SIMBAD references

2013ApJ...762L...8T - Astrophys. J., 762, L8 (2013/January-1)

The pulsation mode of the cepheid Polaris.

TURNER D.G., KOVTYUKH V.V., USENKO I.A. and GORLOVA N.I.

Abstract (from CDS):

A previously derived photometric parallax of 10.10±0.20 mas, d = 99 ±2 pc, is confirmed for Polaris by a spectroscopic parallax derived using line ratios in high dispersion spectra for the Cepheid. The resulting estimates for the mean luminosity of < MV > = -3.07±0.01 s.e., average effective temperature of < Teff > = 6025±1 K s.e., and intrinsic color of ( < B > - < V > )0= +0.56±0.01 s.e., which match values obtained previously from the photometric parallax for a space reddening of E_ B - V_= 0.02±0.01, are consistent with fundamental mode pulsation for Polaris and a first crossing of the instability strip, as also argued by its rapid rate of period increase. The systematically smaller Hipparcos parallax for Polaris appears discrepant by comparison.

Abstract Copyright:

Journal keyword(s): stars: distances - stars: fundamental parameters - stars: individual: Polaris - stars: variables: Cepheids

Simbad objects: 6

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2021.06.17-23:03:20

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