The Angular Diameter and Effective Temperature of Zeta Puppis
1970; Oxford University Press; Volume: 150; Issue: 1 Linguagem: Inglês
10.1093/mnras/150.1.45
ISSN1365-2966
AutoresJohn Davis, D. Morton, L. R. Allen, Robert Brown,
Tópico(s)Astro and Planetary Science
ResumoObservations of the O5f star ζ Pup with the stellar intensity interferometer at Narrabri Observatory have shown it to have an angular diameter of |$({4}^{\prime{}\prime}\,\cdot3\,\pm \,0\cdot3)\,\times\,{10}^{-4}$| after correction for limb darkening. Combination of this result with photometric data and theoretical model atmospheres with ultra-violet line blanketing has yielded an effective temperature of |$31\,000\,\pm\,2500\,^{\circ} \text{K}$| . If ζ Pup is at a distance of 350 pc it has a radius of 16 R⊙ and a mass of about 26 M⊙ so that its surface gravity is |$2\,\cdot7\,\times\,{10}^{3}\,\text{cm}\,\text{s}^{-2}$| The rather low temperature and low ultra-violet flux suggest that ζ Pup is not typical of early type O stars.
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