Package enrichpy :: Module initialmassfunction

Module initialmassfunction

Implements stellar initial mass functions from Romano et al. 2005.

Full Citation: Romano D., Chiappini C., Matteucci F., Tosi M., 2005, A&A, 430, 491 (2005A&A...430..491R)

Functions

by_number(imf_mass_function)
Convert an IMF by mass to an IMF by number.

source code

broken_powerlaw_function(limits, coefficients, powers)
Return a function consisting of seperate powerlaws.

source code

imf_mass_Scalo86(mass)
Scalo 1986 stellar Initial Mass function by mass via Romano et al. (2005).

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imf_mass_Scalo98(mass)
Scalo 1998 stellar Initial Mass function by mass via Romano et al. (2005).

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imf_mass_Tinsley(mass)
Tinsley stellar Initial Mass function by mass via Romano et al. (2005).

source code

imf_mass_Kroupa(mass)
Kroupa stellar Initial Mass function by mass via Romano et al. (2005).

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imf_mass_Salpeter(mass)
Salpeter stellar Initial Mass function by mass via Romano et al. (2005).

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imf_mass_Chabrier(mass)
Chabrier stellar Initial Mass function by mass via Romano et al. (2005).

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imf_number_Chabrier(mass)
Chabrier stellar Initial Mass function by mass via Romano et al. (2005).

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test_plot_norm_imf(imf_function)
Plot and test the normalization of imf_function.

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test_plot_norm_all()

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Function Details

Return a function consisting of seperate powerlaws.

F(x) = a_i x^{p_i} for l_i < x < l_{i+1}

Parameters

limits: array (length n+1): boundaries of the specified powerlaws. Must be one greater in length than coefficents and powers. Specify -numpy.infty for the first limit or numpy.infty for the last limit for unbounded powerlaws.
coefficients: array (length n): values of the coefficient a_i
powers: array (length n): values of the powerlaw indices p_i

The returned function takes a single, one-dimensional array of values on which to operate.