Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-08-02
Astronomy and Astrophysics
Astrophysics
6 pages, 3 figures, 1 table
Scientific paper
10.1111/j.1745-3933.2008.00426.x
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 V_r of -16.6km/s to -18.9km/s, and a projected rotational velocity vsini=110 km/s. The derived atmospheric parameters are: Teff=6900K; logg=4.3; V_t=2.5km/s. Polaris B has elemental abundances generally similar to those of the Cepheid Polaris A (Usenko et al. 2005a), although carbon, sodium and magnesium are close to the solar values. At a spectral type of F3V Polaris B has a luminosity of 3.868L_sun, an absolute magnitude of +3.30mag, and a distance of 109.5pc. The mass of the star is estimated to be 1.39M_sun, close to a mass of 1.38+/-0.61M_sun for the recently-resolved orbital periods companion Polaris Ab observed by Evans et al. (2007).
Klochkova Valentina
Usenko Igor
No associations
LandOfFree
Polaris B, an optical companion of Polaris (alpha UMi) system: atmospheric parameters, chemical composition, distance and mass 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 Polaris B, an optical companion of Polaris (alpha UMi) system: atmospheric parameters, chemical composition, distance and mass, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polaris B, an optical companion of Polaris (alpha UMi) system: atmospheric parameters, chemical composition, distance and mass will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-245094