SIMBAD references

2020AJ....160...70T - Astron. J., 160, 70-70 (2020/August-0)

Optical studies of eight AM Herculis-type cataclysmic variable stars.

THORSTENSEN J.R., MOTSOALEDI M., WOUDT P.A., BUCKLEY D.A.H. and WARNER B.

Abstract (from CDS):

We report detailed follow-up observations of eight cataclysmic variable stars (CVs) that are apparently AM Her stars, also called polars. For all, we either determine orbital periods for the first time or improve on existing determinations. The seven for which we have spectra show the high-amplitude radial-velocity curves and prominent He II λ4686 emission lines characteristic of strongly magnetic CVs, and their periods, which range from 81 to 219 minutes, are also typical for AM Her stars. Two objects from the Gaia-alerts index, Gaia18aot and Gaia18aya, are newly identified as CVs. Another, RX J0636.3+6554, eclipses deeply, while CSS 080228:081210+040352 shows a sharp dip that is apparently a partial eclipse. The spectrum of Gaia18aya has a cyclotron harmonic near λ5500 Å that constrains the surface field to ∼49 MG or greater.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Cataclysmic variable stars - AM Herculis stars - Eclipsing binary stars - Close binary stars - Interacting binary stars - White dwarf stars

Simbad objects: 13

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2021.02.26-07:15:04

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