Open AccessA new derivation of the ratio Q (wobble)/ Q μ (mantle)
Author(s) -
BenMenahem Ari
Publication year - 1982
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1982.tb04980.x
Subject(s) - sidereal time , speed wobble , mantle (geology) , geology , geodesy , earth's rotation , polar motion , physics , geophysics , classical mechanics , astrophysics
Summary An extension of the Love‐Larmor theory to a low‐loss unelastic earth model, leads to the surprisingly simple approximation where τ s = 447.4 sidereal day is the static wobble period, τ R = 306 sidereal day is the rigid‐earth wobble period and τ w = 433 sidereal day is the observed Chandler period. Q W , Q μ are the respective average Q values of the wobble and the Earth's mantle at τ W . The known numerical factor F is only slightly dependent on the Earth structure.