SIMBAD references

2008MNRAS.387L...1U - Mon. Not. R. Astron. Soc., 387, L1-L3 (2008/June-2)

Polaris B, an optical companion of the Polaris (αUMi) system: atmospheric parameters, chemical composition, distance and mass.


Abstract (from CDS):

We present an analysis of high-resolution spectroscopic observations of Polaris B, the optical companion of the Polaris Ab system. The star has a radial velocity of -16.6 to -18.9km/s, and a projected rotational velocity v sini =110 km/s. The derived atmospheric parameters are: Teff= 6900 K; logg =4.3; Vt= 2.5km/s. Polaris B has elemental abundances generally similar to those of the Cepheid Polaris A, although carbon, sodium and magnesium are close to the solar values. At a spectral type of F3 V Polaris B has a luminosity of 3.868L, an absolute magnitude of +3.30 mag, and a distance of 109.5 pc. The mass of the star is estimated to be 1.39 M, close to a mass of 1.38±0.61M for the recently resolved orbital period companion Polaris Ab observed by Evans et al.

Abstract Copyright: © 2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): stars: abundances - stars: individual: Polaris B

Simbad objects: 4

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