Finding Earth-size planets in the habitable zone: the<i>Kepler Mission</i>

Borucki, W. J.; Koch, David; Basri, Gibor; Batalha, Natalie M.; Brown, Timothy M.; Caldwell, Douglas A.; Christensen‐Dalsgaard, J.; Cochran, William D.; Dunham, E. W.; Gautier, T. N.; Geary, John C.; Gilliland, Ronald L.; Jenkins, Jon M.; Kondo, Y.; Latham, David W.; Lissauer, Jack J.; Monet, D. G.

doi:10.1017/s174392130801630x

Cited by 34 publications

(24 citation statements)

References 19 publications

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“…The wealth of data obtained by the photometric space missions CoRoT (Baglin et al, 2006), Kepler (Borucki et al, 2008) and K2 (Howell et al, 2014) are currently being explored. Exploiting these as well as data from future complementary (space) telescopes such as TESS (Ricker et al, 2014), PLATO (Rauer et al, 2014) and the groundbased SONG network (Grundahl et al, 2014) will be essential to study many of the questions that are still open in stellar structure and evolution of giant stars exhibiting solar-like oscillations.…”

Section: Futurementioning

confidence: 99%

Giant star seismology

Hekker

Christensen‐Dalsgaard

2017

Astron Astrophys Rev

168

133

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The internal properties of stars in the red-giant phase undergo significant changes on relatively short timescales. Long near-uninterrupted high-precision photometric timeseries observations from dedicated space missions such as CoRoT and Kepler have provided seismic inferences of the global and internal properties of a large number of evolved stars, including red giants. These inferences are confronted with predictions from theoretical models to improve our understanding of stellar structure and evolution. Our knowledge and understanding of red giants have indeed increased tremendously using these seismic inferences, and we anticipate that more information is still hidden in the data. Unraveling this will further improve our understanding of stellar evolution. This will also have significant impact on our knowledge of the Milky Way Galaxy as well as on exo-planet host stars. The latter is important for our understanding of the formation and structure of planetary systems.

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Section: Futurementioning

confidence: 99%

Giant star seismology

Hekker

Christensen‐Dalsgaard

2017

Astron Astrophys Rev

168

133

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“…Results from these tests provide also in many cases insights into the nature of the sources of the false positives, which are generally produced by one of several kinds of configurations involving eclipsing binaries (EB). Hence, we obtain results about the population of these systems, which may be useful to the study of the distribution of binary systems, and for the calibration of the expected number and nature of false positives in upcoming and planned space missions for transit searches, such as Kepler (Borucki et al 2008;Gautier et al 2007, for ground-based follow-up), TESS The CoRoT space mission, launched on December 27th 2006, has been developed and is operated by CNES, with the contribution of Austria, Belgium, Brazil , ESA (RSSD and Science Programme), Germany and Spain. (Brown & Latham 2008), and PLATO (Catala & the PLATO consortium 2008).…”

Section: Introductionmentioning

confidence: 99%

Rate and nature of false positives in the CoRoT exoplanet search

Almenara

Deeg

Aigrain

et al. 2009

A&A

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Context. The CoRoT satellite searches for planets by applying the transit method, monitoring up to 12 000 stars in the galactic plane for 150 days in each observing run. This search is contaminated by a large fraction of false positives, caused by different eclipsing binary configurations that might be confused with a transiting planet. Aims. We evaluate the rates and nature of false positives in the CoRoT exoplanets search and compare our results with semiempirical predictions. Methods. We consider the detected binary and planet candidates in the first three extended CoRoT runs, and classify the results of the follow-up observations completed to verify their planetary nature. We group the follow-up results into undiluted binaries, diluted binaries, and planets and compare their abundances with predictions from the literature. Results. 83% of the initial detections are classified as false positives using only the CoRoT light-curves, the remaining 17% require follow-up observations. Finally, 12% of the candidates in the follow-up program are planets. The shape of the overall distribution of the false positive rate follows previous predictions, except for candidates with transit depths below about 0.4%. For candidates with transit depths in the range from 0.1-0.4%, CoRoT detections are nearly complete, and this difference from predictions is probably real and dominated by a lower than expected abundance of diluted eclipsing binaries.

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“…This reference function includes dependencies on T eff and [Fe/H] and increases the accuracy of masses and radii determined using the scaling relations by a factor of 2. It can immediately be used to estimate more accurate masses and radii for the ten thousands of stars for which solar-like oscillations have been observed by CoRot (Baglin et al 2006), Kepler (Borucki et al 2008) and K2 (Haas et al 2014) and that are currently being studied. Additionally, this can be applied to the many oscillators expected to be observed by missions such as TESS (Ricker et al 2015) and Plato (Rauer et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Significantly improving stellar mass and radius estimates: a new reference function for the Δν scaling relation

Guggenberger

Hekker

Basu

et al. 2016

Mon. Not. R. Astron. Soc.

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The scaling relations between global asteroseismic observables and stellar properties are widely used to estimate masses and radii of stars exhibiting solar-like oscillations. Since the mass and radius of the Sun are known independently, the Sun is commonly used as a reference to scale to. However, the validity of the scaling relations depends on the homology between the star under study and the reference star. Solarlike oscillators span a wide range of masses and metallicities, as well as evolutionary phases. Most of these stars are therefore not homologous to the Sun. This leads to errors of up to 10% (5%) in mass (radius) when using the asteroseismic scaling relations with the Sun as the reference. In this paper we derive a reference function to replace the solar-reference value used in the large-frequency-separation scaling relation. Our function is the first that depends on both effective temperature and metallicity, and is applicable from the end of the main sequence to just above the bump on the red giant branch. This reference function improves the estimates of masses and radii determined through scaling relations by a factor of 2, i.e. allows masses and radii to be recovered with an accuracy of 5% and 2%, respectively.

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Finding Earth-size planets in the habitable zone: theKepler Mission

Cited by 34 publications

References 19 publications

Giant star seismology

Giant star seismology

Rate and nature of false positives in the CoRoT exoplanet search

Significantly improving stellar mass and radius estimates: a new reference function for the Δν scaling relation

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