Transient behavior of three SU UMa-type dwarf novae; AR Pic, QW Ser and V521 Peg
arXiv:2204.11056 · doi:10.1093/mnras/stac1161
Abstract
Changes in the supercycle lengths of some SU UMa-type dwarf novae have been detected by other studies, and indicate that the mass transfer rates noticeably decrease over time. We investigated the supercycle lengths of three SU UMa-type dwarf novae: AR Pic, QW Ser and V521 Peg, to determine if they have detectable changes in their supercycles. We present the results of optical spectroscopic and photometric observations of these sources. Our observations were conducted in 2016 and 2017 at the Boyden Observatory and the Sutherland station of the South African Astronomical Observatory. The quiescent results indicated that all three sources are typical SU UMa-type dwarf novae. We also present results of AR Pic and QW Ser in outburst and of V521 Peg during a precursor outburst and superoutburst. Light curves were supplemented by the Catalina Real-Time Transient Survey, the ASAS-3 and ASAS-SN archives, and the AAVSO International database in order to investigate the long-term behavior of these sources. Our results combined with catalogued properties for all short-period dwarf novae, shows a possible relationship between the supercycle time in SU UMa systems and their orbital periods, which is interpreted as the decline in the mass transfer rate as systems evolve toward and away from the 'period minimum'. At the shortest orbital periods, SU UMa systems are almost indistinguishable from WZ Sge systems. However, we propose that the scaleheight between the secondary's photosphere and L1 may be a factor that distinguish the SU UMa subclasses.
arXiv comment14 pages, 19 figures, accepted for publication in MNRAS
References in corpus (37)
- The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
- First Results from the Catalina Real-time Transient Survey
- The disc instability model of dwarf-novae and low-mass X-ray binary transients
- Achieving better than 1 minute accuracy in the Heliocentric and Barycentric Julian Dates
- Gaia Data Release 2: using Gaia parallaxes
- The Evolution of Cataclysmic Variables as Revealed by their Donor Stars
- Post-common-envelope binaries from SDSS. XI: The white dwarf mass distributions of CVs and pre-CVs
- Probing the Outer Galactic halo with RR Lyrae from the Catalina Surveys
- Superhumps in Cataclysmic Binaries. XXV. q_crit, epsilon(q), and Mass-Radius
- Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae
- The ASAS-SN Catalog of Variable Stars III: Variables in the Southern TESS Continuous Viewing Zone
- WZ Sge-Type Dwarf Novae
- Cataclysmic Variables from the Catalina Real-time Transient Survey
- Superhumps in Cataclysmic Binaries. XXIV. Twenty More Dwarf Novae
- X-ray Binaries
- Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IV: The Fourth Year (2011-2012)
- The Cause of the Superoutburst in SU UMa Stars is Finally Revealed by Kepler Light Curve of V1504 Cygni
- The Kepler Light Curve of V344 Lyrae: Constraining the Thermal-Viscous Limit Cycle Instability
- Statistical analysis of properties of dwarf novae outbursts
- Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. VI: The Sixth Year (2013-2014)
- Statistical properties of dwarf novae-type cataclysmic variables: The Outburst Catalogue
- A Further Study of Superoutbursts and Superhumps in SU UMa Stars by the Kepler Light Curves of V1504 Cygni and V344 Lyrae
- Dwarf novae in the Hamburg Quasar Survey: Rarer than expected
- Delays in dwarf novae: VW Hyi, the tidal instability and enhanced mass transfer models
- WD 1202-024: The Shortest-Period Pre-Cataclysmic Variable
- Cataclysmic variables from the Calan-Tololo-Survey -- I. Photometric periods
- Astrokit -- an Efficient Program for High-Precision Differential CCD Photometry and Search for Variable Stars
- Detection of the white dwarf and the secondary star in the new SU UMa dwarf nova HS 2219+1824
- Spectroscopic Observations of the WZ Sge-Type Dwarf Nova GW Librae during the 2007 Superoutburst
- Dramatic Spectral Evolution of WZ Sagittae during the 2001 Superoutburst
- A New SU UMa-Type Dwarf Nova, QW Serpentis (= TmzV46)
- Curious Variables Experiment (CURVE). CCD Photometry of QW Serpentis in Superoutburst and Quiescence
- On supercycle lengths of active SU UMa stars
- Photometric Studies of New Southern SU UMa-type dwarf novae, FL Triangulum Australe and CTCV J0549-4921
- Determination of the superoutburst cycle lengths of 206 SU UMa type dwarf novae
- A Phenomenological Model for the Light Curve of three Quiescent Low-inclination Dwarf Novae and one Pre-Cataclysmic Variable
- CS Indi: SU UMa-Type Dwarf Nova with Long Precursor Outburst