%0 Generic %1 chen2017rapid %A Chen, Wen-Cong %A Podsiadlowski, Philipp %D 2017 %K multiplicity %T Rapid orbital decay in detached binaries: evidence for circumbinary disks %U http://arxiv.org/abs/1702.06311 %X Some short-period, detached binary systems have recently been reported to experience very rapid orbital decay, much faster than is expected from the angular-momentum loss caused by gravitational radiation alone. As these systems contain fully convective stars, magnetic braking is not believed to be operative, making the large orbital-period derivative puzzling. Here we explore whether a resonant interaction between the binary and a surrounding circumbinary (CB) disk could account for the observed orbital decay. Our calculations indicate that the observed orbital-period derivatives in seven detached binaries can be produced by the resonant interaction between the binary and a CB disk if the latter has a mass in the range of $10^-4-10^-2~ M_ødot$, which is of the same order as the inferred disk mass ($\sim2.410^-4~ M_ødot$) in the post-common-envelope binary NN Ser.

@misc{chen2017rapid, abstract = {Some short-period, detached binary systems have recently been reported to experience very rapid orbital decay, much faster than is expected from the angular-momentum loss caused by gravitational radiation alone. As these systems contain fully convective stars, magnetic braking is not believed to be operative, making the large orbital-period derivative puzzling. Here we explore whether a resonant interaction between the binary and a surrounding circumbinary (CB) disk could account for the observed orbital decay. Our calculations indicate that the observed orbital-period derivatives in seven detached binaries can be produced by the resonant interaction between the binary and a CB disk if the latter has a mass in the range of $10^{-4}-10^{-2}~ M_{\odot}$, which is of the same order as the inferred disk mass ($\sim2.4\times 10^{-4}~ M_{\odot}$) in the post-common-envelope binary NN Ser.}, added-at = {2017-02-24T21:05:08.000+0100}, author = {Chen, Wen-Cong and Podsiadlowski, Philipp}, biburl = {https://www.bibsonomy.org/bibtex/2d939161a5571585e5ece66b9ecf1e33d/superjenwinters}, description = {Rapid orbital decay in detached binaries: evidence for circumbinary disks}, interhash = {d413a4a69154f16a6584b5816a02eee4}, intrahash = {d939161a5571585e5ece66b9ecf1e33d}, keywords = {multiplicity}, note = {cite arxiv:1702.06311Comment: 5 pages, 1 figure, accepted for publication in ApJ Letters}, timestamp = {2017-02-24T21:05:08.000+0100}, title = {Rapid orbital decay in detached binaries: evidence for circumbinary disks}, url = {http://arxiv.org/abs/1702.06311}, year = 2017 }