Orbit Code
- exception bagle.orbits.EccAnomalyError(message)
- bagle.orbits.a_to_P(mass, a)
Goes from semimajor axis in AU to period in years
- Parameters:
- mass: float or array-like
Primary object mass in Msun.
- a: float or array-like
Semimajor axis in AU.
- Returns:
- period: float or array-like
Orbital period in years.
- bagle.orbits.add_mult_positions(companions, ss_pos, logAge, add_velocities=False)
Adds x and y positions of multiple companions by transforming keplerian parameters to xyz in AU using code origially from gcworks and random initial times. Then adding them to the random posiiton of the primary object.
- Parameters:
- ss_pos: astropy table
Star system table with positions added with add_positions()
- companion: astropy table
Companion table without positions
- logAge: float or int
Log of age of cluster with age in years
- Returns:
- companion_temp: astropy table
Companion table with positions added
- bagle.orbits.add_positions(ss)
Adds x and y positions randomly in a box of length and width 40000 AU for each system.
- Parameters:
- ss: astropy table
Star system table without positions
- Returns:
- ss_temp: astropy table
Star system table with positions added
- bagle.orbits.distance_to_center_of_mass(ss_pos, companions_pos)
Adds extra column to star system and companions table with x and y distance to the center of mass in AU. Assumes hierarchical triples (two closest stars orbit their center of mass and triple orbits them) and no quads+.
- Parameters:
- ss_pos: astropy table
Star system table with positions added with add_positions()
- companion_pos: astropy table
Companion table with positions added with add_mult_positions()
- bagle.orbits.plot_companion_orbit(ss, companions_pos, logAge, t0=None, system=None)
Plots the orbit of one system assuming the primary object is at (0,0). By default random companion and initial time.
- Parameters:
- ss: astropy table
Star system table (does not matter if it has positions or not)
- companion_pos: astropy table
Companion table with positions added with add_mult_positions()
- logAge: float or int
Log of age of cluster with age in years
- t0: float or int, optional
Initial time of creation of the system in years. Default random.
- system: int, optional
Index of desired companion in companion_pos table. Default random.
- bagle.orbits.plot_projected_cluster(ss_pos, companions_pos)
Plots projected cluster with lines between companions and primary stars
- Parameters:
- ss_pos: astropy table
Star system table with positions added with add_positions()
- companion_pos: astropy table
Companion table with positions added with add_mult_positions()