Open AccessPrecision measuring of velocities via the relativistic Doppler effect
Author(s) -
L. M. Ozernoy
Publication year - 1997
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-8711
pISSN - 0035-8711
DOI - 10.1093/mnras/291.4.l63
Subject(s) - physics , doppler effect , radial velocity , orbital elements , measure (data warehouse) , binary number , orbital motion , orbital speed , orbit (dynamics) , orbital mechanics , orbital inclination , binary star , astrophysics , computational physics , classical mechanics , astronomy , satellite , stars , arithmetic , mathematics , engineering , database , computer science , angular momentum , aerospace engineering
Just as the ordinary Doppler effect serves as a tool to measure radialvelocities of celestial objects, so can the relativistic Doppler effect beimplemented to measure a combination of radial and transverse velocities byusing recent improvements in observing techniques. A key element that makes afurther use of this combination feasible is the periodicity in changes of theorbital velocity direction for the source. Two cases are considered: (i) abinary star; and (ii) a solitary star with the planetary companion. It is shownthat, in case (i), several precision Doppler measurements employing the gasabsorption cell technique would determine both the total orbital velocity andthe inclination angle of the binary orbit disentangled from the peculiarvelocity of the system. The necessary condition for that is the measured, atleast with a modest precision, proper motion and distance to the system.Comment: 6 pages, TEX, uses mn.sty, mn.te
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