Angular momentum evolution in Dark Matter haloes Contreras, Padilla & Lagos 2017

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The following codes allowed to evolve the (specific) angular momentum 'J' ('j') of following the procedure presented in Contreras et al. 2017.

Any doubt or concern please do not hesitate in contacting me at [email protected]

To run the codes just run: python <name_of_the_file.py>

########################################### ChangeOfAngle.py

It changes the vector 'J' in an angle 'Angle' in a random direction.

########################################### ChangeOfDir.py

It changes the vector 'J' in an angle 'Angle'. For a large sample of vectors, the average change of direction of the vector will be 'DIR'.

########################################### Main_Table.py

It changes the vector 'J' in an angle 'Angle'. For a large sample of vectors, the average change of direction of the vector will be 'DIR'. The value of 'Angle' and the value of 'DIR' are calculated from the change of mass that affects the halo (dm/M), the change of Mc(z) in which this change of mass occurs (dlogMc) and the mass of the halo (M).

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j_modCT96.py

Gives the modulus of 'j' using as input the mass of the halo and the scale factor 'a' (equations 11-14 of Contreras et al. 2017)

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ChangeOfj_CT96.py

It changes the modulus of 'j' using as input the mass of the halo, the scale factor 'a', de change of mass of the halo and the change in 'a' following equation 15 of Contreras et al. 2017

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ChangeOfj_MC_Halo.py

Same as 'Main_Table.py' but calculate the change on the modulus of 'j' instead of its angle.