Roche tomography of cataclysmic variables: I. artefacts and techniques

Details Roche tomography of cataclysmic variables: I. artefacts and techniques Roche tomography of cataclysmic variables: I. artefacts and techniques

2001-01-29

arxiv.org/abs/astro-ph/0101513v1

Mon.Not.Roy.Astron.Soc. 326 (2001) 67

Astronomy and Astrophysics

Astrophysics

11 pages, 8 figures. Accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.2001.04408.x

Roche tomography is a technique used for imaging the Roche-lobe filling secondary stars in cataclysmic variables (CVs). In order to interpret Roche tomograms correctly, one must determine whether features in the reconstruction are real, or due to statistical or systematic errors. We explore the effects of systematic errors using reconstructions of simulated datasets and show that systematic errors result in characteristic distortions of the final reconstructions that can be identified and corrected. In addition, we present a new method of estimating statistical errors on tomographic reconstructions using a Monte-Carlo bootstrapping algorithm and show this method to be much more reliable than Monte-Carlo methods which `jiggle' the data points in accordance with the size of their error bars.

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