Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21912507l&link_type=abstract
American Astronomical Society, AAS Meeting #219, #125.07
Astronomy and Astrophysics
Astronomy
Scientific paper
Planet Hunters (http://www.planethunters.org), part of the Zooniverse collection of citizen science projects, enlists the general public to visually identify transits in the publicly released Kepler data via the World Wide Web. The human eye and brain are well suited to picking out most transits that cannot be detected in periodograms and are missed by the automated search algorithms. With over 53,000 volunteers examining the light curves on the Planet Hunters interface, we have the ability to visually inspect the entire public dataset for signatures of exoplanet transits. Planet Hunters is thus a novel and complementary technique to the automated transit detection algorithms, providing an independent assessment of the completeness of the Kepler exoplanet inventory.
For each of the 150,000 Kepler-monitored stars, approximately 10 users examine 30-day segments of the star's light curve, identifying potential transits. Planet Hunters classifications are processed through a pipeline which uses simulated transit light curves to assess the capabilities of individual volunteers. Weightings are assigned to individuals and an iterative process is used to converge on final classifications and identify planet candidates. We present the results from analyzing the first three quarters of Kepler observations ( 120 days of observations) and present planet candidates identified by Planet Hunters comparing to the Kepler team's published lists of planet candidates. In particular, we discuss the abundance of large planets (> 2 earth radii) on short period (< 15 days) orbits based on Planet Hunters detections.
Brewer James
Fischer Debra
Giguere Matt
Lintott Chris
Lynn Stuart
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