The sensitivity of Doppler imaging to line profile models

Details The sensitivity of Doppler imaging to line profile models The sensitivity of Doppler imaging to line profile models

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.273....1u&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 273, Issue 1, pp. 1-16.

Astronomy and Astrophysics

Astronomy

42

Techniques: Image Processing, Stars: Activity, Stars: Imaging

Scientific paper

In recent years there have been a number of successful reconstructions of the surfaces of fast rotating stars using Doppler imaging. As a large proportion of the imaged stars show large high-latitude spots, some doubt remains as to whether these high-latitude spots might be artefacts. In this paper we investigate how sensitive Doppler imaging is to the exact shape of the mapping line profile and its variation as a function of limb angle. We find that Doppler imaging is surprisingly robust against errors in the limb dependence of the profile, but that errors in the shape of the profile, and in particular the neglect of blends at considerable distances from the mapping line, will lead to spurious banding in the reconstructed images.

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