A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
TESS observations of the asynchronous polar CD Ind: mapping the changing accretion geometry
Tekijät: Pasi Hakala, Gavin Ramsay, Stephen B. Potter, Andrew Beardmore, David A. H. Buckley, Graham Wynn
Kustantaja: OXFORD UNIV PRESS
Julkaisuvuosi: 2019
Journal: Monthly Notices of the Royal Astronomical Society
Lehden akronyymi: MON NOT R ASTRON SOC
Vuosikerta: 486
Numero: 2
Aloitussivu: 2549
Lopetussivu: 2556
Sivujen määrä: 8
ISSN: 0035-8711
eISSN: 1365-2966
DOI: https://doi.org/10.1093/mnras/stz992
Verkko-osoite: https://academic.oup.com/mnras/article/486/2/2549/5432374
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/41456805
We present the results of near continuous TESS optical observations of the asynchronous polar CD Ind (RX J2115-5840). The 27.9 d long light curve, with 2 min resolution, reveals remarkable changes in the magnetic accretion geometry of the system over the 7.3 d beat period. We have modelled the changes in the optical spin period pulse shape using a cyclotron emission mapping technique. The resulting cyclotron emission maps of the magnetic white dwarf reveal how the accretion geometry changes from single- to two-pole accretion and back over the beat cycle. Finally, we present the results from particle-based numerical magnetic accretion simulations, which agree with our interpretation of the changing accretion scenario.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
