1999/05/28 by A. Retter, Ε. M. Leibowitz, E. M. Leibowitz +1 · 25 citations
Engineering · Physics and Astronomy · #Accretion disc #Amplitude #Astronomical Observations and Instrumentation #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Cataclysmic variable star #Gamma-ray bursts and supernovae #Irradiation #Light curve #Nova (rocket) #Nuclear physics #Optics #Orbital period #Photometry (optics) #Physics #Stars #White dwarf #astro-ph
paper · pdf · doi:10.1046/j.1365-8711.1999.02704.x
published in Monthly Notices of the Royal Astronomical Society 308(1), 140-146 (Oxford University Press) · 7 pages, Latex file, 2 .ps files and 3 .eps files. accepted for publication in MNRAS. also available at: ftp://ftp.astro.keele.ac.uk/pub/preprints/preprints.html
arxiv created 1999/05/28 · openalex publication_date 1999/09/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Continuous CCD photometry of the classical nova DN Gem during 52 nights in the years 1992–1998 reveals a modulation with a period of 0.127844 d. The semi-amplitude is about 0.03 mag. The stability of the variation suggests that it is the orbital period of the binary system. This interpretation makes DN Gem the fourth nova inside the cataclysmic variable (CV) period gap, as defined by Diaz & Bruch, and it bolsters the idea that there is no period gap for classical novae. However, the number of known nova periods is still too small to establish this idea statistically. We eliminate several possible mechanisms for the variation, and propose that the modulation is driven by an irradiation effect. We find that model light curves of an irradiated secondary star fit the data well. The inclination angle of the system is restricted by this model to 10°≲i≲65°. We also refine a previous estimate of the distance to the binary system, and find d=1.6±0.6 kpc.