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Multiwavelength observations of V407 Lupi (ASASSN-16kt) - a very fast nova erupting in an intermediate polar

Aydi, E; Orio, M; Beardmore, AP; Ness, J-U; Page, KL; Kuin, NPM; Walter, FM; ... Woodward, CE; + view all (2018) Multiwavelength observations of V407 Lupi (ASASSN-16kt) - a very fast nova erupting in an intermediate polar. Monthly Notices of the Royal Astronomical Society , 480 (1) pp. 572-609. 10.1093/mnras/sty1759. Green open access

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Abstract

We present a detailed study of the 2016 eruption of nova V407 Lupi (ASASSN-16kt), including optical, near-infrared, X-ray, and ultraviolet data from SALT, SMARTS, SOAR, Chandra, Swift, and XMM–Newton. Timing analysis of the multiwavelength light curves shows that, from 168 d post-eruption and for the duration of the X-ray supersoft source phase, two periods at 565 s and 3.57 h are detected. We suggest that these are the rotational period of the white dwarf and the orbital period of the binary, respectively, and that the system is likely to be an intermediate polar. The optical light-curve decline was very fast (t2 ≤ 2.9 d), suggesting that the white dwarf is likely massive (≳ 1.25 M⊙). The optical spectra obtained during the X-ray supersoft source phase exhibit narrow, complex, and moving emission lines of He II, also characteristics of magnetic cataclysmic variables. The optical and X-ray data show evidence for accretion resumption while the X-ray supersoft source is still on, possibly extending its duration.

Type: Article
Title: Multiwavelength observations of V407 Lupi (ASASSN-16kt) - a very fast nova erupting in an intermediate polar
Open access status: An open access version is available from UCL Discovery
DOI: 10.1093/mnras/sty1759
Publisher version: http://doi.org/10.1093/mnras/sty1759
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: stars: individual (V407 Lup) – novae, cataclysmic variables – white dwarfs
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: http://discovery.ucl.ac.uk/id/eprint/10055888
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