A5100428337- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Astronomical and nuclear sciences
- Galaxies: Formation, Evolution, Phenomena
- Black Holes and Theoretical Physics
- Color Science and Applications
- Astronomical Observations and Instrumentation
- Relativity and Gravitational Theory
- CCD and CMOS Imaging Sensors
- Infrared Target Detection Methodologies
- Spectroscopy and Chemometric Analyses
- Blind Source Separation Techniques
- Solar and Space Plasma Dynamics
- Experimental and Theoretical Physics Studies
- Photoreceptor and optogenetics research
- Dark Matter and Cosmic Phenomena
- Technology Assessment and Management
University of Science and Technology of China
2023-2024
University of South China
2022-2024
Yunnan University
2022
Ames Research Center
2010-2020
Search for Extraterrestrial Intelligence
2010-2020
The Kepler mission was designed to determine the frequency of Earth-sized planets in and near habitable zone Sun-like stars. is region where planetary temperatures are suitable for water exist on a planet's surface. During first 6 weeks observations, monitored 156,000 stars, five new exoplanets with sizes between 0.37 1.6 Jupiter radii orbital periods from 3.2 4.9 days were discovered. density Neptune-sized Kepler-4b similar that Neptune GJ 436b, even though irradiation level 800,000 times...
On 2011 February 1 the Kepler mission released data for 156,453 stars observed from beginning of science observations on 2009 May 2 through September 16. There are 1235 planetary candidates with transit-like signatures detected in this period. These associated 997 host stars. Distributions characteristics separated into five class sizes: 68 approximately Earth-size (Rp < 1.25 R⊕), 288 super-Earth-size (1.25 R⊕ ⩽ Rp 662 Neptune-size (2 6 165 Jupiter-size (6 15 and 19 up to twice size Jupiter...
New transiting planet candidates are identified in 16 months (2009 May-2010 September) of data from the Kepler spacecraft.Nearly 5000 periodic transit-like signals vetted against astrophysical and instrumental false positives yielding 1108 viable new candidates, bringing total count up to over 2300.Improved vetting metrics employed, contributing higher catalog reliability.Most notable is noise-weighted robust averaging multiquarter photo-center offsets derived difference image analysis that...
The Kepler Mission Science Operations Center (SOC) performs several critical functions including managing the ~156,000 target stars, associated tables, science data compression tables and parameters, as well processing raw photometric downlinked from spacecraft each month. are first calibrated at pixel level to correct for bias, smear induced by a shutterless readout, other detector electronic effects. A background sky flux is estimated ~4500 pixels on of 84 CCD readout channels, simple...
The Kepler Mission seeks to detect Earth-size planets transiting solar-like stars in its ∼115 deg2 field of view over the course 3.5 year primary mission by monitoring brightness each ∼156,000 Long Cadence stellar targets with a time resolution 29.4 minutes. We discuss photometric precision achieved on timescales relevant transit detection for data obtained 33.5 day long Quarter 1 (Q1) observations that ended 2009 June 15. lower envelope at various is consistent expected random noise...
The Kepler Mission was designed to identify and characterize transiting planets in the Field of View determine their occurrence rates. Emphasis placed on identification Earth-size orbiting Habitable Zone host stars. Science data were acquired for a period four years. Long-cadence with 29.4 min sampling obtained ~200,000 individual stellar targets at least one observing quarter primary Mission. Light curves target stars are extracted Data Processing Pipeline, searched planet signatures. A...
ABSTRACT We present the seventh Kepler planet candidate (PC) catalog, which is first catalog to be based on entire, uniformly processed 48-month data set. This fully automated employing robotic vetting procedures evaluate every periodic signal detected by Q1–Q17 Data Release 24 (DR24) pipeline. While we prioritize uniform over absolute correctness of individual objects, find that our overall comparable to, and in most cases superior human employed past catalogs. utilize artificial transit...
We measure planet occurrence rates using the candidates discovered by Q1-Q16 Kepler pipeline search. This study examines for GK dwarf target sample radii, 2.5 , and orbital periods, 300 days, with an emphasis on a thorough exploration identification of most important sources systematic uncertainties. Integrating over this parameter space, we rate F0 = 0.77 planets per star, allowed range 1.9. The takes into account both statistical uncertainties, values beyond are significantly in...
Eighty planetary systems of two or more planets are known to orbit stars other than the Sun. For most, data can be sufficiently explained by non-interacting Keplerian orbits, so dynamical interactions these have not been observed. Here we present 4 sets lightcurves from Kepler spacecraft, which each show multiple transiting same star. Departure timing transits strict periodicity indicates perturbing other: observed variations match forcing frequency planet. This confirms that objects in...
The Kepler spacecraft has been monitoring the light from 150,000 stars in its primary quest to detect transiting exoplanets. Here we report on detection of an eclipsing stellar hierarchical triple, identified photometry. KOI-126 (A,(B, C)), is composed a low-mass binary (masses M_B = 0.2413+/-0.0030 M_Sun, M_C 0.2127+/-0.0026 M_Sun; radii R_B 0.2543+/-0.0014 R_Sun, R_C 0.2318+/-0.0013 R_Sun; orbital period P_1 1.76713+/-0.00019 days) eccentric orbit about third star (mass M_A 1.347+/-0.032...
