Results 91 to 100 of about 22,639,627 (262)

Using the inclinations of Kepler systems to prioritize new Titius-Bode-based exoplanet predictions [PDF]

open access: yes, 2014
We analyse a sample of multiple-exoplanet systems which contain at least three transiting planets detected by the Kepler mission (‘Kepler multiples’). We use a generalized Titius– Bode relation to predict the periods of 228 additional planets in 151 of ...
Timothy Bovaird   +2 more
semanticscholar   +1 more source

Statistical Distribution Function of Orbital Spacings in Planetary Systems

open access: yesThe Astronomical Journal
The minimum orbital separation of planets in long-stable planetary systems is often modeled as a step function, parameterized with a single value ${{\rm{\Delta }}}_{\min }$ (measured in mutual Hill radius of the two neighboring planets).
Jeremy Dietrich   +2 more
doaj   +1 more source

Spectroscopic Follow-up of Gaia Exoplanet Candidates: Impostor Binary Stars Invade the Gaia DR3 Astrometric Exoplanet Candidates

open access: yesThe Astronomical Journal, 2023
In this paper, we report on the follow-up of six potential exoplanets detected with Gaia astrometry and provide an overview of what is currently known about the nature of the entire Gaia astrometric exoplanet candidate sample, 72 systems in total.
Marcus L. Marcussen, Simon H. Albrecht
doaj   +1 more source

Analysis of Autoguiding for Exoplanet Transit Research at the UNH Observatory [PDF]

open access: yes, 2019
This paper will discuss the proper calibration technique for an autoguider of a CCD camera and the results that follow from successful exoplanet transit observations.
Cappuccio, Anthony
core   +1 more source

Exoplanet albedo spectra and colors as a function of planet phase, separation, and metallicity [PDF]

open access: yes, 2010
First generation optical coronagraphic telescopes will obtain images of cool gas and ice giant exoplanets around nearby stars. The albedo spectra of exoplanets at planet-star separations larger than about 1 AU are dominated by reflected light to beyond 1
Ackerman   +58 more
core   +2 more sources

Variability of Known Exoplanet Host Stars Observed by TESS

open access: yesThe Astronomical Journal, 2023
Both direct and indirect methods of exoplanet detection rely upon detailed knowledge of the potential host stars. Such stellar characterization allows for accurate extraction of planetary properties, as well as contributing to our overall understanding ...
Emilie R. Simpson   +5 more
doaj   +1 more source

Investigation of Kepler Objects of Interest Stellar Parameters from Observed Transit Durations [PDF]

open access: yes, 2013
The Kepler mission discovery of candidate transiting exoplanets (KOIs) enables a plethora of ensemble analysis of the architecture and properties of exoplanetary systems.
Bilinski, Christopher   +2 more
core   +2 more sources

The LCES HIRES/Keck Precision Radial Velocity Exoplanet Survey [PDF]

open access: yes, 2017
We describe a 20 year survey carried out by the Lick-Carnegie Exoplanet Survey Team (LCES), using precision radial velocities from HIRES on the Keck I telescope to find and characterize extrasolar planetary systems orbiting nearby F, G, K, and M dwarf ...
P. Butler   +10 more
semanticscholar   +1 more source

Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions

open access: yesThe Astronomical Journal, 2023
Directly imaging temperate rocky planets orbiting nearby, Sun-like stars with a 6 m class IR/O/UV space telescope, recently dubbed the Habitable Worlds Observatory, is a high-priority goal of the Astro2020 Decadal Survey.
Katherine Laliotis   +24 more
doaj   +1 more source

Asteroseismology of Exoplanet Host Stars

open access: yes, 2015
Asteroseismology is among the most powerful observational tools to determine fundamental properties of stars. Space-based photometry has recently enabled the systematic detection of oscillations in exoplanet host stars, allowing a combination of ...
Huber, Daniel
core   +1 more source

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