DISCOVERY AND VALIDATION OF Kepler-452b: A 1.6<i>R</i><sub>⨁</sub>SUPER EARTH EXOPLANET IN THE HABITABLE ZONE OF A G2 STAR

Jenkins, Jon M.; Twicken, Joseph D.; Batalha, Natalie M.; Caldwell, Douglas A.; Cochran, William D.; Endl, Michael; Latham, David W.; Esquerdo, Gilbert A.; Seader, Shawn; Bieryla, Allyson; Petigura, Erik A.; Ciardi, David R.; Marcy, Geoffrey W.; Isaacson, Howard; Huber, Daniel; Rowe, Jason F.; Torres, Guillermo; Bryson, Stephen T.; Buchhave, Lars A.; Ramírez, Iván; Wolfgang, Angie; Li, Jie; Campbell, Jennifer R.; Tenenbaum, Peter; Sanderfer, Dwight T.; Henze, Christopher E.; Catanzarite, J.; Gilliland, Ronald L.; Borucki, W. J.

doi:10.1088/0004-6256/150/2/56

Cited by 165 publications

(107 citation statements)

References 87 publications

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“…Such follow-up could, in a similar way to the validation of other single transiting systems such as Kepler-452 (Jenkins et al 2015), constitute a probabilistic validation of the planet without observing subsequent transits. Similarly, three of the 17 single transiting exoplanets detected by Wang et al (2015) were probabilistically validated using such methods.…”

Section: Validationmentioning

confidence: 97%

Single transit candidates from K2: detection and period estimation

Osborn

Armstrong

Brown

et al. 2016

Mon. Not. R. Astron. Soc.

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Photometric surveys such as Kepler have the precision to identify exoplanet and eclipsing binary candidates from only a single transit. K2, with its 75 d campaign duration, is ideally suited to detect significant numbers of single-eclipsing objects. Here we develop a Bayesian transit-fitting tool ('Namaste: An Mcmc Analysis of Single Transit Exoplanets') to extract orbital information from single transit events. We achieve favourable results testing this technique on known Kepler planets, and apply the technique to seven candidates identified from a targeted search of K2 campaigns 1, 2 and 3. We find EPIC203311200 to host an excellent exoplanet candidate with a period, assuming zero eccentricity, of 540 +410 −230 d and a radius of 0.51 ± 0.05R Jup . We also find six further transit candidates for which more follow-up is required to determine a planetary origin. Such a technique could be used in the future with TESS, PLATO and ground-based photometric surveys such as NGTS, potentially allowing the detection of planets in reach of confirmation by Gaia.

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Section: Validationmentioning

confidence: 97%

Single transit candidates from K2: detection and period estimation

Osborn

Armstrong

Brown

et al. 2016

Mon. Not. R. Astron. Soc.

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“…Jenkins et al 2015), characterising EGPs is still of high importance for answering these questions. Moreover, since their formation process is tightly connected, it is important to understand the formation processes of the large planets before exploring those of the smallest ones.…”

Section: Introductionmentioning

confidence: 99%

SOPHIE velocimetry ofKeplertransit candidates

Santerne

Moutou

Tsantaki

et al. 2016

A&A

264

263

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While giant extrasolar planets have been studied for more than two decades now, there are still some open questions as to their dominant formation and migration processes, as well as to their atmospheric evolution in different stellar environments. In this paper, we study a sample of giant transiting exoplanets detected by the Kepler telescope with orbital periods up to 400 days. We first defined a sample of 129 giant-planet candidates that we followed up with the SOPHIE spectrograph (OHP, France) in a 6-year radial velocity campaign. This allowed us to unveil the nature of these candidates and to measure a false-positive rate of 54.6 ± 6.5% for giant-planet candidates orbiting within 400 days of period. Based on a sample of confirmed or likely planets, we then derived the occurrence rates of giant planets in different ranges of orbital periods. The overall occurrence rate of giant planets within 400 days is 4.6 ± 0.6%. We recovered, for the first time in the Kepler data, the different populations of giant planets reported by radial velocity surveys. Comparing these rates with other yields, we find that the occurrence rate of giant planets is lower only for hot Jupiters but not for the longer-period planets. We also derive a first measurement of the occurrence rate of brown dwarfs in the brown-dwarf desert with a value of 0.29 ± 0.17%. Finally, we discuss the physical properties of the giant planets in our sample. We confirm that giant planets receiving moderate irradiation are not inflated, but we find that they are on average smaller than predicted by formation and evolution models. In this regime of low-irradiated giant planets, we find a possible correlation between their bulk density and the iron abundance of the host star, which needs more detections to be confirmed.

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“…This conclusion is of great importance since circular orbits are frequently assumed when modeling exoplanets in the habitable zone (Barclay et al, 2013;Borucki et al, 2013;Quintana et al, 2014;Jenkins et al, 2015) or when estimating the detection completeness for planet occurrence studies (e.g., Howard et al, 2012;Dong & Zhu, 2013;Petigura et al, 2013;Burke et al, 2015).…”

Section: Orbital Eccentricities Of Exoplanetsmentioning

confidence: 99%

Synergies Between Asteroseismology and Exoplanetary Science

Huber

2017

Astrophysics and Space Science Proceedings

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Over the past decade asteroseismology has become a powerful method to systematically characterize host stars and dynamical architectures of exoplanet systems. In this contribution I review current key synergies between asteroseismology and exoplanetary science such as the precise determination of planet radii and ages, the measurement of orbital eccentricities, stellar obliquities and their impact on hot Jupiter formation theories, and the importance of asteroseismology on spectroscopic analyses of exoplanet hosts. I also give an outlook on future synergies such as the characterization of sub-Neptune-size planets orbiting solar-type stars, the study of planet populations orbiting evolved stars, and the determination of ages of intermediate-mass stars hosting directly imaged planets.

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DISCOVERY AND VALIDATION OF Kepler-452b: A 1.6R_⨁SUPER EARTH EXOPLANET IN THE HABITABLE ZONE OF A G2 STAR

Cited by 165 publications

References 87 publications

Single transit candidates from K2: detection and period estimation

Single transit candidates from K2: detection and period estimation

SOPHIE velocimetry ofKeplertransit candidates

Synergies Between Asteroseismology and Exoplanetary Science

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DISCOVERY AND VALIDATION OF Kepler-452b: A 1.6R⨁SUPER EARTH EXOPLANET IN THE HABITABLE ZONE OF A G2 STAR

Cited by 165 publications

References 87 publications

Single transit candidates from K2: detection and period estimation

Single transit candidates from K2: detection and period estimation

SOPHIE velocimetry ofKeplertransit candidates

Synergies Between Asteroseismology and Exoplanetary Science

Contact Info

Product

Resources

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DISCOVERY AND VALIDATION OF Kepler-452b: A 1.6R_⨁SUPER EARTH EXOPLANET IN THE HABITABLE ZONE OF A G2 STAR