We discuss the discovery and characterization of circumbinary planet Kepler-38b. The stellar binary is single-lined, with a period 18.8 days, consists moderately evolved main-sequence star (M_A = 0.949 +/- 0.059 solar masses R_A 1.757 0.034 radii) paired low-mass (M_B 0.249 0.010 R_B 0.2724 0.0053 in mildly eccentric (e=0.103) orbit. A total eight transits due to crossing primary were identified Kepler light curve (using Quarters 1 through 11), from which planetary 105.595 0.053 days can be...
This paper discusses the transit model fitting and multiple-planet search algorithms performance of Kepler Science Data Processing Pipeline, developed by Operations Center (SOC). Threshold Crossing Events (TCEs), which are candidate events, generated Transiting Planet Search (TPS) component pipeline subsequently processed in Validation (DV) component. The is used DV to fit TCEs order characterize planetary candidates derive parameters that various diagnostic tests classify them. After...
The Kepler mission discovered 2842 exoplanet candidates with 2 years of data. We provide updates to the planet candidate sample based upon 3 (Q1-Q12) Through a series tests exclude false-positives, primarily caused by eclipsing binary stars and instrumental systematics, 855 additional planetary have been discovered, bringing total number known 3697. revised transit parameters accompanying posterior distributions on Markov Chain Monte Carlo algorithm for cumulative catalogue Objects Interest....
We report on the discovery and validation of Kepler-452b, a transiting planet identified by search through 4 years data collected NASA's Kepler Mission. This possibly rocky orbits its G2 host star every days, longest orbital period for small ( ) exoplanet to date. The likelihood that this has composition lies between 49% 62%. an effective temperature 5757 ± 85 K 4.32 0.09. At mean separation AU, is well within optimistic habitable zone (recent Venus/early Mars), experiencing only 10% more...
We present a method to confirm the planetary nature of objects in systems with multiple transiting exoplanet candidates. This involves Fourier-Domain analysis deviations transit times from constant period that result dynamical interactions within system. The combination observed anti-correlations and mass constraints stability allow us claim discovery four Kepler-25, Kepler-26, Kepler-27, Kepler-28, containing eight planets one additional planet candidate.
We present the discovery of Kepler-19 planetary system, which we first identified from a 9.3 day periodic transit signal in Kepler photometry. From high-resolution spectroscopy star, find stellar effective temperature Teff = 5541 ± 60 K, metallicity [Fe/H] −0.13 0.06, and surface gravity log(g) 4.59 0.10. combine estimate with an density derived photometric light curve to deduce mass M⋆ 0.936 0.040 M☉ radius R⋆ 0.850 0.018 R☉ (these errors do not include uncertainties models). rule out...
We present results of the final Kepler Data Processing Pipeline search for transiting planet signals in full 17-quarter primary mission data set. The includes a total 198,709 stellar targets, which 112,046 were observed all 17 quarters and 86,663 fewer than quarters. report on 17,230 targets at least one transit signature is identified that meets specified detection criteria: periodicity, minimum three events, statistic (i.e., signal-to-noise ratio) excess threshold, passing grade...
Doppler planet searches have discovered that giant planets follow orbits with a wide range of orbital eccentricities, revolutionizing theories formation. The discovery hundreds exoplanet candidates by NASA's Kepler mission enables astronomers to characterize the eccentricity distribution small exoplanets. Measuring individual is only practical in favorable cases are amenable complementary techniques (e.g., radial velocities, transit timing variations, occultation photometry). Yet even...
The architectures of multiple planet systems can provide valuable constraints on models formation, including orbital migration, and excitation eccentricities inclinations. NASA's Kepler mission has identified 1235 transiting candidates (Borcuki et al 2011). method transit timing variations (TTVs) already confirmed 7 planets in two planetary (Holman al. 2010; Lissauer 2011a). We perform a analysis the candidates. find that at least ~12% currently suitable for TTV show evidence suggestive...
We present a new method for confirming transiting planets based on the combination of transit timingn variations (TTVs) and dynamical stability. Correlated TTVs provide evidence that pair bodies are in same physical system. Orbital stability provides upper limits masses companions planetary regime. This paper describes non-parametric technique quantifying statistical significance correlation two TTV data sets. apply this to an analysis timing stars with multiple planet candidates identified...
Abstract We explore the properties of white dwarfs within framework Rastall-Rainbow gravity. Employing Chandrasekhar equation state in conjunction with modified Tolman-Oppenheimer-Volkoff equation, we calculate mass-radius relations dwarfs. also obtain confidence levels for parameters based on some observed Numerical results show that gravity can not only align well these observations, but account existence super-Chandrasekhar In addition, gravitational redshift, compactness and dynamical...
Abstract We present a visible-light full orbital phase curve of the transiting planet WASP-18b measured by TESS mission. The includes transit, secondary eclipse, and sinusoidal modulations across shaped planet’s atmospheric characteristics star–planet gravitational interaction. measure beaming (Doppler boosting) tidal ellipsoidal distortion show that amplitudes both agree with theoretical expectations. find light from dayside hemisphere occulted during relative brightness <?CDATA...
Abstract Young exoplanets are snapshots of the planetary evolution process. Planets that orbit stars in young associations particularly important because age system is well constrained. We present discovery a transiting planet larger than Neptune but smaller Saturn 45 Myr Tucana–Horologium moving group. The host star visual binary, and our follow-up observations demonstrate orbits G6V primary component, DS Tuc A (HD 222259A, TIC 410214986). first identified transits using photometry from...