Updated evolutionary sequences for hydrogen-deficient white dwarfs
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Cita com:
hdl:2117/108520
Tipus de documentArticle
Data publicació2017-04-10
EditorInstitute of Physics (IOP)
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
We present a set of full evolutionary sequences for white dwarfs with hydrogen-deficient atmospheres. We take into account the evolutionary history of the progenitor stars, all the relevant energy sources involved in the cooling, element diffusion in the very outer layers, and outer boundary conditions provided by new and detailed non-gray white dwarf model atmospheres for pure helium composition. These model atmospheres are based on the most up-to-date physical inputs. Our calculations extend down to very low effective temperatures, of ~2500 K, provide a homogeneous set of evolutionary cooling tracks that are appropriate for mass and age determinations of old hydrogen-deficient white dwarfs, and represent a clear improvement over previous efforts, which were computed using gray atmospheres.
CitacióCamisassa, M., Althaus, L. G., Rohrmann, R., Garcia-berro, E., Torres, S., Corsico, A., Wachlin, F. Updated evolutionary sequences for hydrogen-deficient white dwarfs. "The Astrophysical Journal Letters", 10 Abril 2017, vol. 839, núm. 11, p. 1-11.
ISSN1538-4357
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