def new_particle_from_model(self,
internal_structure,
current_age,
key=None):
tmp_star = Particle(key=key)
tmp_star.mass = internal_structure["mass"]
tmp_star.radius = internal_structure["radius"]
tmp_star.type = "new particle from model"
return self.particles.add_particle(tmp_star)
def new_system(star_mass=1 | units.MSun,
star_radius=1 | units.RSun,
disk_minimum_radius=0.05 | units.AU,
disk_maximum_radius=10 | units.AU,
disk_mass=20 | MEarth,
accurancy=0.0001,
planet_density=3 | units.g / units.cm**3,
rng=None,
kepler=None):
central_particle = Particle()
central_particle.mass = star_mass
central_particle.position = (0, 0, 0) | units.AU
central_particle.velocity = (0, 0, 0) | units.kms
central_particle.radius = star_radius
central_particle.name = "star"
central_particle.type = "star"
central_particle.id = 0
if rng is None:
rng = numpy.random
converter = nbody_system.nbody_to_si(1 | units.MSun, 1 | units.AU)
if kepler is None:
kepler = Kepler(converter)
kepler.initialize_code()
m, r, f = new_planet_distribution(disk_minimum_radius, disk_maximum_radius,
disk_mass, accurancy)
planets = make_planets(central_particle,
m,
r,
density=planet_density,
phi=0,
theta=None,
kepler=kepler,
rng=rng)
planets.name = "planet"
planets.type = "planet"
for i in range(len(planets)):
planets[i].id = i
central_particle.planets = planets
kepler.stop()
p = Particles()
p.add_particle(central_particle)
return p
def get_moons_for_planet(planet, delta_JD=0. | units.day):
"""
The Earth's moon
as for JD = 2457099.500000000 = A.D. 2015-Mar-18 00:00:00.0000 (CT)
https://ssd.jpl.nasa.gov/?sat_elem
"""
data = numpy.array([tuple(entry) for entry in _lunar_data],
dtype=[('planet_name', 'S10'), ('name', 'S10'),
('mass', '<f8'), ('radius', '<f8'),
('semimajor_axis', '<f8'),
('eccentricity', '<f8'),
('argument_of_peri', '<f8'),
('mean_anomaly', '<f8'), ('inclination', '<f8'),
('longitude_oan', '<f8')])
moon_data = data[data['planet_name'] == planet.name.encode('UTF-8')]
print("Planet=", planet.name, "moon=", moon_data["name"])
moons = Particles()
if len(moon_data["name"]):
print(len(moon_data["name"]))
for moon in moon_data:
#Ignore the moon for now, because it's complicated
if planet.name == "EarthMoon":
planet.mass -= moon["mass"] * 1.e+16 | units.kg
planet.name = "Earth"
#print moon
r, v = get_position(planet.mass,
moon["mass"] * 1.e+16 | units.kg,
moon["eccentricity"],
moon["semimajor_axis"] | units.km,
numpy.deg2rad(moon["mean_anomaly"]),
numpy.deg2rad(moon["inclination"]),
numpy.deg2rad(moon["longitude_oan"]),
numpy.deg2rad(moon["argument_of_peri"]),
delta_t=delta_JD)
single_moon = Particle()
single_moon.type = "moon"
single_moon.name = moon["name"]
single_moon.mass = moon["mass"] * 1.e+16 | units.kg
single_moon.hostname = moon["planet_name"]
single_moon.radius = moon["radius"] | units.km
single_moon.position = r
single_moon.position += planet.position
single_moon.velocity = v
single_moon.velocity += planet.velocity
moons.add_particle(single_moon)
return moons
def get_moons_for_planet(planet, delta_JD=0.|units.day):
"""
The Earth's moon
as for JD = 2457099.500000000 = A.D. 2015-Mar-18 00:00:00.0000 (CT)
https://ssd.jpl.nasa.gov/?sat_elem
"""
data = numpy.array([tuple(entry) for entry in _lunar_data],
dtype=[('planet_name','S10'), ('name','S10'),
('mass','<f8'), ('radius','<f8'), ('semimajor_axis','<f8'),
('eccentricity','<f8'), ('argument_of_peri','<f8'),
('mean_anomaly','<f8'), ('inclination','<f8'), ('longitude_oan','<f8')])
moon_data = data[data['planet_name']==planet.name]
print "Planet=", planet.name, "moon=", moon_data["name"]
moons = Particles()
if len(moon_data["name"]):
print len(moon_data["name"])
for moon in moon_data:
#print moon
r, v = get_position(planet.mass,
moon["mass"] * 1.e+16 | units.kg,
moon["eccentricity"],
moon["semimajor_axis"]|units.km,
numpy.deg2rad(moon["mean_anomaly"]),
numpy.deg2rad(moon["inclination"]),
numpy.deg2rad(moon["longitude_oan"]),
numpy.deg2rad(moon["argument_of_peri"]),
delta_t=delta_JD)
single_moon = Particle()
single_moon.type = "moon"
single_moon.name = moon["name"]
single_moon.mass = moon["mass"] * 1.e+16 | units.kg
single_moon.hostname = moon["planet_name"]
single_moon.radius = moon["radius"] | units.km
single_moon.position = r
single_moon.position += planet.position
single_moon.velocity = v
single_moon.velocity += planet.velocity
moons.add_particle(single_moon)
return moons
def new_particle_from_model(self, internal_structure, current_age, key=None):
tmp_star = Particle(key=key)
tmp_star.mass = internal_structure["mass"]
tmp_star.radius = internal_structure["radius"]
tmp_star.type = "new particle from model" | units.string
return self.particles.add_particle(tmp_star)