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COSMIC/source/COSMIC_v3_coordinates.py

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+"""
+* COSMIC - COORDINATES
+* Version 3
+@ Yaël Moussouni
+@ Unistra, P&E, MSc1-MoFP
+@ Observatory of Strasbourg (intern)
+"""
+
+import numpy as np
+import amuse.units.units as u_amuse
+import astropy.units as u_astropy
+
+import astropy.coordinates as c
+
+def xyz2radecdist(stars):
+    X = stars.x.value_in(u_amuse.pc)
+    Y = stars.y.value_in(u_amuse.pc)    
+    Z = stars.z.value_in(u_amuse.pc)
+    Galactocentric = c.SkyCoord(x = X * u_astropy.pc, y = Y * u_astropy.pc, z = Z * u_astropy.pc, frame=c.Galactocentric)
+    ICRS = Galactocentric.transform_to(c.ICRS)
+    RA = ICRS.ra.deg
+    DEC = ICRS.dec.deg
+    DIST = ICRS.distance.pc
+    stars.ra = RA | u_amuse.deg
+    stars.dec = DEC | u_amuse.deg
+    stars.dist = DIST | u_amuse.pc
+    return stars
+