vcdisk.vcdisk_thinexp

vcdisk.vcdisk_thinexp(r, md, rd)

Circular velocity of an infinitely thin exponential disk. See [Freeman70], Eq. (10).

Parameters

• r (float or list or numpy.ndarray) – radii in \(\rm kpc\).

• md (float) – disk mass in \(\rm M_\odot\).

• rd (float) – exponential scale-length of the disk in \(\rm kpc\)

Returns

1-D array (same shape as r) of the circular velocities in \(\rm km/s\).

Return type

float or numpy.ndarray

References

Freeman70

Freeman, 1970, ApJ, 160, 811. On the Disks of Spiral and S0 Galaxies. https://ui.adsabs.harvard.edu/abs/1970ApJ…160..811F/