Search Menu
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information
Search Scholarly Publications

Title: PNV J00444033+4113068: Early superhumps with 0.7 mag amplitude and non-red color

Journal Article · · Publications of the Astronomical Society of Japan
ORCiD logo; ; ; ; ; ; ; ; ; ; ; ; ; ; ;

Abstract In the first days of WZ Sge-type dwarf nova (DN) outbursts, the 2 : 1 resonance induces a spiral arm structure in the accretion disk, which is observed as early superhumps in optical light curves. We reports on our optical observations of an eclipsing WZ Sge-type DN PNV J00444033+4113068 during its 2021 superoutburst using the 3.8 m Seimei telescope and through the Variable Star Network collaboration. The eclipse analysis showed that its orbital period was 0.055425534(1) d. Our observations confirmed early superhumps with an amplitude of 0.7 mag, the largest amplitude among known WZ Sge-type DNe. More interestingly, its early superhumps became the reddest around their secondary minimum, whereas other WZ Sge-type DNe show the reddest color around the early superhump maximum. The spectrum around the peak of the outburst showed two double-peaked emission lines of He ii 4686 Å and Hα with a peak separation of ≥700 km s−1, supporting a very high-inclination system. With the early superhump mapping, the unique profile and color of the early superhump are successfully reproduced by an accretion disk with a vertically extended double arm structure. Therefore, a large amplitude and a unique color behavior of the early superhumps in PNV J00444033+4113068 can be explained by the 2 : 1 resonance model along with other WZ Sge-type DNe.

Sponsoring Organization:
USDOE
OSTI ID:
1887909
Journal Information:
Publications of the Astronomical Society of Japan, Journal Name: Publications of the Astronomical Society of Japan Journal Issue: 6 Vol. 74; ISSN 0004-6264
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
Japan
Language:
English

References (34)

Cataclysmic Variable Stars book January 2009
Spectral atlas of dwarf novae in outburst journal June 2002
First detection of the growing humps at the rapidly rising stage of dwarf novae AL Com and WZ Sge journal January 2002
Early humps in WZ Sge stars journal February 2002
The ALADIN interactive sky atlas: A reference tool for identification of astronomical sources journal April 2000
Robust Locally Weighted Regression and Smoothing Scatterplots journal December 1979
Uncertainties in period determinations journal February 1989
Dwarf-Nova Outbursts journal January 1996
Period determination using phase dispersion minimization journal September 1978
A model for tidally driven eccentric instabilities in fluid disks journal November 1991
The 1995 Superoutburst of the WZ Sge–type Dwarf Nova AL Comae Berenices journal December 1997
SDSS 1507+52: A Halo Cataclysmic Variable?1
  • Patterson, Joseph; Thorstensen, John R.; Knigge, Christian
  • Publications of the Astronomical Society of the Pacific, Vol. 120, Issue 867 https://doi.org/10.1086/588615
journal May 2008
The Evolution of Cataclysmic Variables as Revealed by Their Donor Stars journal May 2011
ATLAS: A High-cadence All-sky Survey System journal May 2018
The Zwicky Transient Facility: System Overview, Performance, and First Results journal December 2018
Tidal torques on accretion discs in binary systems with extreme mass ratios journal April 1979
Numerical simulations of accretion discs – I. Superhumps: a tidal phenomenon of accretion discs journal May 1988
Constraining the evolution of cataclysmic variables via the masses and accretion rates of their underlying white dwarfs journal November 2021
Spiral Structure in WZ Sagittae around the 2001 Outburst Maximum journal February 2002
Variable Star Network: World Center for Transient Object Astronomy and Variable Stars journal March 2004
Dramatic Spectral Evolution of WZ Sagittae during the 2001 Superoutburst journal March 2004
The 2003/2004 Superoutburst of SDSS J013701.06−091234.9 journal February 2006
Photometric Observation and Numerical Simulation of Early Superhumps in BC Ursae Majoris during the 2003 Superoutburst journal February 2007
Optical and Near-Infrared Photometric Observation during the Superoutburst of the WZ Sge-Type Dwarf Nova, V455 Andromedae journal October 2009
Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae journal December 2009
Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. II The Second Year (2009–2010) journal December 2010
Reconstruction of the Structure of Accretion Disks in Dwarf Novae from the Multi-Band Light Curves of Early Superhumps journal October 2012
Multicolor Photometry of an Outburst of a New WZ Sge-Type Dwarf Nova, OT J012059.6+325545 journal June 2013
The Seimei telescope project and technical developments journal May 2020
Spectroscopic and photometric observations of dwarf nova superoutbursts by the 3.8 m telescope Seimei and the Variable Star Network journal May 2021
Optical dual-band photometry and spectroscopy of the WZ Sge-type dwarf nova EZ Lyn during the 2010 superoutburst journal February 2015
WZ Sge-type dwarf novae journal September 2015
KOOLS–IFU: Kyoto Okayama Optical Low-dispersion Spectrograph with optical-fiber Integral Field Unit journal August 2019
A Spectroscopic Survey of Massive Stars in m31 and m33* journal August 2016

Similar Records

WZ Sagittae: Recent observations leading to a model for superhump phenomena
Journal Article · 1980 · Astrophys. J.; (United States) · OSTI ID:5366238
V344 LYRAE: A TOUCHSTONE SU UMa CATACLYSMIC VARIABLE IN THE KEPLER FIELD
Journal Article · 2011 · Astrophysical Journal · OSTI ID:21612685
+1 more
QUIESCENT SUPERHUMPS DETECTED IN THE DWARF NOVA V344 LYRAE BY KEPLER
Journal Article · 2010 · Astrophysical Journal Letters · OSTI ID:21451044
+2 more

Related Subjects