On the use of the ratio of small to large separations in asteroseismic model fitting

On the use of the ratio of small to large separations in asteroseismic model fitting
复制标题

星震模型拟合中小距与大距比的应用

DOI:
10.1051/0004-6361/201321333
复制
发表时间:
2013
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

文献摘要

参考文献

被引文献

相似文献

我们的目的是表明,通过在同一径向阶上寻找观测和模型分离比的最佳拟合来进行模型拟合在原则上是不正确的,并表明正确的方法是将插值的模型比率与观测频率进行比较。方法比较不同内部结构和外层结构的模型,将分离比与相移差联系起来,利用分离比进行模型拟合实验,将相移差与内部相移联系起来。结果表明,内部结构相同但外层不同的恒星模型在相同径向阶数下的分离比不相同,但在相同频率下的插值计算是相同的。分离比跟踪相移差作为一个函数的频率,而不是经常,它是相移差是由内部结构决定的。我们给出了模型拟合的例子,其中相同值的比率一致,但模型具有不同的内部结构,并且当插值到相同频率时比率一致,并且模型具有相同的内部结构。正确的步骤是将观测到的比率与插值到观测频率的模型值进行比较。
AimsWe aim to show that model fitting by searching for a best fit of observed and model separation ratios at the same radial ordersnis in principle incorrect, and to show that a correct procedure is to compare the model ratios interpolated to the observed frequencies.MethodsWe compare models with different interior structures and outer layers, relate the separation ratios to phase shift differences, conduct model fitting experiments using separation ratios, and relate phase shift differences to internal phase shifts.ResultsWe show that the separation ratios of stellar models with the same interior structure, but different outer layers, are not the same when compared at the same radial ordern, but are the same when evaluated at the same frequencies by interpolation. The separation ratios trace the phase shift differences as a function of frequency, not ofn, and it is the phase shift differences which are determined by the interior structure. We give examples from model fitting where the ratios at the samenvalues agree but the models have different interior structure, and where the ratios agree when interpolated to the same frequencies and the models have the same interior structure. The correct procedure is to compare observed ratios with model values interpolated to the observed frequencies.
DOI: 10.1051/0004-6361/201218948
发表时间: 2012-04
影响因子: 6.5
作者:
T. Appourchaux;W. Chaplin;R. García;M. Gruberbauer;G. Verner;H. M. Antia;O. Benomar;T. Campante;G. Davies;S. Deheuvels;R. Handberg;S. Hekker;R. Howe;C. R'egulo;D. Salabert;T. Bedding;T. White;J. Ballot;S. Mathur;V. S. Aguirre;Y. Elsworth;S. Basu;R. Gilliland;J. Christensen-Dalsgaard;H. Kjeldsen;K. Uddin;Martin C. Stumpe;T. Barclay
通讯作者: T. Appourchaux;W. Chaplin;R. García;M. Gruberbauer;G. Verner;H. M. Antia;O. Benomar;T. Campante;G. Davies;S. Deheuvels;R. Handberg;S. Hekker;R. Howe;C. R'egulo;D. Salabert;T. Bedding;T. White;J. Ballot;S. Mathur;V. S. Aguirre;Y. Elsworth;S. Basu;R. Gilliland;J. Christensen-Dalsgaard;H. Kjeldsen;K. Uddin;Martin C. Stumpe;T. Barclay
DOI: --
发表时间: 2007
期刊:
影响因子: --
作者:
R. Scuflaire;S. Théado;J. Montalban;A. Miglio;P. Bourge;M. Godart;A. Thoul;A. Noels
通讯作者: A. Noels
DOI: --
发表时间: 1996
期刊:
影响因子: --
作者:
I. Roxburgh;S. Vorontsov
通讯作者: S. Vorontsov
DOI: --
发表时间: 2007
期刊:
影响因子: --
作者:
R. Scuflaire;J. Montalbán;S. Théado;P.;A. Miglio;M. Godart;A. Thoul;A. Noels
通讯作者: A. Noels
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