Astronomy and Astrophysics – Astrophysics – Instrumentation and Methods for Astrophysics
Scientific paper
2010-12-07
2011 ApJ 728 66
Astronomy and Astrophysics
Astrophysics
Instrumentation and Methods for Astrophysics
15 pages, 2 figures. Accepted to ApJ
Scientific paper
10.1088/0004-637X/728/1/66
Starting with just the assumption of uniformly distributed orbital orientations, we derive expressions for the distributions of the Keplerian orbital elements as functions of arbitrary distributions of eccentricity and semi-major axis. We present methods for finding the probability density functions of the true anomaly, eccentric anomaly, orbital radius, and other parameters used in describing direct planetary observations. We also demonstrate the independence of the distribution of phase angle, which is highly significant in the study of direct searches, and present examples validating the derived expressions.
Cady Eric
Kasdin Jeremy N.
Savransky Dmitry
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