Investigating the low-flux states in six Intermediate Polars
arXiv:2202.08365 · doi:10.3847/1538-4357/ac5682
Abstract
We present optical photometry of six intermediate polars that exhibit transitions to a low-flux state. For four of these systems, DW Cnc, V515 And, V1223 Sgr and RX J2133.7+5107, we are able to perform timing analysis in and out of the low states. We find that, for DW Cnc and V515 And, the dominant periodicities in the light curves change as the flux decreases, indicating a change in the sources' accretion properties as they transition to the low state. For V1223 Sgr we find that the variability is almost completely quenched at the lowest flux, but do not find evidence for a changing accretion geometry. For RX J2133.7+5107, the temporal properties do not change in the low state, but we do see a period of enhanced accretion that is coincident with increased variability on the beat frequency, which we do not associate with a change in the accretion mechanisms in the system.
19 pages, 10 figures, accepted for publication in ApJ. The authors recommend downloading the PDF of this paper, as it takes a while to render online
References in corpus (18)
- The Gaia mission
- Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
- The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
- The Accretion Flows and Evolution of Magnetic Cataclysmic Variables
- Constraints on the space density of intermediate polars from the Swift-BAT survey
- Measuring the masses of magnetic white dwarfs: A NuSTAR Legacy Survey
- Magnetically gated accretion in an accreting 'non-magnetic' white dwarf
- The Spin-Period History of Intermediate Polars
- XSS J00564+4548 and IGR J00234+6141 -- new cataclysmic variables from RXTE and INTEGRAL all sky surveys
- Quasi-periodic oscillations in the TESS light curve of TX Col, a diskless intermediate polar on the precipice of forming an accretion disk
- Return of the King: Time-Series Photometry of FO Aquarii's Initial Recovery from its Unprecedented 2016 Low State
- An accreting white dwarf displaying fast transitional mode switching
- DW Cancri in x-rays
- TESS observations of TX Col: Rapidly varying accretion flow
- The true nature of Swift J0746.3-1608: a possible Intermediate Polar showing accretion state changes
- Rapid bursts of magnetically gated accretion in the intermediate polar V1025 Cen
- Optical spectra of FO Aquarii during low and high accretion rates
- New observations of DW Cnc: where is the 38 min signal?