J/AJ/163/121 Radial velocity and light curve of Kepler 1627A (Bouma+, 2022)
A 38 Million Year Old Neptune-sized Planet in the Kepler Field.
Bouma L.G., Curtis J.L., Masuda K., Hillenbrand L.A., Stefansson G.,
Isaacson H., Narita N., Fukui A., Ikoma M., Tamura M., Kraus A.L.,
Furlan E., Gnilka C.L., Lester K.V., Howell S.B.
<Astron. J., 163, 121 (2022)>
=2022AJ....163..121B 2022AJ....163..121B
ADC_Keywords: Exoplanets; Stars, G-type; Photometry, ugriz; Spectroscopy;
Radial velocities
Keywords: Exoplanet evolution ; Open star clusters ; Stellar ages
Abstract:
Kepler1627A is a G8V star previously known to host a 3.8R⊕
planet on a 7.2day orbit. The star was observed by the Kepler space
telescope because it is nearby (d=329pc) and it resembles the Sun.
Here, we show using Gaia kinematics, TESS stellar rotation periods,
and spectroscopic lithium abundances that Kepler1627 is a member of
the 38-5+6Myr old δLyr cluster. To our knowledge, this makes
Kepler1627Ab the youngest planet with a precise age yet found by the
prime Kepler mission. The Kepler photometry shows two peculiarities:
the average transit profile is asymmetric, and the individual transit
times might be correlated with the local light- curve slope. We
discuss possible explanations for each anomaly. More importantly, the
δLyr cluster is one of ∼103 coeval groups whose properties have
been clarified by Gaia. Many other exoplanet hosts are candidate
members of these clusters; their ages can be verified with the
trifecta of Gaia, TESS, and ground-based spectroscopy.
Description:
We observed a transit of Kepler1627Ab on the night of 2021 Aug 7 both
spectroscopically and photometrically. We used the HIRES echelle
spectrograph at the Keck I telescope and the MuSCAT3 photometer at
Haleakala Observatory on Maui, Hawaii.
Objects:
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RA (2000) DE Designation(s) (Period)
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18 56 13.6 +41 34 36.22 Kepler 1627 = Kepler-1627 (P=2.642)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 32 2124 MuSCAT3 photometry of Kepler 1627
table6.dat 35 22 Kepler 1627 radial velocities
table3.tar . . The light curve of Kepler 1627
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Description of file table3.tar:
Table 3 is available as a comma delimited table in the package. Two
Python scripts are also included to help read the variable-length
string columns. This table is a concatenation of the studies listed in
Table 4. One entry is shown for guidance regarding form and content.
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See also:
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I/345 : Gaia DR2 (Gaia Collaboration, 2018)
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/other/A+ARV/17.251 : Stars observed with Doppler imaging (Strassmeier, 2009)
J/ApJ/725/331 : Astrometry in the Galactic Center (Yelda+, 2010)
J/A+A/529/A75 : Limb-darkening coefficients (Claret+, 2011)
J/AJ/142/19 : Speckle observations of KOI (Howell+, 2011)
J/ApJ/733/L9 : Stellar rotation for 71 NGC 6811 members (Meibom+, 2011)
J/A+A/545/A55 : Extrasolar planets. Radial velocities 5 stars (Boisse+, 2012)
J/ApJS/199/24 : The first three quarters of Kepler mission (Tenenbaum+, 2012)
J/A+A/558/A53 : Milky Way global survey star clusters. II. (Kharchenko+, 2013)
J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)
J/MNRAS/436/1883 : Properties of KOI host stars (Walkowicz+, 2013)
J/A+A/564/A79 : Proper motions of open clusters from UCAC4 (Dias+, 2014)
J/AJ/147/146 : Spectroscopy of Tuc-Hor candidate members (Kraus+, 2014)
J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)
J/ApJ/804/146 : Atmospheric parameters for nearby B-F stars (David+, 2015)
J/ApJ/807/170 : Prograde vs retrogade motions. II. KOIs (Holczer+, 2015)
J/ApJS/225/15 : IR excess stars from Tycho-2 and AllWISE (Cotten+, 2016)
J/ApJ/829/23 : Stellar flares from Q0-Q17 Kepler LCs (Davenport, 2016)
J/ApJS/225/9 : Kepler TTVs. IX. Full long-cadence data set (Holczer+, 2016)
J/AJ/152/8 : Impact stellar multip. on planetary systems I. (Kraus+, 2016)
