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Some Newfound Planets Are Something Else - Science News - 0 views

www.sciencenews.org/...und_planets_are_something_else

scibyte50 Kepler exoplanet

shared by Mars Base on 08 Jun 12 - No Cached
  • When the Kepler spacecraft finds a giant planet closely orbiting a star, there’s a one in three chance that it’s not really a planet at all.
  • according to a new study
  • results, posted June 5 on arXiv.org, suggest that 35 percent of candidate giants snuggled close to bright stars are impostors, known in the planet-hunting business as false-positives
  • ...9 more annotations...
  • Out of more than 2,300 possible planets, only 46 fell into that category
  • Eleven of these were already known planets. Santerne’s team confirmed nine more
  • The remaining 26 candidates included 13 unknowns, two failed brown dwarf stars, and 11 members of binary star systems
  • not everything that darkens a star is a planet
  • After distributing the unknowns according to the observed ratios of objects, the team arrived at the 35 percent false-positive rate.
  • scientists don’t consider it a serious flaw for Kepler
  • percentage is very low compared to all other transit programs
  • Short period transiting planets are exotic objects, we don’t expect them to be everywhere
  • The potential billion planets are more expected to be small, long-period planets. We didn’t kill those ones, fortunately
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