Revised Hipparcos data were released by van Leeuwen in 2007.In this article revised Hipparcos trigo-nometrical parallaxes are used to derive a period-luminosity zero-point in the optical V band.Adopting a fixed slope ...Revised Hipparcos data were released by van Leeuwen in 2007.In this article revised Hipparcos trigo-nometrical parallaxes are used to derive a period-luminosity zero-point in the optical V band.Adopting a fixed slope of -2.81 from the LMC,a zero-point value of ρ= -1.37±0.07 is derived based on the method by Feast and Catchpole(1997).This value yields an LMC distance modulus of 18.64 mag,which makes a minor change in H0 expected from Feast and Catchpole's result in 1997.展开更多
基金Supported by the National Natural Science Foundation of China (Grant No. 10673005)Foundation of the Chinese Academy of Sciences (Grant No. KJCX2-YW-T13)
文摘Revised Hipparcos data were released by van Leeuwen in 2007.In this article revised Hipparcos trigo-nometrical parallaxes are used to derive a period-luminosity zero-point in the optical V band.Adopting a fixed slope of -2.81 from the LMC,a zero-point value of ρ= -1.37±0.07 is derived based on the method by Feast and Catchpole(1997).This value yields an LMC distance modulus of 18.64 mag,which makes a minor change in H0 expected from Feast and Catchpole's result in 1997.
