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Exploring the tilted accretion disc of AQ Men with TESS

Exploring the tilted accretion disc of AQ Men with TESS
Exploring the tilted accretion disc of AQ Men with TESS
AQ Men is a nova-like variable that is presumed to have a tilted, precessing accretion disc. Grazing eclipses in this system have been speculated to be useful in exploring the geometry of its accretion disc. In this work, we analysed Transiting Exoplanet Survey Satellite (TESS) observations of AQ Men, which provide the best light curve of this object thus far. We show that the depths of the eclipses are changing with the orientation of the accretion disc, which means that they can serve as a direct test of the tilted accretion disc models. The precession period of the accretion disc is increasing during the TESS observations. However, it is still shorter than the period determined in the previous studies. The amplitude of the variability related to the precession of the accretion disc varies, and so does the shape of this variability. Moreover, we have detected a positive superhump that was previously unseen in AQ Men. Interestingly, the positive superhump has a strongly non-sinusoidal shape, which is not expected for a nova-like variable.
0035-8711
4050 - 4060
Iłkiewicz, Krystian
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Scaringi, Simone
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Court, James M.C.
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Maccarone, Thomas J.
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Altamirano, Diego
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Bradshaw, Corey W.
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Degenaar, Nathalie
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Fratta, Matteo
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Littlefield, Colin
431babb8-83de-4880-8086-e3d4ba327d41
Shahbaz, Tariq
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Wijnands, Rudy
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Iłkiewicz, Krystian
cbde6518-7a05-4e02-b03f-1178e8a8c953
Scaringi, Simone
312a867b-71bf-4a4f-b6db-8c9fb1a99419
Court, James M.C.
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Maccarone, Thomas J.
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Altamirano, Diego
d5ccdb09-0b71-4303-9538-05b467be075b
Bradshaw, Corey W.
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Degenaar, Nathalie
347a2379-6b78-482e-976c-52f08a96114d
Fratta, Matteo
184856f3-a050-4e37-adf6-9d6c47226703
Littlefield, Colin
431babb8-83de-4880-8086-e3d4ba327d41
Shahbaz, Tariq
f2bf7b44-f5e3-46e2-8ba4-8cb32f9cabb9
Wijnands, Rudy
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Iłkiewicz, Krystian, Scaringi, Simone, Court, James M.C., Maccarone, Thomas J., Altamirano, Diego, Bradshaw, Corey W., Degenaar, Nathalie, Fratta, Matteo, Littlefield, Colin, Shahbaz, Tariq and Wijnands, Rudy (2021) Exploring the tilted accretion disc of AQ Men with TESS. Monthly Notices of the Royal Astronomical Society, 503 (3), 4050 - 4060. (doi:10.1093/mnras/stab664).

Record type: Article

Abstract

AQ Men is a nova-like variable that is presumed to have a tilted, precessing accretion disc. Grazing eclipses in this system have been speculated to be useful in exploring the geometry of its accretion disc. In this work, we analysed Transiting Exoplanet Survey Satellite (TESS) observations of AQ Men, which provide the best light curve of this object thus far. We show that the depths of the eclipses are changing with the orientation of the accretion disc, which means that they can serve as a direct test of the tilted accretion disc models. The precession period of the accretion disc is increasing during the TESS observations. However, it is still shorter than the period determined in the previous studies. The amplitude of the variability related to the precession of the accretion disc varies, and so does the shape of this variability. Moreover, we have detected a positive superhump that was previously unseen in AQ Men. Interestingly, the positive superhump has a strongly non-sinusoidal shape, which is not expected for a nova-like variable.

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2103.03041 - Accepted Manuscript
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Accepted/In Press date: 24 February 2021
Published date: 8 March 2021
Additional Information: arXiv:2103.03041

Identifiers

Local EPrints ID: 456784
URI: http://eprints.soton.ac.uk/id/eprint/456784
ISSN: 0035-8711
PURE UUID: 392a677b-e818-43cb-a9d5-8f5f8ae558d9
ORCID for Diego Altamirano: ORCID iD orcid.org/0000-0002-3422-0074

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Date deposited: 11 May 2022 16:43
Last modified: 12 May 2022 01:45

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Contributors

Author: Krystian Iłkiewicz
Author: Simone Scaringi
Author: James M.C. Court
Author: Thomas J. Maccarone
Author: Corey W. Bradshaw
Author: Nathalie Degenaar
Author: Matteo Fratta
Author: Colin Littlefield
Author: Tariq Shahbaz
Author: Rudy Wijnands

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