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29 March 2024 |
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Article overview
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A spectroscopic, photometric, polarimetric and radio study of the eclipsing polar UZ Fornacis: the first simultaneous SALT and MeerKAT observations | Zwidofhelangani N. Khangale
; Stephen B. Potter
; Patrick A. Woudt
; David A. H. Buckley
; Andrey N. Semena
; Enrico J. Kotze
; Danièl N. Groenewald
; Dante M. Hewitt
; Margaretha L. Pretorius
; Rob P. Fender
; Paul Groot
; Steven Bloemen
; Marc Klein-Wolt
; Elmar Körding
; Rudolf Le Poole
; Vanessa A. McBride
; Lee Townsend
; Kerry Paterson
; Danielle L. A. Pieterse
; Paul M. Vreeswijk
; | Date: |
16 Jan 2020 | Abstract: | We present phase-resolved spectroscopy, photometry and circular
spectropolarimetry of the eclipsing polar UZ Fornacis. Doppler tomography of
the strongest emission lines using the inside-out projection revealed the
presence of three emission regions: from the irradiated face of the secondary
star, the ballistic stream and the threading region, and the magnetically
confined accretion stream. The total intensity spectrum shows broad emission
features and a continuum that rises in the blue. The circularly polarized
spectrum shows the presence of three cyclotron emission harmonics at $sim$4500
AA{}, 6000 AA{} and 7700 AA{}, corresponding to harmonic numbers 4, 3, and
2, respectively. These features are dominant before the eclipse and disappear
after the eclipse. The harmonics are consistent with a magnetic field strength
of $sim$57 MG. We also present phase-resolved circular and linear
photopolarimetry to complement the spectropolarimetry around the times of
eclipse. MeerKAT radio observations show a faint source which has a peak flux
density of 30.7 $pm$ 5.4 $mu$Jy/beam at 1.28 GHz at the position of UZ For. | Source: | arXiv, 2001.6036 | Services: | Forum | Review | PDF | Favorites |
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