Discovery of radial velocity variable post-AGB stars from the MUCHFUSS project

¹ Institute for Astronomy and Astrophysics, Kepler Center for Astro and Particle Physics, Eberhard Karls University, Sand 1, 72076 Tübingen, Germany
² European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching, Germany
³ Dr. Karl Remeis-Observatory & ECAP, Astronomical Institute, Friedrich-Alexander University Erlangen-Nuremberg, Sternwartstr. 7, 96049 Bamberg, Germany
⁴ Department of Astrophysics/IMAPP, Radboud University Nijmegen, PO Box 9010, 6500 GL Nijmegen, The Netherlands
⁵ Institute for Astro- and Particle Physics, University of Innsbruck, Technikerstr. 25/8, 6020 Innsbruck, Austria
⁶ Department of Physics, High Point University, 833 Montlieu Avenue, High Point, NC 27262, USA
⁷ Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Heverlee, Belgium

Abstract

In the course of the MUCHFUSS project we have discovered five radial velocity (RV) post-AGB stars. Among them, we found the first known RV variable O(He) star, the only second known RV variable PG 1159 close binary candidate and three RV variable, H-rich post-AGB stars of O(H)-type.