The magnetic system SMSS J1606-1000 as a period bouncer

Adela Kawka; Stéphane Vennes; Lilia Ferrario; M. S. Bessell; S. C. Keller; E. Paunzen; D. A.H. Buckley; D. Groenewald; J. Janík; M. Zejda

doi:10.1093/mnrasl/slab085

The magnetic system SMSS J1606-1000 as a period bouncer

Adela Kawka^*, Stéphane Vennes, Lilia Ferrario, M. S. Bessell, S. C. Keller, E. Paunzen, D. A.H. Buckley, D. Groenewald, J. Janík, M. Zejda

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

We report the discovery of a rare close binary system, SMSS J160639.78-100010.7, comprising a magnetic white dwarf with a field of about 30 MG and a brown dwarf. We measured an orbital period of 92 min which is consistent with the photometric period. Minimum and maximum light occur at the orbital quadratures φ = 0.25 and 0.75, respectively, and cannot be caused by reflection on the brown dwarf, but, instead, by a spot on the synchronously rotating magnetic white dwarf. The brown dwarf does not fill its Roche lobe and the system may be in a low-accretion state or, more likely, in a detached state following episodes of mass transfer. SMSS J160639.78-100010.7 is the nearest known magnetic white dwarf plus brown dwarf system.

Original language	English
Pages (from-to)	L30-L35
Journal	Monthly Notices of the Royal Astronomical Society: Letters
Volume	507
Issue number	1
DOIs	https://doi.org/10.1093/mnrasl/slab085
Publication status	Published - 1 Oct 2021

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title = "The magnetic system SMSS J1606-1000 as a period bouncer",

abstract = "We report the discovery of a rare close binary system, SMSS J160639.78-100010.7, comprising a magnetic white dwarf with a field of about 30 MG and a brown dwarf. We measured an orbital period of 92 min which is consistent with the photometric period. Minimum and maximum light occur at the orbital quadratures φ = 0.25 and 0.75, respectively, and cannot be caused by reflection on the brown dwarf, but, instead, by a spot on the synchronously rotating magnetic white dwarf. The brown dwarf does not fill its Roche lobe and the system may be in a low-accretion state or, more likely, in a detached state following episodes of mass transfer. SMSS J160639.78-100010.7 is the nearest known magnetic white dwarf plus brown dwarf system.",

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author = "Adela Kawka and St{\'e}phane Vennes and Lilia Ferrario and Bessell, {M. S.} and Keller, {S. C.} and E. Paunzen and Buckley, {D. A.H.} and D. Groenewald and J. Jan{\'i}k and M. Zejda",

note = "Publisher Copyright: {\textcopyright} 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.",

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doi = "10.1093/mnrasl/slab085",

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T1 - The magnetic system SMSS J1606-1000 as a period bouncer

AU - Kawka, Adela

AU - Vennes, Stéphane

AU - Ferrario, Lilia

AU - Bessell, M. S.

AU - Keller, S. C.

AU - Paunzen, E.

AU - Buckley, D. A.H.

AU - Groenewald, D.

AU - Janík, J.

AU - Zejda, M.

PY - 2021/10/1

Y1 - 2021/10/1

N2 - We report the discovery of a rare close binary system, SMSS J160639.78-100010.7, comprising a magnetic white dwarf with a field of about 30 MG and a brown dwarf. We measured an orbital period of 92 min which is consistent with the photometric period. Minimum and maximum light occur at the orbital quadratures φ = 0.25 and 0.75, respectively, and cannot be caused by reflection on the brown dwarf, but, instead, by a spot on the synchronously rotating magnetic white dwarf. The brown dwarf does not fill its Roche lobe and the system may be in a low-accretion state or, more likely, in a detached state following episodes of mass transfer. SMSS J160639.78-100010.7 is the nearest known magnetic white dwarf plus brown dwarf system.

AB - We report the discovery of a rare close binary system, SMSS J160639.78-100010.7, comprising a magnetic white dwarf with a field of about 30 MG and a brown dwarf. We measured an orbital period of 92 min which is consistent with the photometric period. Minimum and maximum light occur at the orbital quadratures φ = 0.25 and 0.75, respectively, and cannot be caused by reflection on the brown dwarf, but, instead, by a spot on the synchronously rotating magnetic white dwarf. The brown dwarf does not fill its Roche lobe and the system may be in a low-accretion state or, more likely, in a detached state following episodes of mass transfer. SMSS J160639.78-100010.7 is the nearest known magnetic white dwarf plus brown dwarf system.

KW - binaries: spectroscopic

KW - stars: individual: SMSS J1606-1000

KW - stars: magnetic field

KW - white dwarfs

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DO - 10.1093/mnrasl/slab085

M3 - Article

SN - 1745-3925

VL - 507

SP - L30-L35

JO - Monthly Notices of the Royal Astronomical Society: Letters

JF - Monthly Notices of the Royal Astronomical Society: Letters

IS - 1

ER -

The magnetic system SMSS J1606-1000 as a period bouncer

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