Temperature, radius, and rotational velocity of Sirius B

Details Temperature, radius, and rotational velocity of Sirius B Temperature, radius, and rotational velocity of Sirius B

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98..922t&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, Oct. 1986, p. 922-926.

Astronomy and Astrophysics

Astronomy

6

Stellar Magnetic Fields, Stellar Mass, Stellar Rotation, Stellar Temperature, White Dwarf Stars, Angular Velocity, Radii

Scientific paper

The authors have derived the interrelationship between radius, rotational velocity, and effective temperature for Sirius B. They find that (1) the radii, 0.76 to 0.81 in hundredths of solar radii, predicted by Teff between 26,000K and 28,000K and a mass of 1.05 M_sun; places Sirius B somewhat above the Hamada-Salpeter mass-radius relation, by about 1 or 2 σ, (2) the rotational velocity of Sirius B is predicted to lie between 0 and 600 km s-1 (using 2 σ limits) and that only radii which place a white dwarf above the mass-radius line are allowed, and (3) in order to further limit the rotational velocity and the radius of Sirius B, better determinations of Teff and magnitude are needed.

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