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

• Autoři: 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
• Rok publikování: 2012
• Druh: Článek v odborném periodiku
• Časopis / Zdroj: Astronomische Nachrichten
• Fakulta / Pracoviště MU: Přírodovědecká fakulta
• Doi: http://dx.doi.org/10.1002/asna.201211722
• Obor: Astronomie a nebeská mechanika, astrofyzika
• Klíčová slova: eclipsing binaries; planetary systems; photometry
• Popis: 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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