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New observations of NGC 1624-2 reveal a complex magnetospheric structure and underlying surface magnetic geometry
- Source :
- MNRAS, 501, 2677 (2021)
- Publication Year :
- 2020
-
Abstract
- NGC 1624-2 is the most strongly magnetized O-type star known. Previous spectroscopic observations of this object in the ultraviolet provided evidence that it hosts a large and dense circumstellar magnetosphere. Follow-up observations obtained with the \textit{Hubble Space Telescope} not only confirm that previous inference, but also suggest that NGC 1624-2's magnetosphere has a complex structure. Furthermore, an expanded spectropolarimetric time series shows a potential departure from a dipolar magnetic field geometry, which could mean that the strongest field detected at the surface of an O-type star is also topologically complex. This result raises important questions regarding the origin and evolution of magnetic fields in massive stars.<br />Comment: 12 pages, 3 figures, accepted for publication by MNRAS (2020 December 1)
- Subjects :
- Astrophysics - Solar and Stellar Astrophysics
Subjects
Details
- Database :
- arXiv
- Journal :
- MNRAS, 501, 2677 (2021)
- Publication Type :
- Report
- Accession number :
- edsarx.2010.07482
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1093/mnras/staa3768