Discovery of spin-modulated circular polarization from IGR J17014-4306, the remnant of Nova Scorpii 1437 AD
Abstract
Polarimetry of IGR J1401-4306, a long-period (12.7 h) eclipsing intermediate polar and remnant of Nova Scorpii 1437 AD, 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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- February 2018
- DOI:
- 10.1093/mnras/stx2493
- arXiv:
- arXiv:1709.08220
- Bibcode:
- 2018MNRAS.473.4692P
- Keywords:
-
- accretion;
- accretion discs;
- methods: analytical;
- techniques: polarimetric;
- binaries: close;
- novae;
- cataclysmic variables;
- X-rays: stars;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 7 pages, figures, accepted for publication in MNRAS