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Title:
Determination of the component masses and inclination of a binary system containing a pulsar from relativistic effects
Authors:
BRUMBERG, V. A.; ZELDOVICH, IA. B.; NOVIKOV, I. D.; SHAKURA, N. I.
Affiliation:
AA(Akademiia Nauk SSSR, Institut Teoreticheskoi Astronomii, Leningrad, USSR) AB(Akademiia Nauk SSSR, Institut Prikladnoi Matematiki, Moscow, USSR) AC(Akademiia Nauk SSSR, Institut Kosmicheskikh Issledovanii, Moscow, USSR) AD(Moskovskii Gosudarstvennyi Universitet, Moscow, USSR)
Journal:
Pis'ma v Astronomicheskii Zhurnal, vol. 1, Jan. 1975, p. 5-9. In Russian.
Publication Date:
01/1975
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
BINARY STARS, ORBITAL ELEMENTS, PULSARS, RELATIVISTIC EFFECTS, STELLAR MASS, APSIDES, DOPPLER EFFECT, FREQUENCY SHIFT, INCLINATION
Bibliographic Code:
1975SvAL....1Q...5B

Abstract

It is shown that relativistic changes in pulsar period can be used to determine the masses of the components and the angle of inclination of the orbital plane of a binary system. The total mass of the system can be determined from the relativistic precession of the line of apsides, but the gravitational redshift and the quadratic Doppler effect must be taken into account to determine the masses of the pulsar and the companion star separately. It is noted that the variable part of the latter effects is proportional to one of the velocity components of the pulsar's orbital motion, and that at least two series of observations are required for calculating the different positions of the line of apsides. Corresponding formulas are presented, and changes are calculated in the orbital period of the binary system containing PSR 1913+16. 
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