[yt-users] Re: ROTATION CURVE PLOTS IN YT

From what I see from your mail, it looks like you're only listing the field_list. You can get a much more comprehensive list using 'ds.derived_field_list' which include e.g. the angular velocity. These fields aren't directly read from your output but are computed (or derived) quantities, such as the entropy, the dynamical time, … and you an use them for 1D profiles too. Corentin Cadiou

On 25 janv. 2018, at 16:16, Vadlamani Samhitha wrote:

Sorry, I didn't get what you meant.

...

On Thu, Jan 25, 2018 at 4:04 PM, Nathan Goldbaum wrote: You’re looking for the “particle_radius” field.

...

On Thu, Jan 25, 2018 at 9:01 AM Vadlamani Samhitha wrote: I see, How about obtaining the rotational curves for gas and matter separately and then adding them up? Would that be simpler (even if its an approximate) instead of considering the potential directly? I modelled stars and dark matter under particles and gas as fluid on the mesh and I have the following my fields_list: ( I am dealing with cartesian coordinates. So, I don't have the spherical coordinates in my fields_list)

" ('all', 'particle_extra_field_1') ('all', 'particle_extra_field_2') ('all', 'particle_extra_field_3') ('all', 'particle_extra_field_4') ('all', 'particle_extra_field_5') ('all', 'particle_identifier') ('all', 'particle_mass') ('all', 'particle_position_x') ('all', 'particle_position_y') ('all', 'particle_position_z') ('all', 'particle_refinement_level') ('all', 'particle_velocity_x') ('all', 'particle_velocity_y') ('all', 'particle_velocity_z') ('io', 'particle_extra_field_1') ('io', 'particle_extra_field_2') ('io', 'particle_extra_field_3') ('io', 'particle_extra_field_4') ('io', 'particle_extra_field_5') ('io', 'particle_identifier') ('io', 'particle_mass') ('io', 'particle_position_x') ('io', 'particle_position_y') ('io', 'particle_position_z') ('io', 'particle_refinement_level') ('io', 'particle_velocity_x') ('io', 'particle_velocity_y') ('io', 'particle_velocity_z') ('ramses', 'Density') ('ramses', 'Metallicity') ('ramses', 'Pressure') ('ramses', 'var6') ('ramses', 'x-velocity') ('ramses', 'y-velocity') ('ramses', 'z-velocity') "

So, I am thinking that the highlighted fields in the type 'all' could be used to compute circular velocity [sqrt(particle_velocity_x^2+particle_velocity_y^2)] and the radius [sqrt(particle_position_x^2+particle_position_y^2)] for particles. And for gas, 'ramses' fields could be used. However, I am not sure how to get the radius for the gas in this case. Would this be a right approach at all to begin with? _______________________________________________ yt-users mailing list -- yt-users@python.org To unsubscribe send an email to yt-users-leave@python.org

_______________________________________________ yt-users mailing list -- yt-users@python.org To unsubscribe send an email to yt-users-leave@python.org

_______________________________________________ yt-users mailing list -- yt-users@python.org To unsubscribe send an email to yt-users-leave@python.org