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6. An Astrometric Study of Van Maanen'S Star

Published online by Cambridge University Press:  14 August 2015

P. van de Kamp
P. van de Kamp*
Affiliation:
Swarthmore College, Swarthmore, Pa., U.S.A.

Extract

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Van Maanen's star (1950: 0h46.m5, + 5°.09′) is a white dwarf (visual magnitude 12.4, spectrum DF) with a proper motion of 2″.95 in 155°.5 and parallax 0″.234. An early determination of radial velocity yielded +238 km/sec (Adams and Joy, 1926). It was suggested by Russell and Atkinson (1931) that van Maanen's star might show a very large Einstein shift of at least +700 km/sec. Oort (1932) pointed out that the observed value of +238 km/sec is incompatible with the theory of galactic rotation: this would support the Einstein shift interpretation.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 42: White Dwarfs , 1971 , pp. 32 - 34
Copyright
Copyright © Reidel 1971 

References

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