Eccentric Planets & Transit Time Variation

Details Eccentric Planets & Transit Time Variation Eccentric Planets & Transit Time Variation

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009iaus..253..490k&link_type=abstract

Transiting Planets, Proceedings of the International Astronomical Union, IAU Symposium, Volume 253, p. 490-491

Astronomy and Astrophysics

Astronomy

Scientific paper

For an extrasolar planet on an eccentric orbit, the orbital velocity is constantly changing, even during a planetary transit. This changing orbital velocity will, in general, cause lightcurve assymetry. The asymmetry causes the mid-transit time to be slightly off-centre from the halfway point between transit ingress and egress. For GJ436b, we estimate that the mid-transit time is shifted by 20 seconds. In the case of a system experiencing secular changes, this difference will lead to a long period transit time variation (L-TTV) signal, under the typical definition of the mid-transit time. In this work, we describe the origins of the effect and evaluate it in the case of GJ436b experiencing hypothetical secular changes. We predict L-TTV could be used to map secular changes in such systems.

Affiliated with

Also associated with

No associations

Rating

Eccentric Planets & Transit Time Variation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Eccentric Planets & Transit Time Variation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eccentric Planets & Transit Time Variation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-918318