J/ApJS/210/25 Transit timing variation for 15 planetary pairs. II. (Xie, 2014)
Transit timing variation of near-resonance planetary pairs.
II. Confirmation of 30 planets in 15 multiple-planet systems.
Xie J.-W.
<Astrophys. J. Suppl. Ser., 210, 25 (2014)>
=2014ApJS..210...25X 2014ApJS..210...25X
ADC_Keywords: Planets ; Stars, double and multiple ; Photometry
Keywords: planetary systems; planets and satellites: detection;
planets and satellites: dynamical evolution and stability
Abstract:
Following on from Paper I (Cat. J/ApJS/208/22) in this series, I
report the confirmation of a further 30 planets in 15 multiple-planet
systems via transit timing variations (TTVs), using the publicly
available Kepler light curves (Q0-Q16). All 15 pairs are near
first-order mean motion resonances, showing sinusoidal TTVs consistent
with theoretically predicted periods, which demonstrate they are
orbiting and interacting in the same systems. Although individual
masses cannot be accurately extracted based only on TTVs (because of
the well known degeneracy between mass and eccentricity), the measured
TTV phases and amplitudes can still place relatively tight constraints
on their mass ratios and upper limits on their masses, which confirm
their planetary nature. Some of these systems (KOI-274, KOI-285,
KOI-370, and KOI-2672) are relatively bright and thus suitable for
further follow-up observations.
Description:
The data used in this paper are the long cadence (LC), "corrected"
light curves after the Pre-search Data Conditioning pipeline (PDC) of
Kepler Objects of Interest (KOIs) from Q0 to Q16, which are available
from the Multi-mission Archive at STScI (MAST).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 42 1519 Transit time measurements of the 30 (15 pairs)
newly confirmed planets
table2.dat 122 15 Results of TTV fitting for the 15 pairs of planets
table3.dat 166 15 Key properties of planets and stars of the 15 systems
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
J/ApJS/211/2 : Revised stellar properties of Q1-Q16 targets (Huber+, 2014)
J/ApJS/208/22 : Transit timing variation for 12 planetary pairs (Xie, 2013)
J/ApJS/208/16 : Kepler transit timing observations. VIII. (Mazeh+, 2013)
J/ApJS/204/24 : Kepler planetary candidates. III. (Batalha+, 2013)
J/A+A/555/A92 : Transit timing variations on Qatar-1 (von Essen+, 2013)
J/ApJ/750/114 : Kepler TTVs. IV. 4 multiple-planet systems (Fabrycky+, 2012)
J/ApJ/750/113 : Kepler TTVs. II. Confirmed multiplanet systems (Ford+, 2012)
J/MNRAS/421/2342 : 4 Kepler systems transit timing obs. (Steffen+, 2012)
J/ApJS/197/2 : Transit timing observations from Kepler. I. (Ford+, 2011)
http://exoplanetarchive.ipac.caltech.edu/ : NASA exoplanet archive home page
http://archive.stsci.edu/kepler/ : MAST Kepler home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [KOI]
5- 11 F7.2 --- KOI Kepler Object of Interest identifier
13- 15 I3 --- Ntr [11/128] Number of transits
17- 19 I3 --- n [-4/218] Transit sequence identifier
21- 32 F12.7 d t Barycentric Julian Date of transit time;
BJD-2454900
34- 42 F9.7 d e_t [0.0007/0.16] Uncertainty in t
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- Kepler Kepler pair identification (1)
8- 14 F7.2 --- KOI KOI name for the inner candidate
16- 22 F7.2 --- KOI' KOI name for the outer candidate
24 I1 --- j [2/5] j index (2)
26- 31 F6.3 --- Delta [-0.11/0.1] Proximity to resonance Δ (2)
33- 38 F6.1 d Pj [165/2235] TTV period (super-period) (2)
40- 45 F6.4 d Attv [0.001/0.06] TTV amplitude for the inner
candidate
47- 52 F6.4 d E_Attv Attv positive uncertainty
54- 59 F6.4 d e_Attv Attv negative uncertainty
61- 66 F6.4 d A'ttv [0.001/0.2] TTV amplitude for the outer
candidate
68- 73 F6.4 d E_A'ttv Att'v positive uncertainty
75- 80 F6.4 d e_A'ttv Att'v positive uncertainty
82- 87 F6.1 deg phi [-154/101] TTV phase φ for the inner
candidate
89- 92 F4.1 deg E_phi phi positive uncertainty
94- 97 F4.1 deg e_phi phi negative uncertainty
99-103 F5.1 deg phi' [29/227] TTV phase φ' for the outer
candidate
105-108 F4.1 deg E_phi' phi' positive uncertainty
110-113 F4.1 deg e_phi' phi' negative uncertainty
115 A1 --- l_FAP Limit flag on FAP
117-122 F6.4 --- FAP [0.0001/0.004] False Alarm Probability
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Note (1): Systems KOI-156 (Kepler 114) and KOI-1215 (Kepler 277) have also
been analyzed by Wu & Lithwick (2013ApJ...772...74W 2013ApJ...772...74W) using the TTV
data from Q0 to Q6.
