2021
DOI: 10.48550/arxiv.2104.11250
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Novae heat their food: mass transfer by irradiation

Sivan Ginzburg,
Eliot Quataert

Abstract: A nova eruption irradiates and heats the donor star in a cataclysmic variable to high temperatures irr , causing its outer layers to expand and overflow the Roche lobe. We calculate the donor's heating and expansion both analytically and numerically and find that irradiation drives enhanced mass transfer from the donor at a rate ∝ 5/3 irr , which reaches ∼ 10 −6 M ⊙ yr −1 at the peak of the eruption -about a thousand times faster than during quiescence. As the nova subsides and the white dwarf cools down, drop… Show more

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Cited by 3 publications
(3 citation statements)
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“…In Appendix A we estimate the mass-loss ∆m fly from M 2 per close passage, following the formalism of Ginzburg & Quataert (2021). We find (Eq.…”
Section: Mass Loss From Flybysmentioning
confidence: 99%
“…In Appendix A we estimate the mass-loss ∆m fly from M 2 per close passage, following the formalism of Ginzburg & Quataert (2021). We find (Eq.…”
Section: Mass Loss From Flybysmentioning
confidence: 99%
“…Accreting white dwarf binaries are called cataclysmic variables, as many of them display two distinct types of violent phenomena that dramatically increase their brightness (Hellier 2001;Warner 2003;Knigge et al 2011): classical nova eruptions and dwarf nova outbursts. Nova eruptions may strongly affect the evolutionary path of those binaries (Nelemans et al 2016;Ginzburg & Quataert 2021).…”
Section: Classical and Dwarf Novaementioning
confidence: 99%
“…There may be other ways by which novae destroy their companion stars, in a comparatively rapid but non-dynamical manner. Some CVs exhibit elevated mass transfer rates triggered by irradiation of the secondary by the nova outburst (e.g.,Ginzburg & Quataert 2021); insofar as novae occur more frequently for higher mass transfer rates, this could in principle a positive feedback cycle that erodes the companion mass within millions of years (e.g.,Knigge et al 2000;Patterson et al 2013). 3 By contrast, if angular momentum is largely conserved during a novae, then the binary separation will expand; this may lead to a decline in accretion rate compared to that just before the novae, and is the origin of the hypothesis that CVs "hibernate" after a nova eruption(Prialnik & Shara 1986;Shara et al 1986;Kovetz et al 1988;Hillman et al 2020).…”
mentioning
confidence: 99%