The DWARF project: Eclipsing binaries - precise clocks to discover exoplanets
Abstract
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 ~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 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 project is long, at least 5-10 years. The paper gives simple formulas to estimate 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 presence of circumbinary planets. First test observation of the selected targets are presented.
Cite
@article{arxiv.1206.6709,
title = {The DWARF project: Eclipsing binaries - precise clocks to discover exoplanets},
author = {T. Pribulla and M. Vaňko and M. Ammler - von Eiff and M. Andreev and A. Aslantürk and N. Awadalla and D. Baluďanský and A. Bonanno and H. Božić and G. Catanzaro and L. Çelik and P. E. Christopoulou and E. Covino and F. Cusano and D. Dimitrov and P. Dubovský and E. M. Esmer and A. Frasca and Ľ. Hambálek and M. Hanna and A. Hanslmeier and B. Kalomeni and D. P. Kjurkchieva and V. Krushevska and I. Kudzej and E. Kundra and Yu. Kuznyetsova and J. W. Lee and M. Leitzinger and G. Maciejewski and D. Moldovan and M. H. M. Morais and M. Mugrauer and R. Neuhäuser and A. Niedzielski and P. Odert and J. Ohlert and İ. Özavcı and A. Papageorgiou and Š. Parimucha and S. Poddaný and A. Pop and M. Raetz and S. Raetz and Ya. Romanyuk and D. Ruždjak and J. Schulz and H. V. Şenavcı and T. Szalai and P. Székely and D. Sudar and C. T. Tezcan and M. E. Törün and V. Turcu and O. Vince and M. Zejda},
journal= {arXiv preprint arXiv:1206.6709},
year = {2016}
}
Comments
12 pages, 2 figures, submitted to Astron. Nachrichten