Note (2): if P and P' are the orbital periods of the inner and outer
planets, the first-order Mean-Motion Resonance (MMR) is defined when
P'/P≃j/(j-1)j, j being an integer (j≥2). The proximity parameter
Δ is defined by Eq.2: Δ=(P'/P).((j-1)/j)-1.
The TTV (transit timing variations) period, or superperiod Pj, is
defined as Pj=P'/(j|Δ|)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Kepler Kepler pair identifier
8- 14 F7.2 --- KOI KOI id for the inner candidate
16- 22 F7.2 --- KOI' KOI id for the outer candidate
24- 29 F6.3 d P [5/43] Orbital period of the inner candidate (2)
31- 36 F6.3 d P' [8/89] Orbital period of the outer candidate (2)
38- 41 F4.2 Rgeo R [1.1/5.6] Radius of the inner candidate
43- 46 F4.2 Rgeo E_R [0.03/2.4] R positive uncertainty (3)
48- 51 F4.2 Rgeo e_R R negative uncertainty (3)
53- 56 F4.2 Rgeo R' [1.13/7.1] Radius of the outer candidate
58- 61 F4.2 Rgeo E_R' [0.03/4] R' positive uncertainty (3)
63- 66 F4.2 Rgeo e_R' R' negative uncertainty (3)
68- 72 F5.1 Mgeo Mnom [2/170] Nominal mass of the inner candidate
74- 77 F4.1 Mgeo E_Mnom [0.5/72] Mnom positive uncertainty
79- 82 F4.1 Mgeo e_Mnom Mnom negative uncertainty
84- 87 F4.1 Mgeo M'nom [1.5/80] Nominal mass of the outer candidate (4)
89- 92 F4.1 Mgeo E_M'nom [0.5/19] M'nom positive uncertainty (4)
94- 97 F4.1 Mgeo e_M'nom [0.4/17] M'nom negative uncertainty (4)
99-104 F6.1 Mgeo Mmax [22/4463] Inner candidate maximum mass (5)
106-111 F6.1 Mgeo M'max [22/1759] Outer candidate maximum mass (5)
113-116 F4.1 mag Kpmag [11.4/15.8] Kepler magnitude
118-121 F4.2 Msun M* [0.5/1.4] Stellar mass derived from logg and
R* (6)
123-126 F4.2 Msun E_M* [0.06/0.3] Positive error on M*
128-131 F4.2 Msun e_M* Negative error on M*
133-136 F4.2 [cm/s2] logg [4/4.8] Surface gravity (6)
138-141 F4.2 [cm/s2] E_logg Positive error on logg
143-146 F4.2 [cm/s2] e_logg Negative error on logg
148-151 F4.2 Rsun R* [0.5/1.9] Stellar radius (6)
153-156 F4.2 Rsun E_R* Positive error on R*
158-161 F4.2 Rsun e_R* Negative error on R*
163-166 F4.2 --- xi [0.5/1.7] Normalized transits duration ratio (7)
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Note (2): Their uncertainties are all less than 10-3 days.
Note (3): Their errorbars reflect the uncertainties of their transit lightcurve
fittings (i.e., Rp/R*) and stellar radii.
Note (4): Derived from Equation (8). Their errorbars reflect the uncertainties
of their TTV amplitudes and stellar masses.
Note (5): Defined as the 99.7% percentile of the posterior mass distribution
from the Monte Carlo fitting (Section 2.4).
Note (6): Stellar properties are adopted from the revised Q1-Q16 catalog (Huber
et al. 2014, Cat. J/ApJS/211/2), which are available at the NASA
exoplanet archive (http://exoplanetarchive.ipac.caltech.edu/).
Note (7): The normalized transits duration ratio,
ξ=(Tdur/T'dur)(P'/P)1/3
(Fabrycky et al. 2012arXiv1202.6328F 2012arXiv1202.6328F).
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History:
From electronic version of the journal
References:
Xie J.-W. Paper I. 2013ApJS..208...22X 2013ApJS..208...22X Cat. J/ApJS/208/22
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 02-Apr-2014