Galaxy_Models class which includes children Miyamaoto_Nagai_Hernquist and NFW_Hernquist
-
class
astro_traj.galaxy.Galaxy_Models(Mspiral, Mbulge, Mhalo, R_eff, h, rcut)[source]¶ Bases:
object
-
class
astro_traj.galaxy.Hernquist_NFW(Mspiral, Mbulge, Mhalo, R_eff, h, rcut)[source]¶ Bases:
astro_traj.galaxy.Galaxy_ModelsCURRENTLY PREFERRED POTENTIAL Galaxy with Hernquist potential for stellar component and dark matter potential and NFW profile for dark matter
- Paper References:
- Hernquist 1990: http://adsabs.harvard.edu/abs/1990ApJ…356..359H
- Ubulge is as in equation 5 in that paper
- Navarro, Frenk, White 1996: http://adsabs.harvard.edu/abs/1996ApJ…462..563N
- Uhalo corresponds to density profile in equation 3 in that paper. For explicit equation for this potential see, say, Naray et al 2009 Equation 1 (http://iopscience.iop.org/article/10.1088/0004-637X/692/2/1321/meta)
Methods
Ubulge(r)Bulge contribution to potential divided by system mass Uhalo(r)Halo contribution to potential divided by system mass Vdot(time, COORD)Vdot calculation using gradients of Uhalo and Ubulge bulge(r_i, r)gradient of Ubulge halo(r_i, r)gradient of Uhalo
-
class
astro_traj.galaxy.Miyamoto_Nagai_NFW(Mspiral, Mbulge, Mhalo, R_eff, h, rcut)[source]¶ Bases:
astro_traj.galaxy.Galaxy_ModelsDEVELOPMENT DOES NOT WORK Spiral Galaxy with disk and bulge potential from Miyamoto & Nagai 1975 and NFW profile for dark matter NOTE: This potential model is not working yet. We only have 1 measurement for the stellar mass component, not a separate bulge and disk mass Paper References:
- Miyamoto and Nagai 1975: http://adsabs.harvard.edu/abs/1975PASJ…27..533M
- Udisk, Ubulge are as in Equation 4 in that paper
- Navarro, Frenk, White 1996: http://adsabs.harvard.edu/abs/1996ApJ…462..563N
- Uhalo corresponds to density profile in equation 3 in that paper. For explicit equation for this potential see, say, Naray et al 2009 Equation 1 (http://iopscience.iop.org/article/10.1088/0004-637X/692/2/1321/meta)
Methods
Ubulge(r)Bulge contribution to potential divided by system mass Udisk(r, z)Disk contribution to potential divided by system mass Uhalo(r)Halo contribution to potential divided by system mass Vdot(time, COORD)Vdot calculation using gradients of Ubulge, Udisk, and Uhalo
-
class
astro_traj.galaxy.Belczynski_2002(Mspiral, Mbulge, Mhalo, R_eff, h, rcut)[source]¶ Bases:
astro_traj.galaxy.Galaxy_ModelsGalaxy with Hernquist potential for stellar component and dark matter potential from Belczynski 2002
- Paper References:
- Hernquist 1990: http://adsabs.harvard.edu/abs/1990ApJ…356..359H
- Ubulge is as in equation 5 in that paper
- Belzcynski et al 2002: http://iopscience.iop.org/article/10.1086/339860/meta
- Uhalo is as in equation 6 in that paper with cutoff at rcut such that Uhalo goes like 1/r for r>rcut
Methods
Ubulge(r)Bulge contribution to potential divided by system mass Uhalo(r)Halo contribution to potential divided by system mass Vdot(time, COORD)Vdot calculation using gradients of Uhalo and Ubulge bulge(r_i, r)gradient of Ubulge halo(r_i, r)gradient of Uhalo