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The rms-flux relation in accreting white dwarfs: another nova-like variable and the first dwarf nova

The rms-flux relation in accreting white dwarfs: another nova-like variable and the first dwarf nova
The rms-flux relation in accreting white dwarfs: another nova-like variable and the first dwarf nova
We report on the detection of the linear rms-flux relation in two accreting white dwarf binary systems: V1504 Cyg and KIC 8751494. The rms-flux relation relates the absolute root-mean-square (rms) variability of the light curve to its mean flux. The light curves analysed were obtained with the Kepler satellite at a 58.8 s cadence. The rms-flux relation was previously detected in only one other cataclysmic variable (CV), MV Lyr. This result reinforces the ubiquity of the linear rms-flux relation as a characteristic property of accretion-induced variability, since it has been observed in several black hole binaries, neutron star binaries and active galactic nuclei. Moreover, its detection in V1504 Cyg is the first time the rms-flux relation has been detected in a dwarf nova-type CV during quiescence. This result, together with previous studies, hence points towards a common physical origin of accretion-induced variability, independent of the size, mass or type of the central accreting compact object.
accretion, accretion discs, binaries: close, stars: dwarf novae, stars: individual: V1504 Cyg, stars: individual: KIC 8751494, novae, cataclysmic variables
0035-8711
2430-2437
Van de Sande, M.
d144b420-e5b5-4ff9-889b-189a39090b7c
Scaringi, S.
88701970-a1b9-41fe-bf55-886716ee3374
Knigge, C.
ac320eec-631a-426e-b2db-717c8bf7857e
Van de Sande, M.
d144b420-e5b5-4ff9-889b-189a39090b7c
Scaringi, S.
88701970-a1b9-41fe-bf55-886716ee3374
Knigge, C.
ac320eec-631a-426e-b2db-717c8bf7857e

Van de Sande, M., Scaringi, S. and Knigge, C. (2015) The rms-flux relation in accreting white dwarfs: another nova-like variable and the first dwarf nova. Monthly Notices of the Royal Astronomical Society, 448 (3), 2430-2437. (doi:10.1093/mnras/stv157).

Record type: Article

Abstract

We report on the detection of the linear rms-flux relation in two accreting white dwarf binary systems: V1504 Cyg and KIC 8751494. The rms-flux relation relates the absolute root-mean-square (rms) variability of the light curve to its mean flux. The light curves analysed were obtained with the Kepler satellite at a 58.8 s cadence. The rms-flux relation was previously detected in only one other cataclysmic variable (CV), MV Lyr. This result reinforces the ubiquity of the linear rms-flux relation as a characteristic property of accretion-induced variability, since it has been observed in several black hole binaries, neutron star binaries and active galactic nuclei. Moreover, its detection in V1504 Cyg is the first time the rms-flux relation has been detected in a dwarf nova-type CV during quiescence. This result, together with previous studies, hence points towards a common physical origin of accretion-induced variability, independent of the size, mass or type of the central accreting compact object.

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Published date: 1 April 2015
Keywords: accretion, accretion discs, binaries: close, stars: dwarf novae, stars: individual: V1504 Cyg, stars: individual: KIC 8751494, novae, cataclysmic variables

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Local EPrints ID: 430096
URI: http://eprints.soton.ac.uk/id/eprint/430096
ISSN: 0035-8711
PURE UUID: ff903330-105c-451b-a169-48015b65e417

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Date deposited: 11 Apr 2019 16:30
Last modified: 28 Oct 2019 17:38

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