textbook example code: plot_RLOFtriples.pyΒΆ

[source code]

from matplotlib import pyplot
from amuse.lab import *
from prepare_figure import *
from distinct_colours import get_distinct
import numpy

set_printing_strategy("custom", #nbody_converter = converter,
                      preferred_units = [units.MSun, units.AU, units.Myr],
                      precision = 4, prefix = "", separator = " [", suffix = "]")

def maximum_stellar_radius():
    M = (10**numpy.arange(-0.2, 2, 0.05)) | units.MSun
    R = [] | units.AU
    for mi in M:
        stellar = SeBa()
        s = Particle()
        s.mass = mi
        stellar.particles.add_particle(s)
        rmax = 0|units.AU
        while stellar.particles[0].stellar_type<9|units.stellar_type:
            stellar.evolve_model()
            rmax = max(rmax, stellar.particles[0].radius)
        print "Time=", mi, stellar.particles[0].mass, stellar.model_time, stellar.particles[0].radius
        R.append(rmax)
    return M, R


#names = ["r$\tau$ CMa", "V* CQ Dra", "r$\xi$ Tau", "V* V1334 Cyg","V* DL Vir", "V* d Ser", "HD 97131", "KIC002856960"]
names = [r"$\tau$ CMa", "V* CQ Dra", r"$\xi$ Tau", "V* V1334 Cyg","V* DL Vir", "V* d Ser", "HD 97131", "KIC002856960"]
Mprim = [50.0, 6.3, 5.5, 4.4, 3.68, 2.5, 1.5, 0.76] | units.MSun
Rprim = [0.95, 2.64, 0.42, 3.99, 2.34, 0.62, 0.26, 0.12]| units.AU

colors = get_distinct(4)
figure = pyplot.figure(figsize=(16, 12))
ax = pyplot.gca()
ax.minorticks_on() # switch on the minor ticks
ax.locator_params(nbins=3)

M, Rmax = maximum_stellar_radius()

x_label = "m [$M_\odot$]"
y_label = "$r [AU]$"
pyplot.xlabel(x_label)
pyplot.ylabel(y_label)
pyplot.semilogx()
pyplot.semilogy()
pyplot.xlim(0.6, 100.0)
pyplot.ylim(0.07, 20.0)
pyplot.scatter(Mprim.value_in(units.MSun), Rprim.value_in(units.AU), c=colors[0], lw=0, s=300)
pyplot.plot(M.value_in(units.MSun), Rmax.value_in(units.AU), c=colors[1], lw=4)
for i in range(len(names)):
    pyplot.text(1.1*Mprim[i].value_in(units.MSun), 0.9*Rprim[i].value_in(units.AU), names[i], fontsize=20)
#pyplot.show()
pyplot.savefig("fig_RLOF_triples_R")

Keywords: python, amuse, astrophysics, matplotlib, pylab, example, codex (see how-to-search-examples)