J/A+A/624/A15 Kepler-411 mid-transit times (Sun+, 2019)
Kepler-411: a four-planet system with an active host star.
Sun L., Ioannidis P., Gu S.G., Schmitt J.H.M.M., Wang X.B.,
Kouwenhoven M.B.N.
<Astron. Astrophys. 624, A15 (2019)>
=2019A&A...624A..15S 2019A&A...624A..15S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets
Keywords: planets and satellites: dynamical evolution and stability -
stars: activity - planetary systems - starspots
Abstract:
We present a detailed characterization of the Kepler-411 system (KOI
1781). This system was previously known to host two transiting
planets: one with a period of 3 days (R=2.4R⊕; Kepler-411b)
and one with a period of 7.8days (R=4.4R⊕; Kepler-411c), as
well as a transiting planetary candidate with a 58-day period
(R=3.3R⊕; KOI 1781.03) from Kepler photometry. Here, we
combine Kepler photometry data and new transit timing variation (TTV)
measurements from all the Kepler quarters with previous
adaptive-optics imaging results, and dynamical simulations, in order
to constrain the properties of the Kepler-411 system. From our
analysis, we obtain masses of 25.6±2.6M⊕ for Kepler-411b and
26.4±5.9M⊕ for Kepler-411c, and we confirm the planetary
nature of KOI 1781.03 with a mass of 15.2±5.1M⊕, hence the
name Kepler-411d. Furthermore, by assuming near-coplanarity of the
system (mutual inclination below 30°), we discover a nontransiting
planet, Kepler-411e, with a mass of 10.8±1.1M⊕ on a 31.5-day
orbit, which has a strong dynamical interaction with Kepler-411d. With
densities of 1.71±0.39g/cm3 and 2.32±0.83g/cm3, both
Kepler-411c and Kepler-411d belong to the group of planets with a
massive core and a significant fraction of volatiles. Although
Kepler-411b has a sub-Neptune size, it belongs to the group of rocky
planets.
Description:
The Kepler data of Kepler-411 were downloaded from the MAST archive
(https://archive.stsci.edu/kepler), which contains the data recorded
in the 17 quarters; we use both long- and short-cadence data
(available for quarters Q10 to Q17). We use the PDCSAP data for our
analysis.
Objects:
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RA (2000) DE Designation(s)
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19 10 25.35 +49 31 23.7 Kepler-411 = KIC 11551692 = KOI-1781
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 49 17 The mid-transit times of the transit events
of Kepler-411 d
table3.dat 49 314 The mid-transit times of the transit events of
Kepler-411 b
table4.dat 49 131 The mid-transit times of the transit events of
Kepler-411 c
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Byte-by-byte Description of file: table2.dat table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Cycle Orbital cycle
4- 5 A2 --- n_Cycle [odft ] Note on Cyle (1)
12- 22 F11.6 d Date Date (BJD-2454833, TDB)
27- 34 F8.6 d e_Date Uncertainty on Date
41- 49 F9.6 d (O-C) Observed minus computed
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Note (1): Notes as follows:
d = This transit is a double-transit event
f = This transit is selected to construct the fiducial model
o = One-spot model is used when the transit time is measured
t = Two-spot model is used when the transit time is measured
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Acknowledgements:
Leilei Sun, sunleilei(at)ynao.ac.cn
(End) Patricia Vannier [CDS] 25-Feb-2019