4 papers
The eclipsing binary millisecond pulsar PSR B1744-24A - possible test for a magnetic braking mechanism
Ene Ergma, Marek J. Sarna
As presented by Nice et al. (2000), long-term timing of the eclipsing binary PSR B1744-24A shows that the orbital period of this system decreases with a time-scale of only ~ 200 My…
An evolutionary scenario for the U Scorpii
Ene Ergma, Jelena Gerskevits, Marek J. Sarna
We perform evolutionary calculations of binary stars to find progenitors of systems with parameters similar to the recurrent novae U Sco. We show that a U Sco type-system may be fo…
An evolutionary model for SAX J1808.4 -- 3658
Ene Ergma, Jelena Antipova
An evolutionary scenario to explain the transient nature and short total duration of the X-ray burst of SAX J1808.4 -- 3658 is proposed. An optical companion of the neutron star (a…
Cyg X-3: can the compact object be a black hole?
Ene Ergma, Lev R. Yungelson
By means of population synthesis we find that the expected Galactic number of black holes with massive helium star companions is \sim 100 and depends on an assumed threshold for M_…