SIMBAD references

2006ApJ...641L..57B - Astrophys. J., 641, L57-L60 (2006/April-2)

A stellar companion in the HD 189733 system with a known transiting extrasolar planet.

BAKOS G.A., PAL A., LATHAM D.W., NOYES R.W. and STEFANIK R.P.

Abstract (from CDS):

We show that the very close-by (19 pc) K0 star HD 189733, already found to be orbited by a transiting giant planet, is the primary of a double star system, with the secondary being a mid-M dwarf with projected separation of about 216 AU from the primary. This conclusion is based on astrometry, proper-motion and radial velocity measurements, spectral type determination, and photometry. We also detect differential proper motion of the secondary. The data appear consistent with the secondary's orbiting the primary in a clockwise orbit, lying nearly in the plane of the sky (i.e., nearly perpendicular to the orbital plane of the transiting planet), and with period of about 3200 years.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Close - Stars: Planetary Systems - stars: individual (HD 189733) - stars: individual (HD 189733B) - Stars: Low-Mass, Brown Dwarfs

Simbad objects: 9

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2019.12.11-04:24:41

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