On the Evolution of Massive Stars; Pulsars, Supernova Remnants, Runaways and Genetic Connections Between Them

Details On the Evolution of Massive Stars; Pulsars, Supernova Remnants, Runaways and Genetic Connections Between Them On the Evolution of Massive Stars; Pulsars, Supernova Remnants, Runaways and Genetic Connections Between Them

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phdt.........1a&link_type=abstract

Ph. D. Thesis, Middle East Technical University, Department of Physics, Ankara, May 2002, 130 pages

Physics

Neutron Stars, Pulsars, Supernova Remnants, Runaway Stars

Scientific paper

Observational data support the disruption of massive binary systems due to supernova explosion and in the case of massive close binaries the disruption form a neutron star and a runaway O or B type star. Identifying genetic connections of runaway OB stars (i.e. OB stars with space velocity > 30 km/s) and of neutron stars/pulsars to supernova remnants lead to some important results about characteristics of supernova explosions (e.g. degree and direction of the asymmetry of the explosion). Examination of such genetic connections also give us information about the properties of massive binaries (e.g. the mass ratio). In order to get a complete picture, the case of non-disruption of massive binaries after the supernova explosion is also examined. The fact of the number of such non-disruption cases of massive binaries, i.e. high mass X-ray binaries, being small compared to the number of disruption cases, i.e. single pulsars and single OB runaway stars, shows that in most of the cases the massive binary is disrupted due to the explosion. The average space velocity of pulsars (˜300 km/s), which is about 3-10 times larger than the space velocity (due to the orbital velocity before the disruption of the binary) of single runaway OB stars and the space velocity (due to a small degree of asymmetry for the supernova explosion) of runaway high mass X-ray binaries also support this fact.

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