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| Paper: |
Emission line eclipse mapping of velocity fields in dwarf nova accretion discs |
| Volume: |
261, The Physics of Cataclysmic Variables and Related Objects |
| Page: |
501 |
| Authors: |
Makita, M.; Mineshige, S. |
| Abstract: |
We propose a new method, emission-line eclipse mapping, to map the velocity fields in an accretion disc. We apply the usual eclipse mapping technique to the light curves at each of 12-24 wavelengths across the line center to map the region with same line-of-sight velocity, from which we are able to plot the rotational velocity as a function of radius on the assumption of axisymmetric disc. We calculate time changes of the emission line profiles, assuming Keplerian rotation fields (vvarphi propto r-1/2) and the emissivity distribution of j propto r-3/2, and reconstruct emissivity profiles. The results show typically a `two-eye' pattern for high line-of-sight velocities and we can recover the relation, vvarphi propto d-1/2, where d is the separation of two lq eyes.' |
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