Zobrazeno 1 - 10
of 104
pro vyhledávání: '"Ginzburg, Sivan"'
Autor:
Ginzburg, Sivan
Sufficiently old white dwarfs cool down through a convective envelope that directly couples their degenerate cores to the surface. Magnetic fields may inhibit this convection by stiffening the criterion for convective instability. We consistently imp
Externí odkaz:
http://arxiv.org/abs/2408.04695
Autor:
Blatman, Daniel, Ginzburg, Sivan
Ultramassive white dwarfs with masses $M\gtrsim 1.1\,{\rm M}_\odot$ probe extreme physics near the Chandrasekhar limit. Despite the rapid increase in observations, it is still unclear how many harbour carbon-oxygen (CO) versus oxygen-neon (ONe) cores
Externí odkaz:
http://arxiv.org/abs/2406.08536
Millisecond pulsars with white dwarf companions have typical eccentricities $e\sim 10^{-6}-10^{-3}$. The eccentricities of helium white dwarfs are explained well by applying the fluctuation-dissipation theorem to convective eddies in their red giant
Externí odkaz:
http://arxiv.org/abs/2405.03745
Period bouncers are cataclysmic variables (CVs) that have evolved past their orbital period minimum. The strong disagreement between theory and observations of the relative fraction of period bouncers is a severe shortcoming in the understanding of C
Externí odkaz:
http://arxiv.org/abs/2401.14389
Autor:
Blatman, Daniel, Ginzburg, Sivan
A convective dynamo operating during the crystallization of white dwarfs is one of the promising channels to produce their observed strong magnetic fields. Although the magnitude of the fields generated by crystallization dynamos is uncertain, their
Externí odkaz:
http://arxiv.org/abs/2311.09299
Black widows and redbacks are binary millisecond pulsars with close low-mass companions that are irradiated and gradually ablated by the pulsar's high-energy luminosity $L_{\rm irr}$. These binaries evolve primarily through magnetic braking, which ex
Externí odkaz:
http://arxiv.org/abs/2307.04160
Autor:
Feinstein, Adina D., France, Kevin, Youngblood, Allison, Duvvuri, Girish M., Teal, DJ, Cauley, P. Wilson, Seligman, Darryl Z., Gaidos, Eric, Kempton, Eliza M. R., Bean, Jacob L., Diamond-Lowe, Hannah, Newton, Elisabeth, Ginzburg, Sivan, Plavchan, Peter, Gao, Peter, Schlichting, Hilke
High energy X-ray and ultraviolet (UV) radiation from young stars impacts planetary atmospheric chemistry and mass loss. The active $\sim 22$ Myr M dwarf AU Mic hosts two exoplanets orbiting interior to its debris disk. Therefore, this system provide
Externí odkaz:
http://arxiv.org/abs/2205.09606
It has been recently suggested that white dwarfs generate magnetic fields in a process analogous to the Earth. The crystallization of the core creates a compositional inversion that drives convection, and combined with rotation, this can sustain a ma
Externí odkaz:
http://arxiv.org/abs/2202.12902
Autor:
Ginzburg, Sivan, Chiang, Eugene
Eccentric millisecond pulsars (eMSPs) with white dwarf companions exhibit orbital eccentricities orders of magnitude larger than predicted by turbulent convection in the white dwarfs' red giant progenitors. The orbital periods of eMSPs cluster around
Externí odkaz:
http://arxiv.org/abs/2109.10361
Autor:
Ginzburg, Sivan, Quataert, Eliot
Publikováno v:
MNRAS 507, 475-483 (2021)
A nova eruption irradiates and heats the donor star in a cataclysmic variable to high temperatures $T_{\rm irr}$, causing its outer layers to expand and overflow the Roche lobe. We calculate the donor's heating and expansion both analytically and num
Externí odkaz:
http://arxiv.org/abs/2104.11250