نتایج جستجو برای: kepler
تعداد نتایج: 3116 فیلتر نتایج به سال:
Determining habitable zones in binary star systems can be a challenging task due to the combination of perturbed planetary orbits and varying stellar irradiation conditions. The concept “dynamically informed zones” allows us, nevertheless, make predictions on where look for worlds such complex environments. Dynamically have been used past investigate habitability circumstellar planets Earth-lik...
We present the characterization of the Kepler-93 exoplanetary system, based on three years of photometry gathered by the Kepler spacecraft. The duration and cadence of the Kepler observations, in tandem with the brightness of the star, enable unusually precise constraints on both the planet and its host. We conduct an asteroseismic analysis of the Kepler photometry and conclude that the star ha...
Kepler-296 is a binary star system with two M-dwarf components separated by 0.2”. Five transiting planets have been confirmed to be associated with the Kepler-296 system; given the evidence to date, however, the planets could in principle orbit either star. This ambiguity has made it difficult to constrain both the orbital and physical properties of the planets. Using both statistical and analy...
This article gives an introduction to a long-term project called Flyspeck, whose purpose is to give a formal verification of the Kepler Conjecture. The Kepler Conjecture asserts that the density of a packing of equal radius balls in three dimensions cannot exceed π/ √ 18. The original proof of the Kepler Conjecture, from 1998, relies extensively on computer calculations. Because the proof relie...
We have used asteroseismology to determine fundamental properties for 66 Kepler planet-candidate host stars, with typical uncertainties of 3% and 7% in radius and mass, respectively. The results include new asteroseismic solutions for four host stars with confirmed planets (Kepler-4, Kepler-14, Kepler-23 and Kepler-25) and increase the total number of Kepler host stars with asteroseismic soluti...
The properties of the interstellar medium (ISM) surrounding a planetary system can impact planetary climate through a number of mechanisms, including changing the size of the astrosphere (one of the major shields for cosmic rays) as well as direct deposition of material into planetary atmospheres. In order to constrain the ambient ISM conditions for exoplanetary systems, we present observations...
We initiated the Robo-AO Kepler Planetary Candidate Survey in 2012 to observe each Kepler exoplanet candidate host star with high-angular-resolution visible-light laser-adaptive-optics imaging. Our goal is to find nearby stars lying in Kepler ’s photometric apertures that are responsible for the relatively high probability of false-positive exoplanet detections and that cause underestimates of ...
Barycentric corrections made to the timing of Kepler observations, necessitated by variations in light arrival time at the satellite, break the regular time-sampling of the data – the time stamps are periodically modulated. A consequence is that Nyquist aliases are split into multiplets that can be identified by their shape. Real pulsation frequencies are distinguishable from these aliases and ...
In this paper, we introduce the Enhanced Kepler Framework, an evolution of the original Kepler framework which implements an OAI-PMH-compliant data provider for individual publishers. The enhanced Kepler framework is heavily influenced by Fasttrack, a peer-to-peer network. In particular, we introduce the concept of buddy nodes and SuperNodes to improve scalability. We also propose enhancements ...
Abstract Although resonant planets have orbital periods near commensurability, resonance is also dictated by other factors, such as the planets’ eccentricities and masses, therefore must be confirmed through a study of system’s dynamics. Here, we perform for five multiplanet systems: Kepler-226, Kepler-254, Kepler-363, Kepler-1542, K2-32. For each system, run suite N -body simulations that span...
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