J/A+A/628/A108 Photometry of Kepler-82b and c transits (Freudenthal+, 2019)
Kepler Object of Interest Network. III. Kepler-82f: a new non-transiting
21 Mearth planet from photodynamical modelling.
Freudenthal J., von Essen C., Ofir A., Dreizler S., Agol E., Wedemeyer S.,
Morris B.M., Becker A.C., Deeg H.J., Hoyer S., Mallonn M., Poppenhaeger K.,
Herrero E., Ribas I., Boumis P., Liakos A.
<Astron. Astrophys. 628, A108 (2019)>
=2019A&A...628A.108F 2019A&A...628A.108F (SIMBAD/NED BibCode)
ADC_Keywords: Stars, standard ; Stars, double and multiple ; Exoplanets ;
Photometry
Keywords: planets and satellites: dynamical evolution and stability -
planets and satellites: detection - methods: data analysis -
techniques: photometric - stars: individual: Kepler-82 -
stars: fundamental parameters
Abstract:
From the Kepler mission four planets were detected and confirmed in
the Kepler-82 system. The two inner ones (d and e) show no transit
timing variations (TTVs) and are dynamically independent from the two
outer ones (b and c), which are showing TTVs. A dynamical analysis of
the Kepler-82b/c system delivered a very high, hardly to explain,
density ratio of about ten between the planets. A chopping component
in the TTVs of the outer planet (Kepler-82b) is not explained by the
two-planet model. This chopping component hints on another outer
planet near the 3:2 or 3:1 resonance to planet c. The time span of
Kepler observations are too short for distinguishing between the two
models, the dynamical cycle is not fully covered. The completion of
the dynamical cycle of this and other Kepler Objects of Interest
(KOIs) showing TTVs is the aim of the KOINet. Within the network
follow-up observations with ground-based telescopes are organized.
These follow-up observations of Kepler-82b/c transits helped to
distinguish between the two models, resulting is the detection of a
new planet near the 3:2 resonance to Kepler-82d in the system. A
detailed photodynamical modelling of the system was carried out to
fully characterise the system parameters. The inclusion of the new
planet also lead to a more reasonable density ratio of planet b to c
of about two.
Description:
All our observations were carried out using R-band filter. We provide
the differential photometry with varying reference stars for each
observation together with the used detrending components. We measured
one Kepler-82b and two Kepler-82c transits in three observations
between 2014 and 2018.
Objects:
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RA (2000) DE Designation(s)
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19 31 29.6 +42 57 58 Kepler-82 = KOI-880 = KIC 7366258
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 29 3 List of light curves
b1arc.dat 295 235 Light curve 1 of Kepler-82b
c1not.dat 110 111 Light curve 1 of Kepler-82c
c2not.dat 262 112 Light curve 2 of Kepler-82c
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See also:
J/A+A/615/A79 : KOINet. Study of exoplanet systems via TTVs (von Essen+, 2018)
J/A+A/618/A41 : Photometry of Kepler-9b and c transits (Freudenthal+, 2018)
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 "date" Obs.Date Observation date
12 A1 --- Planet [bc] Planet letter
14- 16 A3 --- Tel Telescope used (1)
19- 29 A11 --- FileName Name of the light curve file
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Note (1): Telescope used as follows:
ARC = 3.5m Astrophysical Research Consortium telescope at the Apache Point
Observatory, United States of America
NOT = 2.5m Nordic Optical Telescope at Observatorio Roque de los Muchachos,
Spain
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Byte-by-byte Description of file: b1arc.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 F16.8 d BJD Barycentric Julian date in barycentric
dynamical time
18- 25 F8.6 --- Flux Raw flux
27- 34 F8.6 --- e_Flux Flux error scaled by the standard deviation
and the β value
36- 38 F3.1 --- DT1 Detrending component 1 (offset)
40- 47 F8.5 --- DT2 Detrending component 2
49- 56 F8.4 --- DT3 Detrending component 3
58- 65 F8.4 --- DT4 Detrending component 4
67- 74 F8.4 --- DT5 Detrending component 5
76- 83 F8.4 --- DT6 Detrending component 6
85- 92 F8.4 --- DT7 Detrending component 7
94-101 F8.4 --- DT8 Detrending component 8
103-110 F8.4 --- DT9 Detrending component 9
112-119 F8.4 --- DT10 Detrending component 10
121-130 F10.6 --- DT11 Detrending component 11
132-141 F10.6 --- DT12 Detrending component 12
143-152 F10.6 --- DT13 Detrending component 13
154-163 F10.6 --- DT14 Detrending component 14
165-174 F10.6 --- DT15 Detrending component 15
176-185 F10.6 --- DT16 Detrending component 16
187-196 F10.6 --- DT17 Detrending component 17
198-207 F10.6 --- DT18 Detrending component 18
209-218 F10.6 --- DT19 Detrending component 19
220-229 F10.6 --- DT20 Detrending component 20
231-240 F10.6 --- DT21 Detrending component 21
242-251 F10.6 --- DT22 Detrending component 22
253-262 F10.6 --- DT23 Detrending component 23
264-273 F10.6 --- DT24 Detrending component 24
275-284 F10.6 --- DT25 Detrending component 25
286-295 F10.6 --- DT26 Detrending component 26
--------------------------------------------------------------------------------
Byte-by-byte Description of file: c1not.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 F16.8 d BJD Barycentric Julian date in barycentric
dynamical time
18- 25 F8.6 --- Flux Raw flux
27- 34 F8.6 --- e_Flux Flux error scaled by the standard deviation
and the β value
36- 38 F3.1 --- DT1 Detrending component 1 (offset)
40- 62 F23.20 --- DT2 Detrending component 2
64- 86 F23.20 --- DT3 Detrending component 3
88-110 F23.20 --- DT4 Detrending component 4
--------------------------------------------------------------------------------
Byte-by-byte Description of file: c2not.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 F16.8 d BJD Barycentric Julian date in barycentric
dynamical time
18- 25 F8.6 --- Flux Raw flux
27- 34 F8.6 --- e_Flux Flux error scaled by the standard deviation
and the β value
36- 38 F3.1 --- DT1 Detrending component 1 (offset)
40- 47 F8.5 --- DT2 Detrending component 2
49- 58 F10.4 --- DT3 Detrending component 3
60- 69 F10.4 --- DT4 Detrending component 4
71- 80 F10.4 --- DT5 Detrending component 5
82- 91 F10.4 --- DT6 Detrending component 6
93-102 F10.4 --- DT7 Detrending component 7
104-112 F9.6 --- DT8 Detrending component 8
114-122 F9.6 --- DT9 Detrending component 9
124-132 F9.6 --- DT10 Detrending component 10
134-142 F9.6 --- DT11 Detrending component 11
144-152 F9.6 --- DT12 Detrending component 12
154-162 F9.6 --- DT13 Detrending component 13
164-172 F9.6 --- DT14 Detrending component 14
174-182 F9.6 --- DT15 Detrending component 15
184-192 F9.6 --- DT16 Detrending component 16
194-202 F9.6 --- DT17 Detrending component 17
204-214 F11.8 --- DT18 Detrending component 18
216-226 F11.8 --- DT19 Detrending component 19
228-238 F11.8 --- DT20 Detrending component 20
240-250 F11.8 --- DT21 Detrending component 21
252-262 F11.8 --- DT22 Detrending component 22
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Acknowledgements:
Jantje Freudenthal, jfreude(at)astro.physik.uni-goettingen.de
(End) Jantje Freudenthal [IAG, Germany], Patricia Vannier [CDS] 19-Jul-2019