The quest for companions to post-common envelope binaries. III (Beuermann et al.)

Vol. 543
In section 7. Stellar structure and evolution

The quest for companions to post-common envelope binaries. III. A reexamination of HW Virginis

by K. Beuermann, S. Dreizler, F. V. Hessman, and J. Deller, A&A 543, A138

alt

The discovery of planets that orbit pre-white dwarfs in eclipsing binaries raises interesting questions concerning the survival of these low-mass objects. One can even speculate about planet formation in very late phases of stellar evolution. HW Vir is the prototype of this class of binaries with orbiting planets. The authors of this article found that the previously published orbital solution is unstable and incompatible with recent eclipse timings. A new stable solution is presented that fits the new data and leads to a substantial upward revision of the mass of one of the planet candidates.