Upload
joseph-pereira
View
222
Download
0
Tags:
Embed Size (px)
Citation preview
Detecting Extrasolar Planetary Transits Through Photoelectric Photometry
Violet PooleDr. Matthew Beaky
Most extrasolar planets have been detected by the radial velocity method
i
Minimum massM sin i
Astrophysical Journal 587, p. 423
An extrasolar planetary transit is seen from Earth as a dimming of light from the parent star € Δmtime
Inclination angle (i) Planet mass DensityComposition{
Extrasolar planetary transit observations are usually made with CCD cameras
T. Castellano & G. Laughlin, Proceedings of the 21st IAPPP-WW Conf., 2002
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)
Making photometric measurements of a non-variable star established system precision
HD195019
A partial transit of HD209458 was observed
We made photometric observations of HD149026, a planetary transit candidate…
…but we were unsuccessful in our effort to observe a second transit
We later learned that HD149026 had in fact been observed to transit
N2K ConsortiumAstrophysical Journal 633, p. 465
Δm ~ 0.003
Photoelectric photometry is a valid alternative method for observing extrasolar planetary transits
Transit Search: www.transitsearch.org
Transit Timing