Dynamical instability in accreting white dwarfs |
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| Authors: | D. García J. Labay R. Canal J. Isern |
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| Affiliation: | (1) Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Spain;(2) Departament de Física de l'Atmosfera, Astronomía i Astrofisica, Universitat de Barcelona, Spain;(3) Grup d'Astrofísica, Societat Catalana de Física, I.E.C., Spain;(4) Centre d'Estudis Avançats, C.S.I.C., Spain |
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| Abstract: | We study the evolution of solid, CO white dwarfs after explosive carbon ignition at central densities around 1010 g cm–3 triggered by steady accretion in a close binary system, in order to elucidate whether these stars can collapse to form a neutron star. We show that as long as the velocity of the burning front remains below a critical value of 0.006cs ( 60 km s–1), gravitational collapse is the final fate. These calculations support the accretion-induced collapse (AIC) scenario for the origin of a fraction of low-mass X-ray binaries.Paper presented at the 11th European Regional Astronomical Meetings of the IAU on  New Windows to the Universe , held 3–8 July, 1989, Tenerife, Canary Islands, Spain. |
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