Discovery of a double eclipsing binary with periods near a 3:2 ratio

Cagaš, P.; Pejcha, Ondřej

doi:10.1051/0004-6361/201219815

Cited by 27 publications

(31 citation statements)

References 42 publications

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“…The higher efficiency of quadruple KL cycles might give important constraints on the future evolution of the known quadruple systems such as those investigated by Tokovinin et al (2003) and Harmanec et al (2007). Explaining the nearly 3:2 period ratios of some close double eclipsing binaries (Cagaš & Pejcha 2012;Kołaczkowski et al 2013) will require understanding the quadruple dynamics near mean-motion resonance together with tidal effects.…”

Section: Discussionmentioning

confidence: 99%

Greatly enhanced eccentricity oscillations in quadruple systems composed of two binaries: implications for stars, planets and transients

Pejcha

Antognini

Shappee

et al. 2013

Monthly Notices of the Royal Astronomical Society

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We study the orbital evolution of hierarchical quadruple systems composed of two binaries on a long mutual orbit, where each binary acts as a Kozai-Lidov (KL) perturber on the other. We find that the coupling between the two binaries qualitatively changes the behavior of their KL cycles. The binaries can experience coherent eccentricity oscillations as well as excursions to very high eccentricity that occur over a much larger fraction of the parameter space than in triple systems. For a ratio of outer to inner semi-major axes of 10 to 20, about 30 to 50% of equal-mass quadruples reach eccentricity 1 − e < 10 −3 in one of the binaries. This is about 4 to 12 times more than for triples with equivalent parameters. Orbital "flips" and collisions without previous tidal interaction are similarly enhanced in quadruples relative to triples. We argue that the frequency of evolutionary paths influenced by KL cycles is comparable in the triple and quadruple populations even though field quadruples are a factor of ∼ 5 less frequent than triples. Additionally, quadruples might be a non-negligible source of triples and provide fundamentally new evolutionary outcomes involving close binaries, mergers, collisions, and associated transients, which occur without any fine tuning of parameters. Finally, we study the perturbations to a planetary orbit due to a distant binary and we find that the fraction of orbital flips is a factor of 3 to 4 higher than for the corresponding triple system given our fiducial parameters with implications for hot Jupiters and star-planet collisions.

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Section: Discussionmentioning

confidence: 99%

Greatly enhanced eccentricity oscillations in quadruple systems composed of two binaries: implications for stars, planets and transients

Pejcha

Antognini

Shappee

et al. 2013

Monthly Notices of the Royal Astronomical Society

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“…The only plausible interpretation is that both subsystems are in a MMR with the outer orbit. For example, Cagas & Pejcha (2012) found a doubly eclipsing quadruple system (J05484+3057) with periods of 1.20937 and 0.80693 days, in a 3:2 ratio. A similar situation occurs in the massive quadruple system HD 5980, where the inner eclipsing binary has a period of 19.266 days, while its tertiary component is itself a pair with a period of 96.56 days, exactly 5 times longer (Koenigsberger et al 2014).…”

Section: Planar Systems and Resonancesmentioning

confidence: 99%

The Updated Multiple Star Catalog

Tokovinin

2018

ApJS

157

120

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The catalog of hierarchical stellar systems with three or more components is an update of the original 1997 version of the MSC. For two thousand hierarchies, the new MSC provides distances, component's masses and periods, as well as supplementary information (astrometry, photometry, identifiers, orbits, notes). The MSC content and format are explained, its incompleteness and strong observational selection are stressed. Nevertheless, the MSC can be used for statistical studies and it is a valuable source for planning observations of multiple stars. Rare classes of stellar hierarchies found in the MSC (with 6 or 7 components, extremely eccentric orbits, planar and possibly resonant orbits, hosting planets) are briefly presented. High-order hierarchies have smaller velocity dispersion compared to triples and are often associated with moving groups. The paper concludes by the analysis of the ratio of periods and separations between inner and outer subsystems. In wide hierarchies, the ratio of semimajor axes, estimated statistically, is distributed between 3 and 300, with no evidence of dynamically unstable systems.

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“…For example, Pawlak et al (2013) listed 15 new potential double eclipsing systems in the SMC. In addition, Cagaš & Pejcha (2012) and Lohr et al (2013) announced the discovery of new interesting double eclipsing systems. However, a similar study of the period changes for their new discovered systems is still difficult because we lack data spanning a longer time interval.…”

Section: Inconsistency Of Our Original Solution For V994 Hermentioning

confidence: 99%

Updated study of the quintuple system V994 Herculis

Zasche

Uhlàř²

2016

A&A

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Aims. We present a new updated study of the unique quintuple system of two eclipsing binaries, V994 Her. Methods. Based on new obtained photometric observations, we analysed the period variations of the two eclipsing pairs of V994 Her. Results. We found that the orbital period of the two eclipsing binaries around a common barycenter is about 2.9 yrs instead of the original period, which was reported as 6.3 yrs. Moreover, the system now seems to be close to coplanar (i ≈ 84• ), and we also revised the individual masses of all four eclipsing components. The two eclipsing pairs show slow apsidal motion with periods of about 116 and 111 yrs, respectively. Pairs A and B are distant by about 17 mas on the sky, which is encouraging for observers because an interferometric detection may be possible in the next years. Conclusions. All of these results are based on the photometric observations of V994 Her and its detailed analysis of the period changes of the two eclipsing binaries.

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Discovery of a double eclipsing binary with periods near a 3:2 ratio

Cited by 27 publications

References 42 publications

Greatly enhanced eccentricity oscillations in quadruple systems composed of two binaries: implications for stars, planets and transients

Greatly enhanced eccentricity oscillations in quadruple systems composed of two binaries: implications for stars, planets and transients

The Updated Multiple Star Catalog

Updated study of the quintuple system V994 Herculis

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