# The high-field magnetic white dwarf LP 790-29: not a fast rotator

Source: [The high-field magnetic white dwarf LP 790-29: not a fast rotator](<https://www.sota2.com/research/paper/68fa25422c2a3760193ae756>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T10:36:49.910Z

Authors: K. Beuermann, K. Reinsch

Published: 2001-12-04T15:29:44.000Z

## Abstract

We have investigated the nature of the magnetic white dwarf LP 790-29 = LHS 2293 by polarimetric monitoring, searching for short-term variability. No periodicity was found and we can exclude rotation periods between 4 sec and 1.5 hour with a high confidence. Maximum amplitudes of sinusoidal variations are Delta R \< 0.009 mag and Delta V\_R \< 0.7% for a mean value of the R-band circular polarization of V\_R = +9.1+/-0.3%. Combined with earlier results by other authors, our observation suggests that LP 790-29 is, in fact, an extremely slowly rotating single white dwarf and not an unrecognized fast rotator and/or disguised cataclysmic variable.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/astro-ph/0112073>)

[PDF](<https://arxiv.org/pdf/astro-ph/0112073.pdf>)