Discovery of spin modulated circular polarization from IGR J17014-4306, the remnant of Nova Scorpii 1437 A.D
arXiv:1709.08220 · doi:10.1093/mnras/stx2493
Abstract
Polarimetry of IGR J1401-4306, a long period (12.7 hours), eclipsing intermediate polar and remnant of Nova Scorpii 1437 A.D., reveals periodic variations of optical circular polarization, confirming the system as the longest period eclipsing intermediate polar known. This makes it an interesting system from an evolutionary perspective. The circular polarization is interpreted as optical cyclotron emission from an accreting magnetic white dwarf primary. Based on the polarimetry, we propose that it is a disc-fed intermediate polar. The detection of predominantly negative circular polarization is consistent with only one of the magnetic poles dominating the polarized emission, while the other is mostly obscured by the accretion disc.
arXiv comment7 pages, figures, accepted for publication in MNRAS
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- Multiwavelength observations of V407 Lupi (ASASSN-16kt) --- a very fast nova erupting in an intermediate polar
- The luminosity evolution of nova shells -- I. A new analysis of old data
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- V902 Monocerotis: a likely disc-accreting intermediate polar
- J1832.4-1627, the first eclipsing stream-fed intermediate polar
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