Detecting Extrasolar Planetary Transits Through Photoelectric Photometry Violet Poole Dr. Matthew...
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Transcript of Detecting Extrasolar Planetary Transits Through Photoelectric Photometry Violet Poole Dr. Matthew...
![Page 1: Detecting Extrasolar Planetary Transits Through Photoelectric Photometry Violet Poole Dr. Matthew Beaky.](https://reader035.fdocuments.in/reader035/viewer/2022062417/5514cd5e550346935c8b4c59/html5/thumbnails/1.jpg)
Detecting Extrasolar Planetary Transits Through Photoelectric Photometry
Violet PooleDr. Matthew Beaky
![Page 2: Detecting Extrasolar Planetary Transits Through Photoelectric Photometry Violet Poole Dr. Matthew Beaky.](https://reader035.fdocuments.in/reader035/viewer/2022062417/5514cd5e550346935c8b4c59/html5/thumbnails/2.jpg)
Most extrasolar planets have been detected by the radial velocity method
i
Minimum massM sin i
Astrophysical Journal 587, p. 423
![Page 3: Detecting Extrasolar Planetary Transits Through Photoelectric Photometry Violet Poole Dr. Matthew Beaky.](https://reader035.fdocuments.in/reader035/viewer/2022062417/5514cd5e550346935c8b4c59/html5/thumbnails/3.jpg)
An extrasolar planetary transit is seen from Earth as a dimming of light from the parent star € Δmtime
Inclination angle (i) Planet mass DensityComposition{
![Page 4: Detecting Extrasolar Planetary Transits Through Photoelectric Photometry Violet Poole Dr. Matthew Beaky.](https://reader035.fdocuments.in/reader035/viewer/2022062417/5514cd5e550346935c8b4c59/html5/thumbnails/4.jpg)
Extrasolar planetary transit observations are usually made with CCD cameras
T. Castellano & G. Laughlin, Proceedings of the 21st IAPPP-WW Conf., 2002
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All observations were made at the Truman Observatory in Kirksville, Missouri
Meade LX200GPS14 inch SCT
Optec SSP3-APhotoelectric Photometer
Δm = –2.5 log (Var / Comp)
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Making photometric measurements of a non-variable star established system precision
HD195019
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A partial transit of HD209458 was observed
![Page 8: Detecting Extrasolar Planetary Transits Through Photoelectric Photometry Violet Poole Dr. Matthew Beaky.](https://reader035.fdocuments.in/reader035/viewer/2022062417/5514cd5e550346935c8b4c59/html5/thumbnails/8.jpg)
We made photometric observations of HD149026, a planetary transit candidate…
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…but we were unsuccessful in our effort to observe a second transit
![Page 10: Detecting Extrasolar Planetary Transits Through Photoelectric Photometry Violet Poole Dr. Matthew Beaky.](https://reader035.fdocuments.in/reader035/viewer/2022062417/5514cd5e550346935c8b4c59/html5/thumbnails/10.jpg)
We later learned that HD149026 had in fact been observed to transit
N2K ConsortiumAstrophysical Journal 633, p. 465
Δm ~ 0.003
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Photoelectric photometry is a valid alternative method for observing extrasolar planetary transits
Transit Search: www.transitsearch.org
Transit Timing