Results 81 to 90 of about 150,874 (286)
A Technique to Derive Improved Proper Motions for Kepler Objects of Interest [PDF]
, 2014 We outline an approach yielding proper motions with higher precision than exists in present catalogs for a sample of stars in the Kepler field. To increase proper motion precision we combine first moment centroids of Kepler pixel data from a single ...
Benedict, G. Fritz +3 more
core +4 more sources
Revised Stellar Properties of Kepler Targets for the Q1-17 (DR25) Transit Detection Run [PDF]
, 2016 The determination of exoplanet properties and occurrence rates using Kepler data critically depends on our knowledge of the fundamental properties (such as temperature, radius, and mass) of the observed stars.
S. Mathur +16 more
semanticscholar +1 more source
Astronomische Nachrichten, EarlyView.ABSTRACT Isochrones, equal‐age curves, are widely used in astrophysics to estimate stellar ages. Classical stellar parameters are, however, very limited in their usability for main sequence stars because of their weak age‐dependence. Here, rotation period measurements provide complementary information.
David Gruner, Sydney A. Barnes
wiley +1 more source
The Astronomical JournalWe present a new analysis of Kepler-21, the brightest ( V = 8.5) Kepler system with a known transiting exoplanet, Kepler-21 b. Kepler-21 b is a radius valley planet ( R = 1.6 ± 0.2 R _⊕ ) with an Earth-like composition (8.38 ± 1.62 g cm ^–3 ), though its
Corey Beard +28 more
doaj +1 more source
Properties of 249 δ Scuti Variable Star Candidates Observed During the NASA K2 Mission
Frontiers in Astronomy and Space Sciences, 2019 In the second phase of the NASA Kepler mission (K2), the Kepler spacecraft observed fields along the ecliptic plane for about 80 days each to search for planetary transits and monitor stellar variability. We analyzed the light curves of thousands of main-
Joyce Ann Guzik +2 more
doaj +1 more source
The scattering outcomes of Kepler circumbinary planets: planet mass ratio
, 2017 Recent studies reveal that the free eccentricities of Kepler-34b and Kepler-413b are much larger than their forced eccentricities, implying that the scattering events may take place in their formation.
Gong, Yan-Xiang, Ji, Jianghui
core +1 more source
No Evidence for Lunar Transit in New Analysis of Hubble Space Telescope Observations of the Kepler-1625 System [PDF]
Astrophysical Journal, 2019 Observations of the Kepler-1625 system with Kepler and the Hubble Space Telescope have suggested the presence of a candidate exomoon, Kepler-1625b I, a Neptune-radius satellite orbiting a long-period Jovian planet.
L. Kreidberg, R. Luger, M. Bedell
semanticscholar +1 more source
Confirmation of a Non‐Transiting Planet in the Habitable Zone of the Nearby M Dwarf L 98‐59
Astronomische Nachrichten, EarlyView.ABSTRACT Only 40 exoplanetary systems with five or more planets are currently known. These systems are crucial for our understanding of planet formation and planet‐planet interaction. The M dwarf L 98‐59 has previously been found to show evidence of five planets, three of which are transiting.
Paul I. Schwarz +2 more
wiley +1 more source
Photometry Using Kepler “Superstamps” of Open Clusters NGC 6791 & NGC 6819
EPJ Web of Conferences, 2015 The Kepler space telescope has proven to be a gold mine for the study of variable stars. Usually, Kepler only reads out a handful of pixels around each pre-selected target star, omitting a large number of stars in the Kepler field.
Kuehn Charles A. +6 more
doaj +1 more source
Overcoming intra-molecular repulsions in PEDTT by sulphate counter-ion
Science and Technology of Advanced Materials, 2021 We set out to demonstrate the development of a highly conductive polymer based on poly-(3,4-ethylenedithia thiophene) (PEDTT), PEDOTs structural analogue historically notorious for structural disorder and limited conductivities.
Dominik Farka +8 more
doaj +1 more source