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Title: ON THE ROTATIONAL BEHAVIOR OF NEREID

Abstract

We have conducted a set of numerical simulations of the combined orbital and rotational motion of Neptune's moon Nereid to study its rotational behavior under the influence of gravitational torques from Neptune. Due to the high eccentricity of its orbit, and the fact that the gravitational torque from Neptune varies as r{sup -3}, Nereid experiences a large impulsive torque during each periapsis passage. If Nereid is a prolate body, then these kicks induce oscillations in the orientation of its spin axis that is seen to be a coning motion of modulating amplitude. We have proposed that these modulations may be responsible for the long-term photometric variability of Nereid as reported by Schaefer et al. and others.

Authors:
; ; ;  [1];  [2]
  1. Department of Physics, Miami University, Oxford, OH 45056 (United States)
  2. Department of Physics, University of Cincinnati, Cincinnati, OH 45221 (United States)
Publication Date:
OSTI Identifier:
21583076
Resource Type:
Journal Article
Journal Name:
Astronomical Journal (New York, N.Y. Online)
Additional Journal Information:
Journal Volume: 142; Journal Issue: 1; Other Information: DOI: 10.1088/0004-6256/142/1/1; Journal ID: ISSN 1538-3881
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COMPUTERIZED SIMULATION; MOON; NEPTUNE PLANET; ORBITS; SOLAR SYSTEM EVOLUTION; TORQUE; EVOLUTION; PLANETS; SATELLITES; SIMULATION

Citation Formats

Alexander, S. G., Hesselbrock, Andrew J., Wu Tiandan, Marshall, Megan D., and Abel, N. P., E-mail: alexansg@muohio.edu. ON THE ROTATIONAL BEHAVIOR OF NEREID. United States: N. p., 2011. Web. doi:10.1088/0004-6256/142/1/1.
Alexander, S. G., Hesselbrock, Andrew J., Wu Tiandan, Marshall, Megan D., & Abel, N. P., E-mail: alexansg@muohio.edu. ON THE ROTATIONAL BEHAVIOR OF NEREID. United States. doi:10.1088/0004-6256/142/1/1.
Alexander, S. G., Hesselbrock, Andrew J., Wu Tiandan, Marshall, Megan D., and Abel, N. P., E-mail: alexansg@muohio.edu. Fri . "ON THE ROTATIONAL BEHAVIOR OF NEREID". United States. doi:10.1088/0004-6256/142/1/1.
@article{osti_21583076,
title = {ON THE ROTATIONAL BEHAVIOR OF NEREID},
author = {Alexander, S. G. and Hesselbrock, Andrew J. and Wu Tiandan and Marshall, Megan D. and Abel, N. P., E-mail: alexansg@muohio.edu},
abstractNote = {We have conducted a set of numerical simulations of the combined orbital and rotational motion of Neptune's moon Nereid to study its rotational behavior under the influence of gravitational torques from Neptune. Due to the high eccentricity of its orbit, and the fact that the gravitational torque from Neptune varies as r{sup -3}, Nereid experiences a large impulsive torque during each periapsis passage. If Nereid is a prolate body, then these kicks induce oscillations in the orientation of its spin axis that is seen to be a coning motion of modulating amplitude. We have proposed that these modulations may be responsible for the long-term photometric variability of Nereid as reported by Schaefer et al. and others.},
doi = {10.1088/0004-6256/142/1/1},
journal = {Astronomical Journal (New York, N.Y. Online)},
issn = {1538-3881},
number = 1,
volume = 142,
place = {United States},
year = {2011},
month = {7}
}