Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1779869 | New Astronomy | 2006 | 5 Pages |
Abstract
In this paper, we investigate the possibility of measuring the general relativistic gravitoelectric correction P(GE) to the orbital period P of the transitting exoplanet HD 209458b 'Osiris'. It turns out that the predicted magnitude of such an effect is â¼0.1Â s, while the most recent determinations of the orbital period of HD 209458b with the photometric transit method are accurate to â¼0.01Â s. It turns out that the major limiting factor is the error in the measurement of the projected semiamplitude of the star's radial velocity KM. Indeed, it affects the determination of the mass m of the planet which, in turn, induces a systematic error in the Keplerian period P(0) of â¼8Â s. However, the present situation may change if future 1-2 orders of magnitude improvements in the Doppler spectroscopy technique will occur.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Astronomy and Astrophysics
Authors
L. Iorio,