Scaled models, scaled frequencies, and model fitting

Scaled models, scaled frequencies, and model fitting
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缩放模型、缩放频率和模型拟合

DOI:
10.1051/0004-6361/201527447
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发表时间:
2015
影响因子:
6.5
通讯作者:
Roxburgh I
Roxburgh I
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Roxburgh I

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证明了给定质量为M、半径为R、密度分布为ρ(x)[x=r/R]的星星模型,存在质量为Mk、半径为Rk、密度分布为ρk(x)=λρ(x)、频率为νkn =λ1/2νn的双参数模型族,其中λ、Rk/RA为标度因子.这些模型具有不同的内部结构,但都具有相同的值的分离比计算在给定的径向ordersn,并完全满足频率匹配算法的偏移函数确定的拟合过程的一部分。但它们在给定频率下不满足比例匹配,也不满足相移匹配。这说明在给定值下用比值拟合模型或频率匹配时可能会得到错误的结果。我给出的例子,从缩放模型和非缩放的进化模型。
I show that given a model star of massM, radiusR, and density profileρ(x) [x=r/R], there exists a two parameter family of models with massesMk, radiiRk, density profileρk(x) =λρ(x) and frequencies νknℓ=λ1/2νnℓ, whereλ,Rk/RAare scaling factors. These models have different internal structures, but all have the same value of separation ratios calculated at given radial ordersn, and all exactly satisfy a frequency matching algorithm with an offset function determined as part of the fitting procedure. But they do not satisfy ratio matching at given frequencies nor phase shift matching. This illustrates that erroneous results may be obtained when model fitting with ratios at givennvalues or frequency matching. I give examples from scaled models and from non scaled evolutionary models.
DOI: 10.1051/0004-6361/201425289
发表时间: 2014-06
影响因子: 6.5
作者:
I. Roxburgh
通讯作者: I. Roxburgh
DOI: 10.1051/0004-6361/201321333
发表时间: 2013
影响因子: 6.5
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通讯作者: Roxburgh I
OSCROX 恒星振荡代码
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
I. Roxburgh
通讯作者: I. Roxburgh