Superfluid properties of the inner crust of neutron stars

Alessandro Pastore; Simone Baroni; Crisitna Losa

doi:10.1103/PhysRevC.84.065807

Superfluid properties of the inner crust of neutron stars

Alessandro Pastore, Simone Baroni, Crisitna Losa

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

We investigated the superfluid properties of the inner crust of neutron stars, solving the Hartree-Fock-Bogoliubov equations in spherical Wigner-Seitz cells. Using realistic two-body interactions in the pairing channel, we studied in detail the Cooper-pair and the pairing-field spatial properties, together with the effect of the proton clusters on the neutron pairing gap. Calculations with effective pairing interactions are also presented, showing significant discrepancies with the results obtained with realistic pairing forces. At variance with recent studies on finite nuclei, the neutron coherence length is found to depend on the strength of the pairing interaction, even inside the nucleus. We also show that the spherical Wigner-Seitz approximation breaks down in the innermost regions of the inner crust, already at baryonic densities ρb≥8×10+13 g/cm3.

Original language	English
Journal	Physical Review C (Nuclear Physics)
Volume	84
DOIs	https://doi.org/10.1103/PhysRevC.84.065807
Publication status	Published - 2011

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10.1103/PhysRevC.84.065807

Cite this

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title = "Superfluid properties of the inner crust of neutron stars",

abstract = "We investigated the superfluid properties of the inner crust of neutron stars, solving the Hartree-Fock-Bogoliubov equations in spherical Wigner-Seitz cells. Using realistic two-body interactions in the pairing channel, we studied in detail the Cooper-pair and the pairing-field spatial properties, together with the effect of the proton clusters on the neutron pairing gap. Calculations with effective pairing interactions are also presented, showing significant discrepancies with the results obtained with realistic pairing forces. At variance with recent studies on finite nuclei, the neutron coherence length is found to depend on the strength of the pairing interaction, even inside the nucleus. We also show that the spherical Wigner-Seitz approximation breaks down in the innermost regions of the inner crust, already at baryonic densities ρb≥8×10+13 g/cm3.",

author = "Alessandro Pastore and Simone Baroni and Crisitna Losa",

year = "2011",

doi = "10.1103/PhysRevC.84.065807",

language = "English",

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journal = "Physical Review C (Nuclear Physics)",

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publisher = "American Physical Society",

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AU - Baroni, Simone

AU - Losa, Crisitna

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AB - We investigated the superfluid properties of the inner crust of neutron stars, solving the Hartree-Fock-Bogoliubov equations in spherical Wigner-Seitz cells. Using realistic two-body interactions in the pairing channel, we studied in detail the Cooper-pair and the pairing-field spatial properties, together with the effect of the proton clusters on the neutron pairing gap. Calculations with effective pairing interactions are also presented, showing significant discrepancies with the results obtained with realistic pairing forces. At variance with recent studies on finite nuclei, the neutron coherence length is found to depend on the strength of the pairing interaction, even inside the nucleus. We also show that the spherical Wigner-Seitz approximation breaks down in the innermost regions of the inner crust, already at baryonic densities ρb≥8×10+13 g/cm3.

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JO - Physical Review C (Nuclear Physics)

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