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September 10, 2025Monthly Notices of the Royal Astronomical SocietyOpen Access

MASTER OT J072007.30+451611.6: A Polar with Strong Optical Variability and Suppressed He II Emission

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Authors

ABA. V. BobakovIoffe InstituteSZS. V. ZharikovUniversidad Autónoma de Baja CaliforniaAKA V KarpovaIoffe Institute

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Overview

Multiband optical photometry reveals high amplitude optical variability in a polar, indicating unusual accretion behavior.

Key Points

  • MASTER OT J072007.30+451611.6 shows a significant optical variability of approximately 3 mag.
  • The source was identified as a polar with a confirmed orbital period of around 1.5 hours.
  • Spectroscopic analysis reveals an unusual low ratio of He II and H β emission lines for polars.
  • Doppler tomography indicates emission components linked to the white dwarf's magnetosphere and L1 point accretion.

Cite This Study

Bobakov et al. (2025) studied this question.

synapsesocial.com/papers/68c1a40954b1d3bfb60de827https://doi.org/10.1093/mnras/staf1124
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