Class eos_tov_linear (o2scl)¶
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class o2scl::eos_tov_linear : public o2scl::eos_tov¶
Linear EOS \( P = c_s^2 (\varepsilon-\varepsilon_0) \).
This implements a linear EOS with a fixed speed of sound and a fixed energy density at zero pressure. This will also compute the baryon density, if one calls set_baryon_density() to set the baryon density at one fiducial energy density.
Given a fiducial baryon density \( n_{B,1} \) at some energy density \( \varepsilon_1 \) and pressure \( P_1 \), the baryon density is
\[ n_B = n_{B,1} \left[ \frac{\varepsilon(1+c_s^2) - c_s^2 \varepsilon_0 } {\varepsilon_1 (1 + c_s^2) - c_s^2 \varepsilon_0}\right]^{1/(1+c_s^2)} = n_{B,1} \left[ \frac{ \varepsilon + P } {\varepsilon_1 + P_1} \right]^{1/(1+c_s^2)} \]Note
Experimental
Public Functions
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eos_tov_linear()¶
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inline virtual ~eos_tov_linear()¶
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void set_cs2_eps0(double cs2_, double eps0_)¶
Set the sound speed and energy density at zero pressure.
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void set_baryon_density(double nb, double ed)¶
Set the baryon density.
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virtual double ed_from_pr(double pr)¶
From the pressure, return the energy density.
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virtual double pr_from_ed(double ed)¶
From the energy density, return the pressure.
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virtual double nb_from_ed(double ed)¶
From the energy density, return the baryon density.
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virtual double nb_from_pr(double pr)¶
From the pressure, return the baryon density.
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virtual double ed_from_nb(double nb)¶
From the baryon density, return the energy density.
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virtual double pr_from_nb(double nb)¶
From the baryon density, return the pressure.
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virtual void ed_nb_from_pr(double pr, double &ed, double &nb)¶
Given the pressure, produce the energy and number densities.
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eos_tov_linear()¶