The nearby binary Gliese 866 A/B - Orbit, masses, temperature, and composition

Details The nearby binary Gliese 866 A/B - Orbit, masses, temperature, and composition The nearby binary Gliese 866 A/B - Orbit, masses, temperature, and composition

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...236..399l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 236, no. 2, Sept. 1990, p. 399-408.

Astronomy and Astrophysics

Astrophysics

25

Binary Stars, M Stars, Stellar Composition, Stellar Mass, Stellar Orbits, Stellar Temperature, Dwarf Stars, Hertzsprung-Russell Diagram, Speckle Interferometry, Stellar Atmospheres, Stellar Luminosity, Stellar Spectra

Scientific paper

The relative orbit of the nearby M dwarf binary Gliese 866 has been determined from IR speckle interferometric observations. The true semimajor axis of 0.36 + or - 0.01 arcsec corresponds, for the distance of 3.4 pc and the period of 2.20 + or - 0.02 years, to a system mass of 0.38 + or - 0.02 solar masses. This is higher than expected on the basis of the systems's luminosity. The brightness ratio of the components is virtually constant at 0.56 + or - 0.04 in the near-IR, suggesting that both are of nearly the same spectral type. Comparison of coude spectra with newly developed model atmospheres for cool dwarf stars indicates element abundances close to solar values and effective temperatures of 2900 + or - 100 K for the primary and 2500-2750 K for the companion. For this system therefore all important physical parameters are determined with good reliability.

Affiliated with

Also associated with

No associations

Rating

The nearby binary Gliese 866 A/B - Orbit, masses, temperature, and composition does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The nearby binary Gliese 866 A/B - Orbit, masses, temperature, and composition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The nearby binary Gliese 866 A/B - Orbit, masses, temperature, and composition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1399923