Extra-Solar Planetary Transits
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Transcript of Extra-Solar Planetary Transits
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J.J. ZanazziEd AndersonNorthern Arizona UniversityArizona Space Grant Consortium
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The first extra-solar planet that was discovered around a “sun-like star” was 51 Pegasi b
Was discovered by Michel Mayor and Didier Queloz using the radical velocity method
Many different methods for discovering extra-solar planets Radical Velocity Method(Redshift) Astrometry Extra-Solar Planetary Transits
Used Extra-Solar Planetary Transits
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Analyzed Photometric Data taken by Pr. Shliegh
Star 0 = GJ 437Star 1 = HIP 57103Star 2 = USNO-B1.0 1167-00204224Star 3=GSC 01984-02056Star 4=11:42:20.08 +26:49:43.20
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Verify or refute previous data
Went to the NURO Observatory to take photometric data of transiting planet and the suspicious comparison stars with Ed Anderson▪ Used Observatory’s 31 in. telescope
Took two control data sets, when planet was known to be not transiting, and one data set in which planet was transiting
Did differential photometry on stars’ magnitudes
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Used Image Reduction and Analysis Facility (IRAF) to analyze photometric data
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Dip in Magnitude Detected in the previous data is 200% greater than what other data has shown
“Transit” detected is a day long, when other data shows the transit to be one hour long
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Results Refute Previous Data
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Ed AndersonSharon ShlieghKathleen StigmonNASA Arizona Space Grant
ConsortiumPhysics and Astronomy Department
at Northern Arizona University