标题： 一种新的哈勃参数测定方法 显示英文标题

标题： A New Method for the Determination of the Hubble Parameter

摘要： 巧合的是，霍夫利希与科霍洛夫提出的Ia型超新星（SNe Ia）近期理论模型中Mv(max)相对于(B-V)max的关系斜率与V versus B-V平面上消光线的斜率无法区分。 这一巧合使得人们能够确定一个与超新星起爆模型和星际消光均无关的Ia型超新星参数Mv*(max)。 通过哈穆伊等人观测到的Ia型超新星对Mv*(max)进行校准， 得到哈勃常数Ho的值在55至60 km s-1 Mpc-1之间。 这一结果与近期从室女座星团造父变星观测中获得的Ho值之间的差异表明，要么（1）造父变星距离尺度有误，要么（2）霍夫利希与科霍洛夫的Ia型超新星模型在极大亮度附近比实际亮约0.75个星等，要么（3）他们的模型在B-V波段比实际红约0.25个星等。 显示英文摘要

摘要： By chance, the slope of the Mv(max) versus (B-V)max relation for recent theoretical models of supernovae of Type Ia (SNe Ia) by Hoflich & Khokhlov is indistinguishable from the slope of a reddening line in the V versus B-V plane. This coincidence allows one to determine a parameter Mv*(max) for SNe Ia that is independent of both supernova detonation model and of interstellar reddening. Calibrating Mv*(max) with observations of SNe Ia by Hamuy et al. yields values of the Hubble parameter Ho in the range 55 - 60 km s-1 Mpc-1 . The discrepancy between this result, and values of Ho recently obtained from observations of Cepheids in the Virgo cluster, suggests that either (1) the Cepheid distance scale is wrong, (2) the SN Ia models of Hoflich & Khokhlov are too bright by ~ 0.75 mag near maximum light, or (3) their models are too red by \~ 0.25 mag in B-V.