The decay time of a satellite galaxy

Details The decay time of a satellite galaxy The decay time of a satellite galaxy

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.149..115n&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 149, no. 1, Nov. 1988, p. 115-119.

Astronomy and Astrophysics

Astrophysics

Astronomical Models, Decay Rates, Galactic Evolution, Approximation, Friction Drag, Galactic Clusters, Prediction Analysis Techniques, Stellar Motions

Scientific paper

Impulsive and adiabatic approximations for the merger times of a satellite galaxy moving on the periphery of the primary galaxy are considered. The form of Alladin and Parathasarathy (1978) is employed for the merger time under the impulsive approximation. If the satellite galaxy is modeled as a point souce, it is demonstrated that these merger times reduce to the decay time predicted by Chandrasekhar's (1943) formula for dynamical friction.

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