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Unresolved stellar companions can cause both under-estimations in the radii of transiting planets and over-estimations of their detectability, affecting our ability to reliably measure planet occurrence rates. To quantify the latter, we…

The Kepler-11 planetary system contains six transiting planets ranging in size from 1.8 to 4.2 times the radius of Earth. Five of these planets orbit in a tightly-packed configuration with periods between 10 and 47 days. We perform a…

This paper presents an orbital analysis of six southern single-lined spectroscopic binary systems. The systems selected were shown to have circular or nearly circular orbits (e < 0.1) from earlier published solutions of only moderate…

Solar and Stellar Astrophysics · Physics 2012-11-26 John B. Hearnshaw , Siramas Komonjinda , Jovan Skuljan , Pam M. Kilmartin

Astronomical observations are affected by several kinds of noise, each with its own causal source; there is photon noise, stochastic source variability, and residuals coming from imperfect calibration of the detector or telescope. The…

Earth and Planetary Astrophysics · Physics 2016-06-29 Dun Wang , David W. Hogg , Dan Foreman-Mackey , Bernhard Schölkopf

Characterizing the dependence of the orbital architectures and formation environments on the eccentricity distribution of planets is vital for understanding planet formation. In this work, we perform statistical eccentricity studies of…

Earth and Planetary Astrophysics · Physics 2019-05-14 Sean M. Mills , Andrew W. Howard , Erik A. Petigura , Benjamin J. Fulton , Howard Isaacson , Lauren M. Weiss

We present results from long cadence Kepler observations covering 97.6 days of the newly discovered eclipsing cataclysmic variable KIS J192748.53+444724.5/KIC 8625249. We detect deep eclipses of the accretion disk by the donor star every…

Astrophysics of Galaxies · Physics 2015-06-16 S. Scaringi , P. J. Groot , M. Still

Phase curves and secondary eclipses of gaseous exoplanets are diagnostic of atmospheric composition and meteorology, and the long observational baseline and high photometric precision from the Kepler Mission make its dataset well-suited for…

Earth and Planetary Astrophysics · Physics 2019-05-29 Brian Jackson , Elisabeth Adams , Wesley Sandidge , Steven Kreyche , Jennifer Briggs

The Kepler space telescope yielded unprecedented data for the study of solar-like oscillations in other stars. The large samples of multi-year observations posed an enormous data analysis challenge that has only recently been surmounted.…

Observations of various solar-type stars along decades revealed that they can have magnetic cycles, just like our Sun. An investigation of the relation between their cycle length and rotation period can shed light on the dynamo mechanisms…

Solar and Stellar Astrophysics · Physics 2017-09-20 Raissa Estrela , Adriana Valio

The Kepler spacecraft, whose single instrument was a 0.95 m diameter wide-field telescope, operated in a heliocentric orbit for nearly a decade, returning a wealth of data that have revolutionized exoplanet science. Kepler data have been…

Earth and Planetary Astrophysics · Physics 2023-11-10 Jack J. Lissauer , Natalie M. Batalha , William J. Borucki

The Kepler mission has provided high quality light curves for more than 2000 eclipsing binaries. Tertiary companions to these binaries can be detected if they transit one or both stars in the binary or if they perturb the binary enough to…

Solar and Stellar Astrophysics · Physics 2015-03-26 Jerome A. Orosz

We have carried out an intensive study of photometric (Kepler Mission) and spectroscopic data on the system Kepler-2 (HAT-P-7A) using the dedicated software WinFitter. The mean individual data-point error of the normalized flux values for…

Earth and Planetary Astrophysics · Physics 2020-05-19 Michael D. Rhodes , Caglar Puskullu , Edwin Budding , Timothy S. Banks

The Characterising Exoplanet Satellite (CHEOPS) is a space mission designed to perform photometric observations of bright stars to obtain precise radii measurements of transiting planets. The high-precision photometry of CHEOPS relies on…

Instrumentation and Methods for Astrophysics · Physics 2020-03-04 Adrien Deline , Didier Queloz , Bruno Chazelas , Michaël Sordet , François Wildi , Andrea Fortier , Christopher Broeg , David Futyan , Willy Benz

Accurate stellar parameters and precise elemental abundances are vital pieces to correctly characterize discovered planetary systems, better understand planet formation, and trace galactic chemical evolution. We have performed a uniform…

Solar and Stellar Astrophysics · Physics 2018-08-29 John M. Brewer , Debra A. Fischer

With the unprecedented photometric precision of the Kepler Spacecraft, significant systematic and stochastic errors on transit signal levels are observable in the Kepler photometric data. These errors, which include discontinuities,…

Planetary transits provide a unique opportunity to investigate the surface distributions of star spots. Our aim is to determine if, with continuous observation (such as the data that will be provided by the Kepler mission), we can in…

Earth and Planetary Astrophysics · Physics 2015-06-04 J. Llama , M. Jardine , D. H. Mackay , R. Fares

We search for transits around all known pulsating {\delta} Sct variables (6500 K < Teff < 10 000 K) in the long-cadence Kepler data after subtracting the pulsation signal through an automated routine. To achieve this, we devise a simple and…

Solar and Stellar Astrophysics · Physics 2021-10-27 Daniel R. Hey , Benjamin T. Montet , Benjamin J. S. Pope , Simon J. Murphy , Timothy R. Bedding

In a few years the Kepler and TESS missions will provide ultra-precise photometry for thousands of RR Lyrae and hundreds of Cepheid stars. In the extended Kepler mission all targets are proposed in the Guest Observer (GO) Program, while the…

Solar and Stellar Astrophysics · Physics 2016-03-25 E. Plachy , L. Molnár , R. Szabó , K. Kolenberg , E. Bányai