2021/01/27 by J. A. Toalá, G Rubio, G. Rubio +6 · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Binary star #Cataclysmic variable star #Geometry #High-pressure geophysics and materials #Intermediate polar #Light curve #Line (geometry) #Luminosity #Nova (rocket) #Nuclear physics #Optics #Orbital period #Physics #Plasma #Pulsars and Gravitational Waves Research #Shell (structure) #Stars #White dwarf #X-ray #astro-ph.HE #astro-ph.SR
paper · pdf · doi:10.1093/mnras/stab273
6 pages and 5 Figures; Accepted to MNRAS
arxiv created 2021/01/27 · openalex publication_date 2021/01/29 · openalex created_date 2021/02/01 · arxiv updated 2021/02/10 · openalex updated_date 2026/08/05
ABSTRACT We present the analysis of XMM–Newton European Photon Imaging Camera (EPIC) observations of the nova shell IPHASX J210204.7+471015. We detect X-ray emission from the progenitor binary star with properties that resemble those of underluminous intermediate polars such as DQ Herculis (DQ Her): an X-ray-emitting plasma with temperature of TX = (6.4 ± 3.1) × 106 K, a non-thermal X-ray component, and an estimated X-ray luminosity of LX = 1030 erg s−1. Time series analyses unveil the presence of two periods, the dominant with a period of 2.9 ± 0.2 h, which might be attributed to the spin of the white dwarf, and a secondary of 4.5 ± 0.6 h that is in line with the orbital period of the binary system derived from optical observations. We do not detect extended X-ray emission as in other nova shells probably due to its relatively old age (130–170 yr) or to its asymmetric disrupted morphology that is suggestive of explosion scenarios different to the symmetric ones assumed in available numerical simulations of nova explosions.