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The Symbiotic Stars
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The Symbiotic Stars
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Any white dwarf or neutron star that accretes enough material from a red giant companion, such that this interaction can be detected at some wavelength, is currently termed Symbiotic Star (typical P(orb)=2-3 years). In the majority of ~400 known systems, the WD burns nuclearly at its surface the accreted material, and the resulting high temperature (T(eff)=10(^5)~K) and luminosity (L(hot)=10(^3)-10(^4) Lsun) allow ionization of a large fraction of the cool giant's wind, making such symbiotic stars easily recognizable through the whole Galaxy and across the Local Group. X-ray observations are now revealing the existence of a parallel (and larger ?) population of optically-quiet, accreting-only symbiotic stars. Accretion flows and disks, ionization fronts and shock, complex 3D geometries and new evolution channels are gaining relevance and are reshaping our understanding of symbiotic stars. We review the different types of symbiotic stars currently in the family and their variegated outburst behaviors through an unified evolution scheme connecting them all.
Forward citations
Cited by 6 Pith papers
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Detection of Millimeter-Wavelength Flares from Two Accreting White Dwarf Systems in the SPT-3G Galactic Plane Survey
The first blind millimeter-wave search of the Galactic Plane found two roughly one-day flares from accreting white dwarf binaries, with isotropic luminosities near 10^31 erg/s.
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A systematic assessment of the short-term X-ray behaviour of the $\gamma$ Cas analogues
Kilosecond X-ray periodicities are persistent in five γ Cas analogues, with periods and pulsed fractions matching intermediate-polar white dwarfs.
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X-ray luminous late-type giants: an overlooked population contributing to the Galactic ridge iron line emission
X-ray luminous late-type giant binaries contribute ~20% of the GRXE continuum and ~40% of its iron line emission.
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High-Resolution Spectroscopy of Raman-scattered He II Lines in the Symbiotic Nova RR Telescopii
Observations of Raman-scattered He II lines in RR Telescopii reveal distinct velocities tracing different H I depths and temporal declines in conversion efficiency, implying the neutral region needs complex radiative ...
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The first hours and days of the 2021 explosion of the recurrent symbiotic nova RS Ophiuchii
SED modeling of early 2021 RS Oph data indicates bipolar ejecta with equatorial disk and confirms significant WD radiation originates from reprocessed shock emission explained by WD rotation.
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New Online Database of Symbiotic Variables: Catalog and Statistical Overview of Symbiotic Binaries
NODSV is a new public catalog of ~1400 symbiotic binaries with classifications into confirmed, candidate, and misidentified categories plus a statistical overview of their properties.
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