A two-parameter family of double-power-law biorthonormal potential-density expansions
A two-parameter family of double-power-law biorthonormal potential-density expansions
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双幂律双正交势密度展开的双参数族
DOI:
10.1093/mnras/sty1038
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发表时间:
2018
影响因子:
4.8
通讯作者:
Lilley E
中科院分区:
文献类型:
--
作者:
Lilley E
We present a two-parameter family of biorthonormal double-power-law potential-density expansions. Both the potential and density are given in a closed analytic form and may be rapidly computed via recurrence relations. We show that this family encompasses all the known analytic biorthonormal expansions: the Zhao expansions (themselves generalizations of ones found earlier by Hernquist & Ostriker and by Clutton-Brock) and the recently discovered Lilley et al. expansion. Our new two-parameter family includes expansions based around many familiar spherical density profiles as zeroth-order models, including the γ models and the Jaffe model. It also contains a basis expansion that reproduces the famous Navarro–Frenk–White (NFW) profile at zeroth order. The new basis expansions have been found via a systematic methodology which has wide applications in finding other new expansions. In the process, we also uncovered a novel integral transform solution to Poisson’s equation.
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DOI:
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发表时间:
1998
期刊:
影响因子:
--
作者:
M. Weinberg
通讯作者:
M. Weinberg
DOI:
--
发表时间:
1973
期刊:
影响因子:
--
作者:
M. Clutton
通讯作者:
M. Clutton
DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
A. Fridman;V. L. Poliachenko
通讯作者:
V. L. Poliachenko
影响因子:
4.8
作者:
Lilley E
通讯作者:
Lilley E
DOI:
10.1111/j.1365-2966.2011.19222.x
发表时间:
2010
影响因子:
4.8
作者:
B. Lowing;A. Jenkins;V. Eke;C. Frenk
通讯作者:
C. Frenk