Official Date: | 10 March 2011 | ||||
| Dates: |
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| Volume: | Vol.1331 | ||||
| Number: | No.1 | ||||
| Page Range: | pp. 281-286 | ||||
| DOI: | 10.1063/1.3556212 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | Planetary Systems Beyond the Main Sequence | ||||
| Type of Event: | Conference | ||||
| Related URLs: |
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