Irradiation-driven mass transfer low-mass X-ray binaries

Details Irradiation-driven mass transfer low-mass X-ray binaries Irradiation-driven mass transfer low-mass X-ray binaries

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.350..136p&link_type=abstract

Nature (ISSN 0028-0836), vol. 350, March 14, 1991, p. 136-138.

Computer Science

116

Accretion Disks, Binary Stars, Neutron Stars, Stellar Mass, X Ray Irradiation, Companion Stars, Mass Transfer, Stellar Evolution

Scientific paper

In a low-mass X-ray binary (LMXB), mass accreted onto a neutron star from a larger companion generates a flux of X-rays which irradiate the companion. It is shown here that, under the radiative flux typical of an LMXB, the companion will expand towards a new state of thermal equilibrium and that this expansion provides a new mechanism to drive mass transfer onto the neutron star. The evolution of LMXBs can be drastically altered in this way. In particular, this mechanism may introduce a new evolutionary phase during which the orbital period increases, leading to larger orbital periods during and at the end of mass transfer and shortening the duration of the LMXB phase.

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