The Dwarf project: Eclipsing binaries - precise clocks to discover exoplanets

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Authors

PRIBULLA Theo VAŇKO Martin AMMLER-VON EIFF M. ANDREEV M. ASLANTURK A. AWADALLA N. BALUĎANSKÝ Daniel BONANNO A. BOZIC Hrvoje CATANZARO G. CELIK L. CHRISTOPOULOU P. E. COVINO E. CUSANO F. DIMITROV D. DUBOVSKÝ Peter EIGMUELLER P. ESMER E. M. FRASCA A. HAMBÁLEK L. HANNA M. HANSLMEIER A. KALOMENI B. KJURKCHIEVA D. P. KRUSHEVSKA V. KUDZEJ Igor KUNDRA Emil KUZNYETSOVA Yu. LEE Jae Woo LEITZINGER M. MACIEJEWSKI G. MOLDOVAN D. MORAIS M. H. M. MUGRAUER M. NEUHAEUSER R. NIEDZIELSKI A. ODERT P. OHLERT J. OZAVCI I. PAPAGEORGIOU A. PARIMUCHA Štefan PODDANÝ Stanislav POP A. RAETZ M. RAETZ S. ROMANYUK Ya. RUZDJAK D. SCHULZ J. SENAVCI H. V. SRDOC G. SZALAI T. SZEKELY P. SUDAR D. TEZCAN C. T. TORUN M. E. TURCU V. VINCE O. ZEJDA Miloslav

Year of publication 2012
Type Article in Periodical
Magazine / Source Astronomische Nachrichten
MU Faculty or unit

Faculty of Science

Citation
Doi http://dx.doi.org/10.1002/asna.201211722
Field Astronomy and astrophysics
Keywords eclipsing binaries; planetary systems; photometry
Description We present a new observational campaign, Dwarf, aimed at detection of circumbinary extrasolar planets using the timing of the minima of low-mass eclipsing binaries. The observations will be performed within an extensive network of relatively small to medium-size telescopes with apertures of similar to 20-200 cm. The starting sample of the objects to be monitored contains (i) low-mass eclipsing binaries with M and K components, (ii) short-period binaries with a sdB or sdO component, and (iii) post-common-envelope systems containing a WD, which enable to determine minima with high precision. Since the amplitude of the timing signal increases with the orbital period of an invisible third component, the timescale of the project is long, at least 5-10 years. The paper gives simple formulas to estimate the suitability of individual eclipsing binaries for the circumbinary planet detection. Intrinsic variability of the binaries (photospheric spots, flares, pulsation etc.) limiting the accuracy of the minima timing is also discussed. The manuscript also describes the best observing strategy and methods to detect cyclic timing variability in the minima times indicating the presence of circumbinary planets. First test observations of the selected targets are presented ((c) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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