Lines from disks
€Each
part of the disk has a particular velocity and brightness
€Line
profiles can be constructed from adding contributions from each part
€Conversely,
the brightness from each velocity zone can be determined from the
profile:
Doppler Tomography
€If
there is a relationship between the velocity and the location in the disk, (such as
Keplerian motion, or free-fall within the Roche lobe, then can map further
from
velocity to
spatial coordinates
Horne & Marsh (1986)