Detection of orbital and superhump periods in Nova V2574 Ophiuchi (2004)

Abstract

We present the results of 37 nights of CCD unfiltered photometry of nova V2574 Oph (2004) from 2004 and 2005. We find two periods of 0.14164 d (~3.40 h) and 0.14773 d (~3.55 h) in the 2005 data. The 2004 data show variability on a similar timescale, but no coherent periodicity was found. We suggest that the longer periodicity is the orbital period of the underlying binary system and that the shorter period represents a negative superhump. The 3.40 h period is about 4% shorter than the orbital period and obeys the relation between superhump period deficit and binary period. The detection of superhumps in the light curve is evidence of the presence of a precessing accretion disk in this binary system shortly after the nova outburst. From the maximum magnitude - rate of decline relation, we estimate the decay rate t_2 = 17+/-4 d and a maximum absolute visual magnitude of M_Vmax = -7.7+/-1.7 mag.

arXiv comment6 pages, 6 figures, 2 .sty files, AJ accepted, minor change to one of references

References in corpus (17)

• The Secondary Star in Cataclysmic Variables and Low Mass X-ray Binaries
• A 6.3-h superhump in the cataclysmic variable TV Columbae: the longest yet seen
• Detection of negative superhumps in a LMXRB -- an end to the long debate on the nature of V1405 Aql (X1916-053)
• High Speed photometry of faint Cataclysmic Variables: I. V359 Cen, XZ Eri, HY Lup, V351 Pup, V630 Sgr, YY Tel, CQ Vel, CE-315
• High speed photometry of faint Cataclysmic Variables: II. RS Car, V365 Car,] V436 Car, AP Cru, RR Cha, BI Ori, CM Phe and V522 Sgr
• Time-Resolved HST Spectroscopy of Four Eclipsing Magnetic Cataclysmic Variables
• Simultaneous optical polarimetry and X-ray data of the near synchronous polar RX J2115-5840
• Thermal stability and nova cycles in permanent superhump systems
• Evidence for Superhumps in the Radio Light Curve of Algol and a New Model for Magnetic Activity in Algol Systems
• An Irradiation Effect in Nova DN Gem 1912 and the Significance of the Period Gap for Classical Novae
• Nova Sagittarii 1998 (V4633 Sgr) - a permanent superhump system or an asynchronous polar?
• Predicting the Future of Superhumps in Classical Nova Systems
• Nova V1425 Aquilae 1995 - The Early Appearance of Accretion Processes in An Intermediate Polar Candidate
• The orbital period of Nova V2540 Ophiuchi (2002)
• Discovery of Irradiation Induced Variations in the Light Curve of the Classical Nova Cygni 2001 No.2 (V2275 Cyg)
• Constraining jet theories using nova outbursts
• Mass Transfer Processes in Classical Nova Systems Around Their Outburst Events and Beyond

Cited by in corpus (9)

• SPH Simulations of Negative (Nodal) Superhumps: A Parametric Study
• Earth, Moon, Sun, and CV Accretion Disks
• Atlas of Tilted Accretion Disks & Source to Negative Superhumps
• TESS light curves of cataclysmic variables -- II: Superhumps in old novae and novalike variables
• Nova V4743 Sagittarii 2002: An Intermediate Polar Candidate
• Nova V5116 Sgr and searching for superhumps in nova remnants
• V4745 Sgr -- a nova above the period gap and an intermediate polar candidate
• Life after eruption VIII: The orbital periods of novae
• Accretion Discs with an Inner Spiral Density Wave