The Experts below are selected from a list of 39 Experts worldwide ranked by ideXlab platform

Charles R. Evans - One of the best experts on this subject based on the ideXlab platform.

  • Evolution of small-mass-ratio binaries with a spinning secondary
    Physical Review D, 2017
    Co-Authors: Niels Warburton, Thomas Osburn, Charles R. Evans
    Abstract:

    We calculate the evolution and gravitational-wave emission of a spinning compact object inspiraling into a substantially more massive (non-rotating) black hole. We extend our previous model for a non-spinning binary [Phys. Rev. D 93, 064024] to include the Mathisson-Papapetrou-Dixon spin-curvature force. For spin-aligned binaries we calculate the dephasing of the inspiral and associated waveforms relative to models that do not include spin-curvature effects. We find this dephasing can be either positive or negative depending on the initial separation of the binary. For binaries in which the spin and orbital angular momentum are not parallel, the orbital plane precesses and we use a more general Osculating Element prescription to compute inspirals.

Niels Warburton - One of the best experts on this subject based on the ideXlab platform.

  • Evolution of small-mass-ratio binaries with a spinning secondary
    Physical Review D, 2017
    Co-Authors: Niels Warburton, Thomas Osburn, Charles R. Evans
    Abstract:

    We calculate the evolution and gravitational-wave emission of a spinning compact object inspiraling into a substantially more massive (non-rotating) black hole. We extend our previous model for a non-spinning binary [Phys. Rev. D 93, 064024] to include the Mathisson-Papapetrou-Dixon spin-curvature force. For spin-aligned binaries we calculate the dephasing of the inspiral and associated waveforms relative to models that do not include spin-curvature effects. We find this dephasing can be either positive or negative depending on the initial separation of the binary. For binaries in which the spin and orbital angular momentum are not parallel, the orbital plane precesses and we use a more general Osculating Element prescription to compute inspirals.

Thomas Osburn - One of the best experts on this subject based on the ideXlab platform.

  • Evolution of small-mass-ratio binaries with a spinning secondary
    Physical Review D, 2017
    Co-Authors: Niels Warburton, Thomas Osburn, Charles R. Evans
    Abstract:

    We calculate the evolution and gravitational-wave emission of a spinning compact object inspiraling into a substantially more massive (non-rotating) black hole. We extend our previous model for a non-spinning binary [Phys. Rev. D 93, 064024] to include the Mathisson-Papapetrou-Dixon spin-curvature force. For spin-aligned binaries we calculate the dephasing of the inspiral and associated waveforms relative to models that do not include spin-curvature effects. We find this dephasing can be either positive or negative depending on the initial separation of the binary. For binaries in which the spin and orbital angular momentum are not parallel, the orbital plane precesses and we use a more general Osculating Element prescription to compute inspirals.

Evans, Charles R. - One of the best experts on this subject based on the ideXlab platform.

  • Evolution of small-mass-ratio binaries with a spinning secondary
    'American Physical Society (APS)', 2017
    Co-Authors: Warburton Niels, Osburn Thomas, Evans, Charles R.
    Abstract:

    We calculate the evolution and gravitational-wave emission of a spinning compact object inspiraling into a substantially more massive (non-rotating) black hole. We extend our previous model for a non-spinning binary [Phys. Rev. D 93, 064024] to include the Mathisson-Papapetrou-Dixon spin-curvature force. For spin-aligned binaries we calculate the dephasing of the inspiral and associated waveforms relative to models that do not include spin-curvature effects. We find this dephasing can be either positive or negative depending on the initial separation of the binary. For binaries in which the spin and orbital angular momentum are not parallel, the orbital plane precesses and we use a more general Osculating Element prescription to compute inspirals.Comment: 17 pages, 6 figure

Rosengren, Aaron J. - One of the best experts on this subject based on the ideXlab platform.

  • Space Occupancy in Low-Earth Orbit
    2020
    Co-Authors: Bombardelli Claudio, Falco Gabriele, Amato Davide, Rosengren, Aaron J.
    Abstract:

    With the upcoming launch of large constellations of satellites in the low-Earth orbit (LEO) region it will become important to organize the physical space occupied by the different operating satellites in order to minimize critical conjunctions and avoid collisions. Here, we introduce the definition of space occupancy as the domain occupied by an individual satellite as it moves along its nominal orbit under the effects of environmental perturbations throughout a given interval of time. After showing that space occupancy for the zonal problem is intimately linked to the concept of frozen orbits and proper eccentricity, we provide frozen-orbit initial conditions in Osculating Element space and obtain the frozen-orbit polar equation to describe the space occupancy region in closed analytical form. We then analyze the problem of minimizing space occupancy in a realistic model including tesseral harmonics, third-body perturbations, solar radiation pressure, and drag. The corresponding initial conditions, leading to what we call minimum space occupancy (MiSO) orbits, are obtained numerically for a set of representative configurations in LEO. The implications for the use of MiSO orbits to optimize the design of mega-constellations are discussed.Comment: Submitted to The Journal of Guidance, Control, and Dynamic