2003/05/15 by S. Araujo-Betancor, S. Araujo‐Betancor, B. T. Gaensicke +6 · 30 citations
Physics and Astronomy · #Amplitude #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Cosmic Phenomena #Binary number #Cataclysmic variable star #Intermediate polar #Optics #Orbital inclination #Orbital period #Photometry (optics) #Physics #Polar #Pulsars and Gravitational Waves Research #Radial velocity #Spectral line #Stars #White dwarf #astro-ph
paper · pdf · doi:10.1051/0004-6361:20030787
published in Astronomy and Astrophysics 406(1), 213-219 (EDP Sciences) · 7 pages, A&A-Latex, 9 Figures, accepted for publication in A&A
arxiv created 2003/05/15 · openalex publication_date 2003/07/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report the identification of the cataclysmic variable 1RXS J062518.2+733433 as an intermediate polar. The orbital period of the system is determined to be min from the radial velocity variation of , measured in an extensive set of time-resolved spectra. Differential optical photometry obtained over a base line of three weeks reveals the presence of coherent variability with a period of min, which we suggest to be the white dwarf spin period. The power spectrum of our photometry also contains a strong signal near the spectroscopically-determined orbital period. The emission lines in 1RXS J062518.2+733433 display a complex multicomponent structure. In the trailed spectrogram of He I λ 6678 we detect a narrow component with a radial velocity semi-amplitude of 140 kms, consistent with a possible origin on the irradiated face of the secondary. The absence of eclipses gives an upper limit on the binary inclination of .