Masses and luminosities for the spectroscopic/speckle interferometric binary 12 Persei

Details Masses and luminosities for the spectroscopic/speckle interferometric binary 12 Persei Masses and luminosities for the spectroscopic/speckle interferometric binary 12 Persei

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...223..526m&link_type=abstract

Astrophysical Journal, Part 1, vol. 223, July 15, 1978, p. 526-529.

Astronomy and Astrophysics

Astrophysics

26

Binary Stars, Interferometry, Speckle Patterns, Stellar Luminosity, Stellar Mass, Stellar Spectrophotometry, Astronomical Spectroscopy, Bolometers, Data Correlation, Least Squares Method, Position (Location), Stellar Magnitude

Scientific paper

Speckle interferometric observations of the double-lined 331-day spectroscopic binary 12 Per are combined with the spectroscopic elements for a preliminary determination of the masses of both components and the distance to the system. Five speckle observations of angular separation and position angle were used to determine the additional elements: semimajor axis of 0.057 + or - 0.003 arcsec, inclination of 123.0 + or - 2.0 deg, and 227.9 + or - 1.5 deg for the longitude of the ascending mode. The values lead to masses of 1.25 + or - 0.20 (primary) and 1.08 + or - 0.17 (secondary) and a parallax of 0.046 + or - 0.002 arcsec. Adopting Colacevich's (1941) estimate of an apparent-magnitude difference of approximately 0.3 then gives absolute visual magnitudes of 3.8 + or - 0.1 for the primary and 4.1 + or - 0.1 for the secondary. The two stars are found to have their expected locations on the empirical mass-luminosity relation.

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