J/ApJ/785/15 Transit times for Kepler-79's known planets (Jontof-Hutter+, 2014) ================================================================================ Kepler-79's low density planets. Jontof-Hutter D., Lissauer J.J., Rowe J.F., Fabrycky D.C. =2014ApJ...785...15J (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Stars, double and multiple ; Planets ; Ephemerides Keywords: planetary systems - stars: individual: KOI-152, Kepler-79 - techniques: photometric Abstract: Kepler-79 (KOI-152) has four planetary candidates ranging in size from 3.5 to 7 times the size of the Earth, in a compact configuration with orbital periods near a 1:2:4:6 chain of commensurability, from 13.5 to 81.1 days. All four planets exhibit transit timing variations with periods that are consistent with the distance of each planet to resonance with its neighbors. We perform a dynamical analysis of the system based on transit timing measurements over 1282 days of Kepler photometry. Stellar parameters are obtained using a combination of spectral classification and the stellar density constraints provided by light curve analysis and orbital eccentricity solutions from our dynamical study. Our models provide tight bounds on the masses of all four transiting bodies, demonstrating that they are planets and that they orbit the same star. All four of Kepler-79's transiting planets have low densities given their sizes, which is consistent with other studies of compact multiplanet transiting systems. The largest of the four, Kepler-79 d (KOI-152.01), has the lowest bulk density yet determined among sub-Saturn mass planets. Description: Variations in the brightness of Kepler-79 were monitored with an effective duty cycle exceeding 90% starting at barycentric Julian date (BJD) 2454964.512, with all data returned to Earth at a cadence of 29.426 minutes (long cadence, LC); data were also returned at a cadence of 58.85 s (short cadence, SC) beginning from BJD 2455093.216. Here and throughout we base our timeline for transit data from T=JD-2454900. Our analysis uses SC data where available, augmented by the LC data set primarily during the epoch prior to T<193 days, for which no SC data were returned to Earth. Objects: ----------------------------------------------------- RA (ICRS) DE Designation(s) ----------------------------------------------------- 20 02 04.11 +44 22 53.6 Kepler-79 = KOI-152 ----------------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 75 95 Measured transit times through Q16 and uncertainties for the four known planets of Kepler-79 -------------------------------------------------------------------------------- See also: V/133 : Kepler Input Catalog (Kepler Mission Team, 2009) J/ApJS/197/8 : Kepler's candidate multiple transiting planets (Lissauer+, 2011) J/ApJS/208/16 : Kepler transit timing observations. VIII. (Mazeh+, 2013) J/ApJS/217/31 : Kepler planetary candidates. VI. 4yr Q1-Q16 (Mullally+, 2015) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 F10.5 d JD-79b Kepler-79b measured transit Julian Date (1) 12- 18 F7.5 d e_JD-79b Uncertainty in JD-79b 20- 29 F10.5 d JD-79c ? Kepler-79c measured transit Julian Date (1) 31- 37 F7.5 d e_JD-79c ? Uncertainty in JD-79c 39- 48 F10.5 d JD-79d ? Kepler-79d measured transit Julian Date (1) 50- 56 F7.5 d e_JD-79d ? Uncertainty in JD-79d 58- 67 F10.5 d JD-79e ? Kepler-79e measured transit Julian Date (1) 69- 75 F7.5 d e_JD-79e ? Uncertainty in JD-79e -------------------------------------------------------------------------------- Note (1): JD-2454900.0. -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 28-Jun-2017