“Call to Adopt a Nominal Set of Astrophysical Parameters and Constants to Improve the Accuracy of Fundamental Physical Properties of Stars” (PASP, 123, 976, [2011])
“Call to Adopt a Nominal Set of Astrophysical Parameters and Constants to Improve the Accuracy of Fundamental Physical Properties of Stars” (PASP, 123, 976, [2011])
复制标题
“呼吁采用一组标称天体物理参数和常数来提高恒星基本物理特性的准确性”（PASP, 123, 976, [2011]）
DOI：
10.1086/661258
复制
发表时间：
2011
影响因子：
3.5
通讯作者：
A. Prvsa
中科院分区：
文献类型：
--
作者：
P. Harmanec;A. Prvsa
随着对恒星和恒星系统的天文观测精度的提高，太阳质量、半径和亮度的数值稍有不同，以及基本物理常数的数值稍有不同，就会导致在确定基本物理性质时产生可测量的系统差异。采用一个常数和无误差的标称值，解决了光速不一致的等效问题。类似地，我们建议通过以下方法消除恒星参数的系统误差：(1)将太阳半径Rsun和光度Lsun替换为根据定义精确并以SI单位表示的标称值：1 RnomSun = 6.95508 x 10^8 m和1 LnomSun = 3.846 x 10^{26} W；(2)以Msun计算恒星质量，注意到产品G.Msun的测量误差比G小5个数量级；(3)利用推导值Msun(2010) = 1.988547 x 10^{30} kg和Tsun(2010) = 5779.57 K计算恒星质量和温度；(4)明确指出所使用的基本物理常数的参考值。我们将讨论这种模式转变的必要性和优点。
The increasing precision of astronomical observations of stars and stellar systems is gradually getting to a level where the use of slightly different values of the solar mass, radius and luminosity, as well as different values of fundamental physical constants, can lead to measurable systematic differences in the determination of basic physical properties. An equivalent issue with an inconsistent value of the speed of light was resolved by adopting a nominal value that is constant and has no error associated with it. Analogously, we suggest that the systematic error in stellar parameters may be eliminated by: (1) replacing the solar radius Rsun and luminosity Lsun by the nominal values that are by definition exact and expressed in SI units: 1 RnomSun = 6.95508 x 10^8 m and 1 LnomSun = 3.846 x 10^{26} W; (2) computing stellar masses in terms of Msun by noting that the measurement error of the product G.Msun is 5 orders of magnitude smaller than the error in G; (3) computing stellar masses and temperatures in SI units by using the derived values Msun(2010) = 1.988547 x 10^{30} kg and Tsun(2010) = 5779.57 K; and (4) clearly stating the reference for the values of the fundamental physical constants used. We discuss the need and demonstrate the advantages of such a paradigm shift.