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How do neutron star binaries form?

What physical interactions actually make single stars leave their binary companions at formation?What happens to the neighboring star of a type Ia supernova?Regarding binary systems (with pulsars)Will a black hole eventually turn into a neutron star?Can a binary star system create a stationary black hole?Kepler's 3rd law applied to binary systems: How can the two orbits have different semi-major axes?On Planets orbiting binary stars

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Do neutron star binary systems come from previously active-star binaries, where where both stars have gone supernova and left behind neutron stars that are still in orbit? Or do they form when two previously unbound neutron stars approach each other and fall into orbit?

astrophysics neutron-stars stellar-evolution binary-stars

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Do neutron star binary systems come from previously active-star binaries, where where both stars have gone supernova and left behind neutron stars that are still in orbit? Or do they form when two previously unbound neutron stars approach each other and fall into orbit?

astrophysics neutron-stars stellar-evolution binary-stars

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edited 11 hours ago

Qmechanic♦

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$begingroup$

Do neutron star binary systems come from previously active-star binaries, where where both stars have gone supernova and left behind neutron stars that are still in orbit? Or do they form when two previously unbound neutron stars approach each other and fall into orbit?

astrophysics neutron-stars stellar-evolution binary-stars

share|cite|improve this question

edited 11 hours ago

Qmechanic♦

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asked 11 hours ago

WillGWillG

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edited 11 hours ago

Qmechanic♦

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edited 11 hours ago

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edited 11 hours ago

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1 Answer
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Neutron star binaries are thought to mostly form from binary systems containing two massive stars, both of which must go through a supernova stage.

Details can be surmised from this talk by Podsialowski (a noted authority on the topic). In order to get neutron star binaries that are close enough to merge (via gravitational wave emission) in the time available since the start of the universe, it is necessary for both mass transfer and common envelope evolution to occur, although another possibility could be 3-body interactions between the binary and other members of a dense cluster.

EDIT: I'm revising my answer slightly in the light of stumbling across a recent paper by Belczynski et al. (2018). In this paper they discuss THREE channels by with close neutron star binaries can occur. (1) The evolution of an isolated binary ststem, as I described above. (2) Complicated interactions between binary systems within a dense stellar aggregate (i.e. a globular cluster). (3) Multi-body interactions and dynamical friction within dense nuclear clusters at the centres of galaxies. The simulations in this paper result in the concluson that although there are routes to form the progenitors of merging neutron star binaries by channels (2) and (3), that the rate of neutron star mergers produced by channel (1) is 100 times higher.

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Rob JeffriesRob Jeffries

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6

$begingroup$

Neutron star binaries are thought to mostly form from binary systems containing two massive stars, both of which must go through a supernova stage.

Details can be surmised from this talk by Podsialowski (a noted authority on the topic). In order to get neutron star binaries that are close enough to merge (via gravitational wave emission) in the time available since the start of the universe, it is necessary for both mass transfer and common envelope evolution to occur, although another possibility could be 3-body interactions between the binary and other members of a dense cluster.

EDIT: I'm revising my answer slightly in the light of stumbling across a recent paper by Belczynski et al. (2018). In this paper they discuss THREE channels by with close neutron star binaries can occur. (1) The evolution of an isolated binary ststem, as I described above. (2) Complicated interactions between binary systems within a dense stellar aggregate (i.e. a globular cluster). (3) Multi-body interactions and dynamical friction within dense nuclear clusters at the centres of galaxies. The simulations in this paper result in the concluson that although there are routes to form the progenitors of merging neutron star binaries by channels (2) and (3), that the rate of neutron star mergers produced by channel (1) is 100 times higher.

share|cite|improve this answer

edited 8 hours ago

answered 11 hours ago

Rob JeffriesRob Jeffries

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$endgroup$

add a comment | 

6

$begingroup$

Neutron star binaries are thought to mostly form from binary systems containing two massive stars, both of which must go through a supernova stage.

Details can be surmised from this talk by Podsialowski (a noted authority on the topic). In order to get neutron star binaries that are close enough to merge (via gravitational wave emission) in the time available since the start of the universe, it is necessary for both mass transfer and common envelope evolution to occur, although another possibility could be 3-body interactions between the binary and other members of a dense cluster.

EDIT: I'm revising my answer slightly in the light of stumbling across a recent paper by Belczynski et al. (2018). In this paper they discuss THREE channels by with close neutron star binaries can occur. (1) The evolution of an isolated binary ststem, as I described above. (2) Complicated interactions between binary systems within a dense stellar aggregate (i.e. a globular cluster). (3) Multi-body interactions and dynamical friction within dense nuclear clusters at the centres of galaxies. The simulations in this paper result in the concluson that although there are routes to form the progenitors of merging neutron star binaries by channels (2) and (3), that the rate of neutron star mergers produced by channel (1) is 100 times higher.

share|cite|improve this answer

edited 8 hours ago

answered 11 hours ago

Rob JeffriesRob Jeffries

73.8k77 gold badges158158 silver badges256256 bronze badges

$endgroup$

add a comment | 

$begingroup$

Neutron star binaries are thought to mostly form from binary systems containing two massive stars, both of which must go through a supernova stage.

Details can be surmised from this talk by Podsialowski (a noted authority on the topic). In order to get neutron star binaries that are close enough to merge (via gravitational wave emission) in the time available since the start of the universe, it is necessary for both mass transfer and common envelope evolution to occur, although another possibility could be 3-body interactions between the binary and other members of a dense cluster.

EDIT: I'm revising my answer slightly in the light of stumbling across a recent paper by Belczynski et al. (2018). In this paper they discuss THREE channels by with close neutron star binaries can occur. (1) The evolution of an isolated binary ststem, as I described above. (2) Complicated interactions between binary systems within a dense stellar aggregate (i.e. a globular cluster). (3) Multi-body interactions and dynamical friction within dense nuclear clusters at the centres of galaxies. The simulations in this paper result in the concluson that although there are routes to form the progenitors of merging neutron star binaries by channels (2) and (3), that the rate of neutron star mergers produced by channel (1) is 100 times higher.

share|cite|improve this answer

edited 8 hours ago

answered 11 hours ago

Rob JeffriesRob Jeffries

73.8k77 gold badges158158 silver badges256256 bronze badges

$endgroup$

share|cite|improve this answer

edited 8 hours ago

answered 11 hours ago

Rob JeffriesRob Jeffries

73.8k77 gold badges158158 silver badges256256 bronze badges

answered 11 hours ago

Rob JeffriesRob Jeffries

73.8k77 gold badges158158 silver badges256256 bronze badges

answered 11 hours ago

Rob JeffriesRob Jeffries

73.8k77 gold badges158158 silver badges256256 bronze badges