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J/MNRAS/461/794 : Scorpius-Centaurus K-Type Stars (Pecaut+, 2016)
J/AJ/152/113 : Pleiades members K2 light curves. I. Periods (Rebull+, 2016)
J/AJ/152/115 : Pleiades members K2 light curves. III. (Stauffer+, 2016)
J/ApJ/842/83 : Praesepe members rotational periods K2 LCs (Douglas+, 2017)
J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)
J/ApJ/851/116 : Long-term variability of Kepler sun-like stars (Montet+, 2017)
J/AJ/153/257 : Comoving stars in Gaia DR1 (Oh+, 2017)
J/AJ/154/224 : Transiting planets in young clusters from K2 (Rizzuto+, 2017)
J/ApJ/836/77 : Library of high-S/N optical spectra of FGKM stars (Yee+, 2017)
J/AJ/154/107 : California-Kepler Survey. I. 1305 stars (Petigura+, 2017)
J/ApJ/855/115 : Lithium abundances of KOIs from CKS spectra (Berger+, 2018)
J/ApJ/866/99 : Revised radii KIC stars & planet using GaiaDR2 (Berger+, 2018)
J/A+A/618/A93 : Gaia DR2 open clusters in the Milky Way (Cantat-Gaudin+, 2018)
J/AJ/155/177 : Obliquities planetary & eclipsing binary systems (Dai+, 2018)
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J/A+A/616/A10 : 46 openclusters GaiaDR2 HR diagrams (Gaia Collaboration, 2018)
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J/AJ/156/84 : APOGEE-2 survey of Orion Complex. II. (Kounkel+, 2018)
J/A+A/612/A99 : Gaia-ESO Survey in 7 open star cluster fields (Randich+, 2018)
J/ApJS/235/38 : Kepler planetary cand VIII. DR25 reliability (Thompson+, 2018)
J/A+A/620/A172 : Solar neighbourhood young stars 3D mapping (Zari+, 2018)
J/A+A/623/A108 : Age of 269 GDR2 open clusters (Bossini+, 2019)
J/ApJS/245/13 : CDIPS. I. LCs from TESS sectors 6 and 7 (Bouma+, 2019)
J/A+A/626/A17 : Young population in Vela-Puppis region (Cantat-Gaudin+, 2019)
J/A+A/623/A112 : The Sco OB2 population from Gaia DR2 data (Damiani+, 2019)
J/AJ/158/54 : Taurus members from stellar to planetary mass (Esplin+, 2019)
J/A+A/624/L11 : Coma Berenices neighbor moving group (Fuernkranz+, 2019)
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J/AJ/160/239 : Cluster difference imaging photo. survey. II. (Bouma+, 2020)
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J/A+A/635/A45 : 570 new open clusters in Galactic disc (Castro-Ginard+, 2020)
J/ApJ/903/96 : MUTA; the µTau Association (Gagne+, 2020)
J/ApJ/903/96 : MUTA; the µTau Association (Gagne+, 2020)
J/AJ/159/60 : 8695 flares 1228 stars in TESS sectors 1 & 2 (Gunther+, 2020)
J/AJ/160/279 : Untangling Galaxy. II. Structure within 3kpc (Kounkel+, 2020)
J/ApJ/893/67 : Smoothed amplitudes from Kepler, K2 & TESS phot (Morris, 2020)
J/A+A/639/A64 : Extended Meingast 1 source catalogue (Ratzenboeck+, 2020)
J/A+A/635/A43 : Stellar rotation periods K2 Campaigns 0-18 (Reinhold+, 2020)
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J/AJ/159/166 : Membership & properties of moving groups Gaia (Ujjwal+, 2020)
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J/AJ/162/197 : Photometry, rotation & Li open cluster NCG2516 (Bouma+, 2021)
J/AJ/161/265 : Compared rotation periods 1189 CKS host stars (David+, 2021)
J/A+A/649/A6 : Gaia Catalogue of Nearby Stars (Gaia collaboration, 2021)
J/ApJS/254/39 : Exoplanet candidates from TESS first 2yr obs (Guerrero+, 2021)
J/A+A/645/A42 : Flares in 5 open clusters (Ilin+, 2021)
J/A+A/645/A84 : Coronae of nearby star clusters (Meingast+, 2021)
J/AJ/161/171 : THYME. V. Discovering stellar association (Tofflemire+, 2021)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d BJD [2459433/2459435] Barycentric Julian Date; TDB
16- 22 F7.5 --- Flux [0.99/1.01] Relative flux in Filter
24- 30 F7.5 --- e_Flux [0.0009/0.002] Uncertainty in flux
32- 32 A1 --- Filt Filter used; g, r, i, or z
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d BJD [2459433/2459435] Barycentric Julian Date; TDB
16- 22 F7.2 m/s RVel [-149/153] Radial velocity
24- 28 F5.2 m/s e_RVel [11/15] Uncertainty in RVel
30- 35 F6.4 --- S-Value [0.64/0.75] Ca H & K line S-Value index
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 10-May-2022