Stellar Paths pp 119-133 | Cite as

Planetary Companions, Barnard’s Star

  • Peter Van De Kamp
Part of the Astrophysics and Space Science Library book series (ASSL, volume 85)

Abstract

(a) Introduction. A conventional observational distinction between stars and planets is the upper limit of 0.001ℳ⊙ for the most massive known planet, Jupiter, in our solar system and the lower limit 0.06ℳ⊙ for the mass of a bona fide star, e.g. Ross 614 B. While there are indications for the existence of objects of intermediate mass (Chapter 14), the potential discovery of as yet unseen planets orbiting stars other than the Sun remains of prime interest. At present it is not possible to ‘see’ a planet as large as Jupiter and shining by reflected light, even for the nearest star Alpha Centauri, though new techniques, beyond the conventional visual, may yield results in the not too distant future.

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Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1981

Authors and Affiliations

  • Peter Van De Kamp

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