Peering into the central region of a nano-quasar: XMM-Newton and Chandra views of the CH Cyg Symbiotic System
arXiv:2305.03679 · doi:10.1093/mnras/stad1401
Abstract
We present the analysis of archival XMM-Newton and Chandra observations of CH Cyg, one of the most studied symbiotic stars (SySts). The combination of the high-resolution XMM-Newton RGS and Chandra HETG X-ray spectra allowed us to obtain reliable estimates of the chemical abundances and to corroborate the presence of multi-temperature X-ray-emitting gas. Spectral fitting of the medium-resolution XMM-Newton MOS (MOS1+MOS2) spectrum required the use of an additional component not seen in previous studies in order to fit the 2.0-4.0 keV energy range. Detailed spectral modelling of the XMM-Newton MOS data suggests the presence of a reflection component, very similar to that found in active galactic nuclei. The reflection component is very likely produced by an ionised disk (the accretion disk around the white dwarf) and naturally explains the presence of the fluorescent Fe emission line at 6.4 keV while also contributing to the soft and medium energy ranges. The variability of the global X-ray properties of CH Cyg are discussed as well as the variation of the three Fe lines around the 6-7 keV energy range. We conclude that reflection components are needed to model the hard X-ray emission and may be present in most -type SySt.
arXiv comment12 pages, 7 figures, 5 tables; To appear in MNRAS
References in corpus (33)
- On the Absorption of X-rays in the Interstellar Medium
- Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
- Improved Reflection Models of Black-Hole Accretion Disks: Treating the Angular Distribution of X-rays
- X-ray photoionized plasma diagnostics with Helium-like ions. Application to Warm Absorber-Emitter in Active Galactic Nuclei
- X-ray Emissions from Accreting White Dwarfs: a Review
- New Spectral Model for Constraining Torus Covering Factors from Broadband X-ray Spectra of Active Galactic Nuclei
- Evidence for Black Hole Spin in GX 339-4: XMM-Newton EPIC-pn and RXTE Spectroscopy of the Very High State
- The jet feedback mechanism (jfm) in stars, galaxies and clusters
- The Relativistic Fe Emission Line in XTE J1650-500 with BeppoSAX: Evidence for Black Hole Spin and Light Bending Effects?
- Symbiotic stars in X-rays
- A Swift survey of accretion onto stellar-mass black holes
- The X-ray R Aquarii: A Two-sided Jet and Central Source
- CH Cyg X-ray Jet Activity and Multi-component Structures
- An X-Ray Jet from a White Dwarf - Detection of the Collimated Outflow from CH Cygni with Chandra
- Two SMC Symbiotic stars undergoing steady hydrogen burning
- RefleX: X-ray absorption and reflection in active galactic nuclei for arbitrary geometries
- Outer jet X-ray and radio emission in R Aquarii: 1999.8 to 2004.0
- Spectral and Timing Nature of the Symbiotic X-ray Binary 4U 1954+319: The Slowest Rotating Neutron Star in an X-ray Binary System
- Discovery of Rapid Hard X-ray Variability and New Jet Activity in the Symbiotic Binary R Aqr
- An Apparent Hard X-ray Decline of CH Cygni
- The large-scale ionised outflow of CH Cygni
- A Precessing Jet in the CH Cyg Symbiotic System
- Fe KαLine in Hard X-ray Emitting Symbiotic Stars
- An abundance analysis of the symbiotic star CH Cyg
- Disc instability in RS Ophiuchi: a path to Type Ia supernovae?
- A new interpretation of the remarkable X-ray spectrum of the symbiotic star CH Cyg
- Suzaku observation of the LINER NGC 4102
- Dissecting a disk-instability outburst in a symbiotic star: , and observations of T Coronae Borealis during the rise to the "super-active" state
- Observational hints on the torus obscuring gas behaviour through X-rays with NuSTAR data
- Broad Iron Lines in AGN and X-ray Binaries
- Long-term X-ray Variability of the Symbiotic System RT Cru based on Chandra Spectroscopy
- An XMM-Newton EPIC X-ray view of the Symbiotic Star R~Aquarii
- A broadband X-ray study of the asynchronous polar: CD Ind